Previously when we found an ICU that was the only translatable content
in its i18n block, we assigned the block's i18n context to the ICU.
However, we neglected to set the contextKind to inidcate that the
context was associated with an ICU. As of this change we now set the
correct contextKind.
This change also refactors the context creation to explicitly separate
creation of contexts for attributes, root i18n blocks, child i18n
blocks, and ICUs. This allows us to more easily ensure that contexts are
shared appropriately between i18n blocks and ICUs.
Finally, this change also refactors the i18n message extraction pahse to
simplify how contexts are converted to i18n messages. This
simplification should make it easier to merge i18n contexts and i18n
messages into a single op in a future refactor.
PR Close#53557
Whenever an input of a directive changes, the semantic symbol should
reflect this change for the type check API. This is important because
signal inputs require special output in the type checking blocks- hence
we need to ensure that such type checking blocks are re-generated
properly.
Test verify that incremental type-checking builds work as expected now.
PR Close#53521
Whenever a signal input is captured in a type check block, we will
insert an import. This will change the import graph so that the full
TypeScript program cannot be structurally re-used.
We can fix this trivially by ensuring the import graph remains stable,
by always generating an import to e.g. `@angular/core`. This fixes the
issue nicely for type-check block files. A test verifies this.
For inline code, such as TCB inline or the type constructors inline,
this fix is not applicable because we would change user-input source files,
adding new edges that would not exist for subsequent builds- causing the
program to be not re-used completely. One idea was to rely on the
existing edge that can be assumed to exist for directive code files.
This is true technically, but in practice TS does not deduplicate
imports- so our new namespace import when referencing our symbols will
invalidate the re-use. We will address this in a follow-up. There are a
couple of options, such as working with the TS team, updating the
existing edge, or inlining our helpers as well.
PR Close#53521
This commit adds the last remaining piece for signal input
type-checking. Bound values to signal inputs are already checked
properly at this point, but inference of generic directive/component
types through their inputs is not implemented.
This commit fixes this. To achieve this, there are a couple of potential
solutions. The generics of a directive are inferred based on input
value expressions using a so-called type constructor. The constructor
looks something like this:
```
const _ctor = <T>(v: Pick<Dir<T>, 'input1', 'input2'>) => Dir<T>;
_ctor({input1: expr1, input2: expr2});
```
This works very well for non-signal inputs where the class member is
directly holding the input values. For signal inputs, this does NOT
work because the class member will actually hold the `InputSignal`
instance. There are a couple of solutions to this:
1. Calling `_ctor` with an `InputSignal<typeof value>`
2. Converting the `_ctor` input signal fields to their write types
(unwrapping the input signals).
We've decided to go with the second option as TypeScript is very
sensitive with assignments and its checks. i.e. co-variance,
contravariance or bivariance. Semantically it makes more sense to unwrap
the input signal "write type" directly and "assign to it". This is safer
and conceptually also easier to follow. A type constructor continues to
only receive the "expresison values". This simplifies code as well.
It's worth noting that the unwrapping as per option 2 also comes at a
cost. We need to be able to generate imports in type constructors. This
was not possible until the previous commit because inline type constructors
did not have an associated type-check block `Environment` and we were
missing access to expression translation and correct import generation.
Overall, solution 2 is now implemented as works as expected. This commit
adds additional unit tests to ensure this.
PR Close#53521
For signal inputs we are looking at generating additional code inside
type constructors. This code is planned to reference an external type
from `@angular/core` to unwrap `InputSignal`'s class fields.
The existing `Environment` class contains helpers for emitting such
references / and translating them from the output AST. We extract
this logic into a superclass for only emitting references. A similar
type already existed to avoid circular dependencies- but now we have
actual use-cases to populate this as a base class.
This allows us to create more-suitable minimal emit environments
when we e.g. generate type constructors inline- which are not
part of any type check block. The existing `Environment` class is scoped
to type check blocks and therefore was not suitable.
PR Close#53521
Signal inputs do not need coercion members for their transforms. That is
because the `InputSignal` type- which is accessible in the class member-
already holds the type of potential "write values". This eliminates the
need for coercion members which were simply used to somehow capture this
write type (especially when libraries are consumed and only `.d.ts` is
available).
We can simplify this, and also significantlky loosen restrictions
of transform functions- given that we can fully rely on TypeScript for
inferring the type. There is no requirement in being able to
"transplant" the type into different places- hence also allowing
supporting transform functions with generics, or overloads.
In a follow-up commit, once more parts are place, there will be some
compliance tests to ensure these new "loosend restrictions".
PR Close#53521
This commit ensures that the type-check diagnostic testing
infrastructure is prepared to validate signal inputs. i.e. providing the
necessary "mocks" in the fake "d.ts" of `@angular/core`.
The commit then sets up a Golang-style table driven testing environment
that allows us to validate/verify signal input type-checking in a
readable way.
With this infrastructure set up, this commit defines an initial set
of unit tests for type checking of input signals.
PR Close#53521
This commit introduces the initial type-checking for signal inputs.
To enable type-checking od signal inputs, there are a couple of tricks
needed. It's not trivial as it would look like at first glance.
Initial attempts could have been to generate additional statements in
type-checking blocks for signal inputs to simply call a method like
`InputSignal#applyNewValue`. This would seem natural, as it would match
what will happen at runtime, but this would break the language-service
auto completion in a highly subtle way. Consider the case where multiple
directives match the same input. Consider the directives have some
overlap in accepted input values, but they also have distinct diverging
values, like:
```ts
class DirA {
value = input<'apple'|'shared'>();
}
class DirB {
value = input<'orange'|'shared'>();
}
```
In such cases, auto completion for the binding expression should suggest
the following values: `apple`, `shared`, `orange` and `undefined`.
The language service achieves this by getting completions in the
type-check block where the user expression would live. This BREAKS if
we'd have multiple places where the expression from the user is used.
Two different places, or more, surface additional problems with
diagnostic collection. Previously diagnostics would surface the union
type of allowed values, but with multiple places, we'd have to work with
potentially 1+ diagnostics. This is non-ideal.
Another important consideration is test coverage. It might sound
problematic to consider the existing test infrastructure as relevant,
but in practice, we have thousands of diagnostic type check block tests
that would greatly benefit if the general emit structure would still
match conceptually. This is another bonus argument on why changing the
way inputs are applied is probably an option we should consider as a
last resort.
Ultimately, there is a good solution where we unwrap directive signal
inputs, based on metadata, and access a brand type field on the
`InputSignal`. This ensures auto-completion continues to work as is, and
also the structure of type check blocks doesn't change conceptually. In
future commits we also need to handle type-inference for generic signal
inputs.
Note: Another alternative considered, in terms of using metadata or not.
We could have type helpers to unwrap signal inputs using type helpers
like: `T extends InputSignal<any, WriteT> ? WriteT : T`. This would
allow us to drop the input signal metadata dependency, but in reality,
this has a few issues:
- users might have `@Input`'s passing around `InputSignal`'s. This is
unlikely, but shows that the solution would not be fully correct.
- we need the metadata regardless, as we plan on accessing it at runtime
as well, to distinguish between signal inputs and normal inputs when
applying new values. This was not clear when this option was
considered initially.
PR Close#53521
This commit captures the metadata on whether an input is signal based or
not, in the `.d.ts` of directives and components. This exposes this
information to consumers of the directives. This is needed because
libraries may use signal inputs, and we need to know whether bound
inputs to this library are signal-based or not- so that we can generate
proper type-checking code (account for `InputSignal` or not).
Additionally, this commit introduces a new structure for the partial
compilation output of directive inputs. With the current emit, inputs
are captured in a data structure that is equivalent to the internal data
structure passed to `defineDirective` (the full compilation output).
This worked fine as we only captured a few strings, but in ends up
being a bad practice because partial compilation output should NOT
capture internal data structures that might be specific to a certian
Angular core version. Instead, we introduce a new "future proof"
structure that:
- can hold additional metadata in backwards-compatible ways, like
`isSignal` or `isRequired`.
- can be parsed trivially using the `AstHost` for the linker, instead of
having to unwrap/parse an array structure.
The new structure is only emitted when we discover that some inputs are
signal based (or ultimately end up configuring input flags). This is
done for backwards compatibility, so that libraries without signal
inputs remain compatible with older linker versions. In the future,
this might be the only emit.
Compliance tests for this follow in future commits, when the linker
portion is also in place. This commit specialices on the code
generation. With the linker, and compliance test infrastructure fixed
(that is broken right now), we can test the full integration.
PR Close#53521
This commit defines the initial metadata for inputs passed around in
the compiler-cli. Inputs will now capture additional metadata on whether
they are signal-based or not. This is stored on a per-input basis as
a Zone component may contain both, signal inputs or `@Input` inputs.
The metadata is later used for type-checking, for partial output
generation, or full compilation output generation.
PR Close#53521
This commit introduces a function for declaring inputs in
components. The function is called `input`. It comes in two flavors:
- `input` for optional inputs with initial values
- `input.required` for required inputs
Inputs are declared as class members, like with `@Input`- except that
the class field will no longer hold the input value directly. Angular
takes control over the input field and exposes the input value as a
signal. The runtime implementation will follow in future commits.
This commit simply introduces:
- initial compiler detection to recognize such inputs in classes
- the initial signature of `input` and `input.required`.
Note: the defer size test is flawed and there is no minification- hence
this commit also needs to incorporate the new dependency graph changes.
PR Close#53521
`o.WrappedNodeExpr` can show up in some cases, when a host binding's value is inside a TS expression.
It's an open question whether we will need to support all of the TS expression types as a result.
PR Close#53478
For some reason, the parser reuses the same field to store the animation phase and the event target. We were incorrectly interpreting the presence of any value on that field as an animation phase, leading us to incorrectly emit synthetic listener instructions for listeners on events with targets. This bug is now fixes.
PR Close#53478
`$any` should be interpreted as a cast, not as a context read of a variable called `$any`. This already worked in template compilations, but the relevant phase was not enabled for host bindings.
PR Close#53478
Fixes that the compiler was throwing an error if an ambient type is used inside of an input `transform` function. The problem was that the reference emitter was trying to write a reference to the ambient type's source file which isn't necessary.
Fixes#51424.
PR Close#51474
The ops for the implicit variables in `@for` loops (e.g. `$index`) are marked as being mandatory which means that they're generated even if they aren't used. These changes make them optional so they're only added when necessary.
PR Close#53515
Adds support for sanitizing host bindings. Since the tag name of the
element the host binding is being set on isn't always known, we have to
consider multiple possible security contexts.
This commit also adds additional tests to help verify correct behavior
of the sanitization logic for different edge cases.
PR Close#53513
Use the DomElementSchemaRegistry to determine the correct security
context for static attributes, and pass it along during ingestion. Then
during the resolve sanitizers phase, use the security context to
determine if a trusted value function is needed
PR Close#53473
Consider the case:
```
<button *ngIf="true" [@anim]="field"></button>
```
Only the inner `button` should recieve a `property` instruction for the animation binding. We were previously emitting one for the implicit `ng-template` as well, and collecting it into the consts for the `ng-template`. Both of these issues are now fixed.
PR Close#53457
The behavior of explicit bindings on `ng-template`s was untested, and we differed from `TemplateDefinitionBuilder` significantly. We now have much more similar behavior, although not 100% identical.
For example, consider this templarte:
```
<ng-template l="l1" [p]="p1" [attr.a]="a1" [class.c]="c1"></ng-template>
```
It's not clear what a class binding on an `ng-template` would actually do. Nonetheless, it's well-defined behavior in TemplateDefinitionBuilder, which emits `property` instructions for all three bindings, and people actually do this in google3.
Note that some of these bindings don't really make much sense, but we have to support them for compatibility purposes.
See comments for an in-depth explanation of all the logic.
Also, add a test to exercise the problematic case.
PR Close#53457
The Template Pipeline has had a number of tricky bugs involving bindings on structural elements.
Consider this template:
```
<div *ngIf="true" [class.bar]="field"></div>
```
We were incorrectly emitting `ɵɵclassProp` on *both* the template's view, and the inner view. The solution is to just emit an extracted attribute on the enclosing template, so it still shows up in the const array, but does not affect the update block.
We will refactor binding ingestion soon, but this commit improves our correctness before any big refactor.
PR Close#53457
These patches are no longer necessary with the current state of the
type packages and the code within the repository. The types are now
included in the already required babel.d.ts file for the relevant
babel packages (currently: `@babel/core` and `@babel/generator`).
PR Close#53441
The `@babel/core` package provides the functionality of multiple other babel packages
without the need to directly depend or import the other babel packages. Since the
`@babel/core` package is already used and imported in the locations that previously
used the other babel packages, an overall reduction in both imports and dependencies
is possible. Six babel related packages were able to be removed from the root `package.json`
and one (also present in the aforementioned six) was removed as a dependency from the
`@angular/localize` package. Unfortunately, the functionality used from the `@babel/generator`
package is not provided by `@babel/core` and is still present. Further refactoring may
allow its removal as well in the future.
The following packages were removed:
* @babel/parser
* @babel/template
* @babel/traverse
* @babel/types
* @types/babel__template
* @types/babel__traverse
PR Close#53441
@for does not use actual TemplateOps, but instead has a similar
RepeaterCreateOp. This commit adds support for this op to the relevant
i18n phases.
PR Close#53440
This test actually passes, template pipeline just orders the translated
messages and consts array differently. Since the order isn't important,
we just fork off an alternate golden file for template pipeline.
PR Close#53459
I discovered this failure while looking at presubmit results. We appear to still have ordering issues, when more update ops are present.
PR Close#53405
While running a g3 presubmit, I discovered two related novel failure modes:
1. Simple case: this new test uses an `ngFor` structural directive, which binds a context variable. That variable is immediately used in an attribute binding. It looks like we generate an extra attribute instruction, which might result in an invalid property read at runtime.
2. Complex case: this is another attribute binding, this time on a structural element, inside of an `ng-template`. Not sure what's going on here.
PR Close#53405
Previously, binding ops only knew whether they applied to a structural template (and even this was actually very misleading!).
Now, binding ops have full information about what kind of template they apply to, if any (e.g. plain template, structural template, etc). Additionally, each binding knows whether it `IsStructuralTemplateAttribute`, which is a property of the binding rather than the template target.
In the future, we should refactor this to unify the various flags that can describe binding types, as well as the flags that describe template targets, into a single and comprehensive field on binding ops.
PR Close#53405
Previously, we created i18n contexts for i18n attributes in ingest. This turned out to be the wrong approach, because we don't always want to produce i18n messages for all i18n attributes! In fact, several kinds of i18n attributes on elements with structural directives should not produce their own messages.
This commit also contains related refactors to fix one such structural directives test.
PR Close#53405
When a binding is present on an element with a structural directive, that binding is parsed onto *both* the synthetic `ng-template`, as well as the inner element. However, we do not want to create different i18n messages for both bindings; we only want to generate a new i18n message for the inner, "real" element.
PR Close#53405
Listener instructions should not be inside the i18n block. In order to avoid this, we ingest bindings on an element before starting the i18n block.
We previously missed this case because almost all bindings result in *update* instructions, which don't need to be ordered relative to i18nStart/i18nEnd create instructions. However, listeners are the only kind of binding that gets ingested into the create block.
PR Close#53405
Previously, our i18n slot moving process was buggy. Specifically, it was not resilient to cases in which a create op consumed a slot, but no update ops depended on that slot.
The new algorithm fixes this issue, and is also easier to understand.
PR Close#53405
These patches are no longer necessary with the current state of the
type packages and the code within the repository. The types are now
included in the already required babel.d.ts file for the relevant
babel packages (currently: `@babel/core` and `@babel/generator`).
PR Close#53374
The `@babel/core` package provides the functionality of multiple other babel packages
without the need to directly depend or import the other babel packages. Since the
`@babel/core` package is already used and imported in the locations that previously
used the other babel packages, an overall reduction in both imports and dependencies
is possible. Six babel related packages were able to be removed from the root `package.json`
and one (also present in the aforementioned six) was removed as a dependency from the
`@angular/localize` package. Unfortunately, the functionality used from the `@babel/generator`
package is not provided by `@babel/core` and is still present. Further refactoring may
allow its removal as well in the future.
The following packages were removed:
* @babel/parser
* @babel/template
* @babel/traverse
* @babel/types
* @types/babel__template
* @types/babel__traverse
PR Close#53374
I18n expressions logically have both a target and an owner:
- For i18n text expressions, the owner is the i18nStart instruction. The target is initially the same, but later moves to be the last slot consumer in the i18n block.
- For i18n attribute expressions, the owner is the I18nAttributes config instruction, whereas the target is the ElementCreate that hosts the attribute.
This refactor makes the code clearer in quite a few plases.
Additionally, we now perform a lot of the i18n processing earlier. For example, re-targeting and re-ordering of i18n expressions happens *before* apply instructions are generated. As a result, the re-ordering logic is a lot simpler.
These changes also have consequences on i18n const collection, along with a couple other minor changes.
PR Close#53376
These changes add an option to the `extendedDiagnostics` field that allows the check from #53190 to be disabled. This is a follow-up based on a recent discussion.
PR Close#53311
Add support for i18n attributes:
- Generate i18n contexts from i18n attributes, and extract the eventual messages into the constant pool.
- Emit I18nAttributes config instructions when needed.
- Use the generated i18n variable in the appropriate places, including extracted attribute instructions, as well as I18nAttributes config arrays.
PR Close#53341
Currently we generate the following TCB for a `@for` loop:
```ts
// @for (item of items; track item) {...}
for (const item of this.items) {
var _t1 = item;
// Do things with `_t1`
}
```
This is problematic if the item name is the same as a global variable (e.g. `document`), because when the TCB has references to that variable (e.g. `document.createElement`), it'll find the loop initializer instead of the global variable.
These changes fix the issue by generating the following instead:
```ts
for (const _t1 of this.items) {
// Do things with `_t1`
}
```
Fixes#53293.
PR Close#53319
Previously we recorded separate param values for a strucural directive
and the element tag it goes on. We then later attempted to combine those
into a single value. However in some cases this merging logic matched
the directive with the wrong tag.
This change implements an alternate approach where we match the
directive to its element tag from the start, while we're traversing the
ops. This should be a more robust solution.
PR Close#53327
We previously failed to populate the attributes property on projection
ops, this commit populates it and later strips out the "select"
attribute.
PR Close#53327
Previously we failed to reset the sub-template index counter when we
exited a root block. This caused following sibling blocks to start
counting at the wrong index.
PR Close#53327
It is possible for ICUs to be nested inside other ICUs. This change
adjusts our ingestion logic to create extra interpolation ops for the
nested ICUs during ingestion.
PR Close#53300
We previously had an assertion that every placeholder in the i18n AST
had a corresponding param in the output. However, there are some cases
such as interpolations nested inside ICUs where this assertion is not
true. This change simply removes the asserion.
PR Close#53300
ICUs may share a placeholder, and in that case they need special
post-processing. This change adds logic to cover this possibility. In
particular, we set the param to a special placeholder value and then
pass an array containing the sub-message variables as a post-processing
param.
PR Close#53300
When we re-assign the slot dependencies for the i18nExprs, we should
move them down below the other ops that target their same slot. This
keeps the behavior consistent with TDB
PR Close#53300
When the AOT compiler creates a delegated host for a provided TypeScript CompilerHost,
it delegates functionality back to the original via a series of internal method delegations.
However, unlike other members of the CompilerHost, `jsDocParsingMode` is not a method
and cannot be delegated in this way. Attempting to call bind on the property will result
in a runtime error. Instead, `jsDocParsingMode` is now delegated via get/set accessors.
Additionally, the override of `getSourceFile` now has an updated type signature to reflect
the additional of the `jsDocParsingMode` option for the method.
This is a followup to #53126 which updates the other DelegatingCompilerHost.
PR Close#53292
This commit fixes an issue where having an expression with nullish coalescing in styling host bindings leads to JS errors due to the fact that a declaration for a temporary variable was not included into the generated code.
Resolves#53295.
PR Close#53305
As part of this fix, I realized that child i18n blocks don't need their
own context. Instead, we can just add their params directly to the
context for their root block, and forgo the step of merging the contexts.
PR Close#53209
ICU sub-messages should be recorded as belonging to the message for the
root i18n block they are part of. This ensures that they still get
emitted even if they are nested in a child template.
PR Close#53209
This is a follow-up to the fix from #52414. It adds a diagnostic that will tell users when a control flow is preventing its direct descendants from being projected into a specific component slot.
PR Close#53190
These changes expose the `ngContentSelectors` and `preserveWhitespaces` metadata to the TCB so they can be used in the next commit to implement a new diagnostic.
PR Close#53190
When the AOT compiler creates a delegated host for a provided TypeScript CompilerHost,
it delegates functionality back to the original via a series of internal method delegations.
However, unlike other members of the CompilerHost, `jsDocParsingMode` is not a method
and cannot be delegated in this way. Attempting to call bind on the property will result
in a runtime error. Instead, `jsDocParsingMode` is now delegated via get/set accessors.
Additionally, the override of `getSourceFile` now has an updated type signature to reflect
the additional of the `jsDocParsingMode` option for the method.
PR Close#53126
Adds support for inheriting host directives from the parent class. This is consistent with how we inherit other features like host bindings.
Fixes#51203.
PR Close#52992
This is a follow-up to the fix from #52414. It adds a diagnostic that will tell users when a control flow is preventing its direct descendants from being projected into a specific component slot.
PR Close#52726
These changes expose the `ngContentSelectors` and `preserveWhitespaces` metadata to the TCB so they can be used in the next commit to implement a new diagnostic.
PR Close#52726
The `$first`, `$last`, `$even` and `$odd` variables in `@for` loops aren't defined on the template context of the loop, but are computed based on `$index` and `$count` (e.g. `$first` is defined as `$index === 0`). We do this calculation by looking up `$index` and `$count` when one of the variables is used.
The problem is that all `@for` loop variables are available implicitly which means that when a nested loop tries to rewrite a reference to an outer loop computed variable, it finds its own `$index` and `$count` first and it doesn't look up the ones on the parent at all. This means that the calculated values will be incorrect at runtime.
These changes work around the issue by defining nested-level-specific variable names that can be used for lookups (e.g. `$index` at level `2` will also be available as `ɵ$index_2`). This isn't the most elegant solution, however the `TemplatDefitinionBuilder` wasn't set up to handle shadowed variables like this and it doesn't make sense to refactor it given the upcoming template pipeline.
Fixes#52917.
PR Close#52931
Reworks the `repeater` instruction to go through `advance`, instead of passing in the index directly. This ensures that lifecycle hooks run at the right time and that we don't throw "changed after checked" errors when we shouldn't be.
Fixes#52885.
PR Close#52935
In some cases ICU expression placeholders may have trailing spaces that
need to be trimmed when matching the placeholder to its corresponding
text binding.
PR Close#52698
We were previously counting the i18n expression index and deciding when
to apply i18n expressions based on the i18n context. These should be
done based on the i18n block instead.
PR Close#52698
The previous commit added support for interpolated text in ICUs, but it
made the assumption that the interpolation would be a single variable
read expression.
To properly support all kinds of interpolation expressions, this commit
refactors how ICUs are ingested to allow us to re-use the same logic we
use for bound text outside of ICUs.
To accomplish this, the `IcuOp` creation op has been removed in favor of
a pair of ops: `IcuStartOp` and `IcuEndOp`, that mark the beginning and
end of the ICU. Now, instead of inserting an `IcuUpdateOp` in the update
IR, we call `ingestBoundText` and use the presence of the surrounding
`IcuStartOp` and `IcuEndOp` to match the interpolation with the ICU.
PR Close#52698
Previously ICUs were assumed to only generate a single i18n expression
per ICU. However, it is possible for ICUs to contain text interpolations
which requires additional expressions. This commit adds support for
multiple expressions per ICU.
PR Close#52698
ICUs that contain element tags need extra parameters for the i18n
message. These are in addition to the element slot params that are
already added to the parent i18n block's params. In this commit we add a
new phase to fill in these placeholders.
PR Close#52698
Previously the template pipeline sorted i18n message params before
adding the sub-message placeholders. Now its sorts after all
placeholders are added.
Both the template pipeline and TemplateDefinitionBuilder previously
failed to sort the post-processing params. They both now sort these as
well. This is safe to change in TemplateDefinitionBuilder, as it does
not change anything about the functionality, it simply ensures that
params map in the output has the keys ordered in a way that can be
easily reproduced in the template pipeline.
PR Close#52698
Updates the repo to support TypeScript 5.3 and resolve any issues. Fixes include:
* Updating usages of TS compiler APIs to match their new signatures.
* In TS 5.3 negative numbers are represented as `PrefixUnaryExpression` instead of `NumericExpression`. These changes update all usages to account for it since passing a negative number into the old APIs results in a runtime error.
PR Close#52572
Fixes that all implicit variables in `@for` loops were inferred to be numbers, even though most are actually boolean.
Note that I also had to work around a weird TypeScript behavior in `tsDeclareVariable` where usually we declare variables in the following format:
```
var _t1: <type> = null!;
```
This works in most cases, but if the type is a `boolean`, TypeScript infers the variable as `never`, instead of `boolean`. I've worked around it by adding an `as boolean` to the initializer.
Fixes#52730.
PR Close#52732
Adds the private `_enableBlockSyntax` flag that can be used by the language service to disable blocks on apps that aren't on Angular v17.
PR Close#52683
Now that two-way bindings work correctly with implicit receivers, we can fix the corresponing source map tests. The main issue was that we were not properly mapping `elementEnd` for elements with no closing tag (self-closing elements).
PR Close#52479
Some two-way bindings tests were not working properly, because we could not ingest the implicit receiver required to write to the `ngModelChanges` property. Now, we properly resolve that implicit receiver to the root component context.
Also, add some tests, both for the simple case, and the case where the listener is inside a nested view.
PR Close#52479
Some `defer` blocks have external dependencies on other components or directives. These dependencies need to be extracted into deps functions, which either return local deps, or use a dynamic import for non-local deps. Template Pipeline can now generate these functions.
PR Close#52479
When an `ng-template` has local refs, such as `<ng-template #foo>`, we must emit a `ɵɵtemplateRefExtractor` argument to the template creation functino. The template pipeline now supports this.
PR Close#52479
`TemplateDefinitionBuilder` is somewhat unreliable about extracting constant attributes (e.g. `[attr.foo]="'one'"`). It never extracts const non-string expressions, and usually, but not always, extracts const string expressions. Template pipeline consistently extracts const strings, and we add new goldens for a couple such cases.
PR Close#52479
Some defer triggers, such as `hover`, expect a local reference as an argument. For example, `@defer (on hover(target))` waits until the user hovers over the target.
However, these defer conditions also have a nullary form, in which the trigger is implicitly the first element in the placeholder block. We now support that case in template pipeline.
PR Close#52479
We already supported `defer on` conditions, which become instructions in the create mode block.
Now, we also support `defer when` conditions, where are very similar, with the notable difference that they go in the update block (because a user-supplied condition must be re-evaluated on each update.)
PR Close#52479
Previously we supported ICUs where the ICU itself represetned the entire
translated message. This change allows ICUs to act as a sub-message
inside other translated messages.
PR Close#52503
Discovered this while validating #52414 against Angular Material. We were projecting `<ng-template>` nodes at the root of `@if` and `@for` with the `ng-template` tag name which enables directive matching and applies the directive to the control flow node.
These changes fix the issue by never passing along the `ng-template` tag name.
PR Close#52515
TypeScript JsDoc parsing, by default, treats occurences of Angular decorators (e.g. `@Component`) in JsDoc comments as JsDoc tags. This commit escapes these decorator strings by copying the raw JS doc onto a dummy symbol in a new SourceFile to make TypeScript re-parse the comment.
PR Close#52481
This adds a target to generate a manifest of all public api symbols. The majority of inputs are generated from the extraction rules, but API entries that don't have a TypeScript source symbol (elements and blocks) are defined in hand-written json collections.
PR Close#52472
With the directive-based control flow users were able to conditionally project content using the `*` syntax. E.g. `<div *ngIf="expr" projectMe></div>` will be projected into `<ng-content select="[projectMe]"/>`, because the attributes and tag name from the `div` are copied to the template via the template creation instruction. With `@if` and `@for` that is not the case, because the conditional is placed *around* elements, rather than *on* them. The result is that content projection won't work in the same way if a user converts from `*ngIf` to `@if`.
These changes aim to cover the most common case by doing the same copying when a control flow node has *one and only one* root element or template node.
This approach comes with some caveats:
1. As soon as any other node is added to the root, the copying behavior won't work anymore. A diagnostic will be added to flag cases like this and to explain how to work around it.
2. If `preserveWhitespaces` is enabled, it's very likely that indentation will break this workaround, because it'll include an additional text node as the first child. We can work around it here, but in a discussion it was decided not to, because the user explicitly opted into preserving the whitespace and we would have to drop it from the generated code. The diagnostic mentioned point #1 will flag such cases to users.
Fixes#52277.
PR Close#52414
Prior to this change, the transform function would be referenced with a potentially
relative import into an external declaration file. Such imports are not portable
and should not be created in this context. This commit addresses the issue by threading
though the originally used module specifier by means of the `Reference` type.
Fixes#52324
PR Close#52437
This commit fixes an issue where using literal types in the arguments of an input coercion
function could result in emitting invalid output, due to an assumption that TypeScript makes
when emitting literal types. Specifically, it takes the literal's text from its containing
source file, but this breaks when the literal type node has been transplanted into a
different source file. This issue has surfaced in the type-check code generator and is
already being addressed there, so this commit moves the relevant `TypeEmitter` class
from the `typecheck` module to the `translator` module, such that it can be reused for
emitting types in the type translator.
Fixes#51672
PR Close#52437
The previous commits provided the scaffolding for `defer on`. In this commit, we build on that work, adding triggers for `immediate`, `timer`, `hover`, and `viewport`.
PR Close#52387
Previously, we supported a `HasConst` trait, allowing an op to be const collected automatically. However, that approach had the shortcoming that each op could only collect a single constant.
Instead, we now provide a `ConstCollectedExpr`, which collects constants at the expression level, allowing ops to have multiple collectible consts.
Then, we use this new abstraction to support the `defer on` conditions.
PR Close#52387
Previously, we had an "empty shell" implementation of defer conditions, and we used separate ops to represent secondary defer blocks.
Now, we have a real scaffolding for supporting the various defer conditions, and the secondary defer block information has been refactored onto the main defer op.
Additionally, to enable this, we refactor the way that using slot indices works. Instead of having a trait that causes users of slot indices to be linked to the allocated slot, we share a single `SlotHandle` object by reference. This allows an op to use slot information for more than one Xref at a time, and eliminates a layer of indirection.
Co-authored-by: Alex Rickabaugh <alxhub@users.noreply.github.com>
PR Close#52387
Enables a handful of i18n tests that are currently skipped, but pass if
enabled. Some of them require alternate golden files because of
inconsequential differences in the cost array order.
PR Close#52390
This commit expands docs extraction for classes and interfaces to include inherited members. This relies on the type checker to get the _resolved_ members of the type so that the extractor doesn't need to reason about inheritance rules, which can get tricky (especially with regards to method overloads).
PR Close#52389
This commit adds decorators to the extracted API docs. It makes some
very hard-coded assumptions about the pattern used to declare decorators
that's extremely specific to what the framework does today.
PR Close#52389
Previously, we would emit *two* pipe creation instructions for each pipe in a switch case. This is because we were visiting both the transformed and raw versions of the pipe bindings.
Now, we clear the raw case expressions array after generating the transformed test expression.
Also, we introduce some new goldens, because our pipe creation order is harmlessly different.
PR Close#52289
We roughly attempt to match TemplateDefinitionBuilder's pipe creation order, by placing pipe creation instructions after their target elements. However, we cannot fully emulate the "inside-out" ordering TemplateDefinitionBuilder uses when multiple pipes apply to one element, because TemplateDefinitionBuilder creates the pipes as expressions are visited, from the leaves up. Our order is perfectly adequate though.
We also add a non-compatibility-mode ordering, which just appends them to the end of the create block. This is better because it allows for more chaining opportunities.
PR Close#52289
Singleton property interpolation instructions consume only one variable, but are still emitted as an interpolation instruction (they cannot be collapsed because `propertyInterpolate` implicitly stringifies its argument.)
PR Close#52289
We were incorrectly emiting a extracted constant pool index for the final argument of the projection instruction. It actually takes an array literal.
(N.B.: This means we re-create the array every time! We should probably modify the runtime to use a const index for this.)
Additionally, we alter the projection op to not extend the element op base type.
PR Close#52289
The correct order of attributes and properties is:
1. Interpolated properties
2. Interpolated attributes
3. Non-interpolated properties
4. Non-interpolated attributes
This includes an additional nuance: singleton attribute interpolations, such as `[attr.foo]="{{bar}}"`, will be "collaped" into a simple `attribute` instruction. However, this is *not* the case for singleton property interpolations! The ordering phase must take this nuance into account to match the TemplateDefinitionBuilder order.
After the project lands, it might be nice to also collapse singleton property interpolations.
PR Close#52289
Previously, we ran the ordering phase near the end of the compilation. However, this meant that phases like slot assignment and variable offset assignment would happen first, and then the nice, monotonically-increasing orders would be scrambled by the reordering.
It's much more intelligible to order first, and then perform these assignments. However, to make this happen, some modifications to the ordering phase are required. In particular, we can no longer rely on `advance` instructions to break up orderable groups.
PR Close#52289
Many instructions consume variable slots, which are used to persist data between update runs. For top-level instructions, the offset into the variable data array is implicitly advanced, because those instructions always run.
However, instructions in non-top-level expressions cannot be assumed to run every time, because they might be conditionally executed. Therefore, they cannot implicitly advance the offset into the variable data, and must be given an explicitly assigned variable offset.
TemplateDefinitionBuilder assigned offsets top-to-bottom for all instructions *except* pure functions. Pure functions would be assigned offsets lazily, on a second pass.
Template Pipeline can now imitate this behavior, when in compatibility mode: pure functions are assigned offsets on a second pass.
This also makes the "variadic var offsets" phase unnecessary -- the new approach is more general and correct.
PR Close#52289
Previously, inside an event listener, template pipeline would always save the context from restoring a view, e.g.
```
const restored_ctx = r0.ɵɵrestoreView(s);
```
This is usually correct! However, consider the case of a listener in the template's root view. The appropriate context will already be available via closure capture, and we can just use it (as `ctx`).
Now, the context resolution phase understands that we don't need to use the restored view's saved context if we would have access to it by closure.
Note: we also create a new golden, because the const array is in a harmlessly different order.
PR Close#52289
Previously, the template pipeline did not handle "empty" reads gracefully: it would emit syntactically invalid reads of empty properties. Now we read `$implicit`.
This allows us to enable a test that relies on `$implicit`. However, we also have to create another golden, because our variable inlining is more aggressive.
PR Close#52289
We currently allow elements to be collapsed around pipe creation instructions. TemplateDefinitionBuilder disallows this, but only sometimes. Collapsing in this case is actually less generated code, and it's OK to allow it.
PR Close#52289
The template pipeline can now generate track functions, and extract them into the constant pool (or optimize them if needed). Additionally, context variables such as `$index` can be used inside track functions and for loop bodies.
PR Close#52001
Add support for `repeaterCreate` and `repeater` instructions. Correctly count decls and vars, and support primary and empty blocks.
`track` functions are not yet extracted.
PR Close#52001
In #52110 the compiler was changed to produce `if` statements when type checking `@switch` in order to avoid a bug in the TypeScript compiler. In order to avoid duplicate diagnostics, the main `@switch` expression was ignored in each of the `@case` comparisons. This appears to have caused a regression where comparing incompatible types wasn't being reported anymore.
These changes resolve the issue by wrapping the expression in parentheses which allows the compiler to report comparison diagnostics while ignoring diagnostics in the expression itself.
Fixes#52315.
PR Close#52322
Now the method `getConstructorDependencies` no longer needs to do any post analysis, and can rely on the reflection host's result to generate ctor params. This will automatically include invalid factories which fix the issue.
PR Close#52215
Currently the reflection host's `getConstructorParameters` method is not aware of the compilation mode, and it generates result mainly assuming the compilation mode is full and we have access to global type info. As a result, its result is not very suitable for local compilation usage, particularly for deciding if a symbol is imported as type or not. This change plumbs a flag `isLocalCompilation` into reflection host to make it aware of the compilation mode.
Also changes made to the logic in the method `getConstructorParameters` so that in local compilation mode:
- returns NO_VALUE_DECLARATION type value ref only if the type is a type parameter
- returns local type value ref for any imported symbol, unless the import is type only in which case returns TYPE_ONLY_IMPORT type value ref
PR Close#52215
The commit adds messaging to the control flow template diagnostic to direct developers to the new
built-in control flow syntax in Angular.
PR Close#52268
ICUs can be used outside of an i18n block. In this case the ICU should
be automatically wrapped in a new i18n block. This commit adds a new
phase to handle wrapping these bare ICUs.
PR Close#52250
ICU params in i18n messages are now resolved in the post-processing call
rather than in the initial message creation. This matches the output
generated by TemplateDefinitionBuilder.
PR Close#52250
ICUs are now ingested by adding ops to both the creation and update IR.
Both of these ops are ultimately removed before reification, but they
are needed to coordinate and link data between the creation and update
ops. This is done in a new ICU extraction phase that removes both ICU
ops and adds an i18nExpr op to the update IR.
PR Close#52250
This commit extracts the API reference info for generic parameters for
classes, methods, interfaces, and functions. It includes any constraints
and the default type if present.
PR Close#52204
Placing a structural directive on an element with an `i18n` attribute
was generating too many i18n blocks. This was due to both the element
and the template generating their own i18n block. To fix the issue, we
no longer generate top-level i18n blocks for structural directive
templates.
PR Close#52202
Structural directives on an ng-template (e.g. <ng-template *ngIf>) were
being assigned the wrong tag name ('ng-template' instead of null).
PR Close#52202
Fixes handling of placeholders for self-closing tags. Self-closing tags
set a combined value for the start tag placeholder, rather than separate
values for the start and close placeholders.
This commit also enables a number of now passing tests. For some of
these tests I had create a separate golden file due to the different
ordering of the const array. In the template pipeline, i18n and
attribute const collection happen in different pahses and we therefore
get a different order than TemplateDefinitionBuilder, which collected
everything in one pass. The order should not affect the overall behavior.
PR Close#52195
The way we were propagating params up to parent i18n ops didn't account
for the fact that a parent and child could both have a value for the
same placeholder. In order to properly merge the value for these cases,
we need to propagate the params up *before* serialization. Therefore I
removed the standalone param propagation phase and folded the logic into
the placeholder resolution phase.
PR Close#52195
Currently the compiler allocates a variable slot to the `@for` loop expression which ends up unused since we don't store the result on the `LView`.
PR Close#52158
A new flag added to the component's debug info to determine whether to throw runtime error (in dev mode) if component is being rendered without its NgModule. This flag is only set for non-standalone components.
PR Close#52061
Orphan component is an anti-pattern in Angular where a component is rendered while the NgModule declaring it is not installed. It is not easy to capture this scenario, specially in compile time. But it is possible to capture a special case in runtime where the component is being rendered without its NgModule even loaded into the browser. This change adds a flag in cli compiler option to enable such checking, and throwing a runtime exception if it happens. Note that such check is only done in dev mode.
Currently the check requires some generated code that is behind ngJitMode flag (i.e., call to ɵɵsetNgModuleScope), and the new flag can be set only if JIT mode is enabled (i.e., supportJitMode=true) otherwise an error will be thrown.
The orphan component is a main blocker for rolling out local compilation in g3. This option is needed for identifying and isolating such cases.
PR Close#52061
Based on recent discussions, these changes remove the Windows CI check because it has been too flaky for too long. Furthermore, we've concluded that the simulated file system in the compiler tests already catches the same set of bugs as running the tests on a real Windows system.
PR Close#52140
This commit adds support for extracting type alises. It currently
extracts the raw written type from the source without performing any
resolution, such as for resolving `typeof` queries, as current Angular
public APIs do not rely on this.
PR Close#52118
Fixes that the new block syntax was generating instructions in the wrong order which meant that pipes were being declared too early. This meant that if the block is first in the template, any pipes used in it won't be able to inject things like `ChangeDetectorRef`.
These changes update the compiler and add a bunch of tests to ensure that pipes work as expected.
Fixes#52102.
PR Close#52112
Since expressions in event listener are added inside of a callback, type narrowing won't apply to them anymore. These changes add the logic to create a guard expression that will re-narrow the expression in the callback.
Fixes#52052.
PR Close#52069
Since expressions in event listener are added inside of a callback, type narrowing won't apply to them anymore. These changes add the logic to create a guard expression that will re-narrow the expression in the callback.
Fixes#52052.
PR Close#52069
This commit updates `@defer` logic related to handling `after` and `minimum` parameters tree-shakable.
If `after` or `minimum` was used on a `@loading` or `@placeholder` blocks, compiler generates an extra argument for the `ɵɵdefer` instruction. This extra argument is a reference to a function that brings timer-related code.
PR Close#52042
A new statement will be generated for components which will attach some useful debug info to them to be used in runtime error handling. Currently this only happens in full and local compilation modes.
PR Close#51919
The current implementation assumes a qualified name consists of just two identifier, e.g., Foo.Bar. However it can be more nested, like Foo.Bar.Baz.XX.YY. While such nested patterns are quite uncommon and devs mostly just use two identifier here, the TS compiler seems to throw error if we make such assumption and it broke quite a lot of targets in g3 when compiled in local mode. So here we handle this nested property of qualified names.
PR Close#51947
The custom logic in the generate advance phase for i18n expressions did
not work in all cases. Instead we add a new phase to update the
expression's target op, and then allow the standard advance generation
code to determine the number of advance instructions needed.
Co-authored-by: Dylan Hunn <dylhunn@users.noreply.github.com>
PR Close#51988
This commit adds support for extracting function overloads. Interestingly, this worked in an earlier version when the code was extracting all statements in every source file, but the existing compiler API for extracting all exported declarations from an entry-point only returns the first function declaration in cases when there are overloads.
This also marks abstract classes as abstract, required inputs as required, and filters out Angular-private APIs.
PR Close#52040
We type check `@switch` blocks by generating identical TS `switch` statements in the TCB, however TS currently has a bug where parenthesized `switch` block expressions don't narrow their types. Since we use parenthesized expressions to wrap AST nodes for diagnostics, this will bug will affect all Angular-generated `switch` statements.
These changes work around the issue by generating `if`/`else if`/`else` statements that represent the `switch`.
Some alternatives that were considered:
1. Moving the `switch` expression to a constant - this is fairly simple to implement, but it won't fully resolve the narrowing issue since the same constant will have to be used in expressions inside the different cases.
2. Removing the outer-most parenthesis from the switch expression - this works and allows us to continue using switch statements, but because we use parenthesized expressions to map diagnostics to their template locations, I wasn't sure if it won't lead to worse template dignostics.
Fixes#52077.
PR Close#52110
Fixes that the compiler wasn't picking up pipes used inside defer block triggers as dependencies. We had implemented the `visitDeferredTrigger` visitor method, but it wasn't being called, because we weren't going through the `visitAll` method of the deferred block. We don't use `visitAll`, because child nodes have to be processed differently than the connected blocks and triggers.
Fixes#52068.
PR Close#52071
The `_enabledBlockTypes` config option was removed recently, since we've enabled @-syntax by default. This commit removes `_enabledBlockTypes` references from the `compiler-cli` test cases.
PR Close#52066
Adds an `UnknownBlock` node to the Ivy AST to represent blocks that haven't been recognized by the compiler. This will make it easier to integrate blocks into the language service.
PR Close#52047
This adds API doc extraction for interfaces, largely using the same code paths for classes. The primary difference between classes and interfaces is that classes have member _declarations_ while interfaces have member _signatures_. This largely doesn't matter for the purposes of extraction, but the types are distinct with no common base types, so we have to do a fair amount of type unioning and aliasing.
PR Close#52006
A couple tests were already passing, and just needed to be enabled. This includes tests pertaining to:
* ng-template
* host binding styling slots
* and host animation bindings
* some literal tests (which were missing some $foo$ escaped names)
We add pipeline-specific versions of the following tests, and enable them:
* A local refs test. The consts for the element attributes and the consts for local reference are collected in the reverse order, but the emitted template is functionally the same.
* A safe accesstest. Consider the expression `$any(val)?.foo`. `TemplateDefinitionBuilder` extracts a temporary variable: `($tmp_0_0$ = $ctx$.val) == null ? null : $tmp_0_0$.foo`. It presumably does this because it considers the `$any(...)` to be a function call. However, this is not a real call, so Template Pipeline safely ignores it and declines to generate a temporary.
* Another local refs test. AttributeMarker.Template is emitted at the end of the const array (instead of the middle)
PR Close#51950
Consider an `ng-template` which is generated as a result of a structural directive:
```
<div *ngFor="let inner of items"
(click)="onClick(inner)"
[title]="getTitle()"
>
```
This should logically expand into something like the following:
```
<ng-template [ngForOf]="..." >
<div (click)="..." [title]="..."></div>
</ng-template>
```
Note that the `(click)` handler and the `[title]` property are only present on the inner div, *not* on the enclosing generated `ng-template`.
Previously, Template Pipeline would place these bindings on *both* the tempate and the inner element.
However, we can't just remove them completely, because these bindings should still be matchable on the generated `ng-template` (which is very surprising, but nonetheless true).
We resolve this issue with two improvements:
(1) The ingestion step is now much smarter about determining not only if a binding is on a template element, but whether it actually targets that template element.
(2) We use `ExtractedAttributeOp` directly, rather than going through `BindingOp`, to cause the `ng-template` to still receive these bindings in its `consts` array for matching purposes.
PR Close#51950
For components, the parser already extracts the `important` property (and it is later disregarded). However, because host bindings use a totally separate parsing code path, this was never happing for host bindings.
Here, we add some code to the host style parsing phase to drop the `!important` suffix.
We could solve this category of problems for good by parsing host bindings with the same code as template bindings.
PR Close#51950
Previously, we always generated temporary variable declarations at the beginning of each view's update block. This is wrong, for two reasons:
1. Temporaries can be used in the create block
2. When listeners use temporaries, we should declare them inside the listener.
Now, we always place temporaries at the beginning of the enclosing OpList, and recursively try to generate them when we find a listener.
PR Close#51950
Currently the TCB for aliased `if` blocks looks something like this:
```
// Markup: `@if (expr; as alias) { {{alias}} }
if (block.condition) {
var alias = block.condition;
"" + alias;
}
```
The problem with this approach is that the type of `alias` won't be narrowed. This is something that `NgIf` currently supports.
These changes resolve the issue by emitting the variable outside the `if` block and using the variable reference instead:
```
// Markup: `@if (expr; as alias) { {{alias}} }
var alias = block.condition;
if (alias) {
"" + alias;
}
```
PR Close#51952
Reworks a few more places to output arrow functions instead of function declarations in order to reduce the amount of code we generate. Some of these places include:
* Factories in injectable definitions.
* Forward references.
* `dependencies` function in the component definition.
* `consts` function in the component definition.
PR Close#52010
Updates the TCB for `@for` loop blocks to allow nullable values. The runtime already supports it and this makes it easier to switch from `NgFor`.
Fixes#51993.
PR Close#51997
The template pipeline now supports basic forms of `defer` blocks. This includes the `loading`, `placeholder`, and `error` blocks, as well as the loading and placeholder configuration options.
Lazy dependencies and prefetch are not yet implemented.
PR Close#51942
Enables the new `@` block syntax by default by removing the `enabledBlockTypes` flags. There are still some internal flags that allow special use cases to opt out of the block syntax, like during XML parsing and when compiling older libraries (see #51979).
PR Close#51994
Increases the `minVersion` of component declarations that use bloks to v17 in order to indicate to users that they need to update if the library they're using is on the new syntax, while preserving backwards compatibility for libraries that do not use the syntax.
PR Close#51979
Adds some logic to enable parsing of block syntax in the linker. Note that the syntax is only enabled on code compiled with Angular v17 or later.
PR Close#51979
We were previously emitting pure functions as `function foo(args) {return bar;}`, but `TemplateDefinitionBuilder` uses arrow functions instead (`const foo = (args) => bar`). By matching this behavior, we can enable many additional tests.
PR Close#51961
This is a deceptively simple fix for a deep issue. Consider the following template:
```
<button [title]="myTitle" [id]="(auth().identity() | async)" [tabindex]="1">
```
`TemplateDefinitionBuilder` allocates the following variable (binding) slots:
v[0] = [title] binding
v[1] = [id] binding
v[2] = [tabindex] binding
v[3] = pipe binding
v[4] = pipe binding
As you can see, all three top-level property bindings were assigned variable indices. Then, variables for nested expressions were assigned.
Before this change, Template Pipeline would choose the following order:
v[0] = [title] binding
v[1] = [id] binding
v[2] = pipe binding
v[3] = pipe binding
v[4] = [tabindex] binding
With this order, nested expressions have their variables counted and assigned before subsequent top-level property bindings. This results in different variable indices for `pipeBinding` expressions that are not inside the final property binding.
However, this is not just different -- it's actually incorrect! Consider a case like the following:
```
<button [p1]="c ? (a | pipe) : 3" [p2]="b | pipe">
```
These pipe bindings are executed *conditionally*. This means that, because we don't count and assign all the "fixed" variable slots first, i.e. those belonging to the property bindings, their indices might end up incorrect, depending on whether or not a pipeBinding happened as part of the update block.
With this change, we count all variables on top-level ops first, and then descend into all expressions.
PR Close#51961
An `if` block can specify an alias for its main expression. We now support these in the template pipeline:
- We generate a temporary variable for the original expression
- We pass the temporary to the `conditional` instruction's context argument
- We provide the alias's name in the ambient context variables map
The context variables map now also accepts a name whose lookup value on the context object is empty. This will be interpreted as a read of the entire context object.
PR Close#51931
This entails adding a bit of extra logic to the existing conditional ingestion and corresponding phase, because `if` blocks lack a test expression.
Additionally, enable a couple more `switch` tests by resolving a curious issue -- we now consume a variable for conditionals.
PR Close#51931
Adds support for i18n expressions in i18n messages, and allows i18n
messages on templates.
Co-authored-by: Alex Rickabaugh <alxhub@users.noreply.github.com>
Co-authored-by: Dylan Hunn <dylhunn@users.noreply.github.com>
PR Close#51876
Adds support for defining `viewport`, `interaction` and `hover` triggers with no parameters. If the framework encounters such a case, it resolves the trigger to the root element of the `@placeholder` block. Triggers with no parameters have the following restrictions:
1. They have to be placed on an `@defer` block that has an `@placeholder`.
2. The `@placeholder` can only have one root node.
3. The root placeholder node has to be an element.
PR Close#51922
If a trigger element can't be accessed from the defer block, we don't generate any instructions for it. These changes add a diagnostic that will surface the error to users.
PR Close#51922
Changes `TemplateDefinitionBuilder` to output i18n message parameters in
sorted order to make it easier for the template pipeline to generate
identical output. This does not result in any functional change, but
will make it much easier to shared output golden files with the template
pipeline.
PR Close#51911
Fixes that we were allocating slots for the expressions of `if`, `else if`, `switch` and `case` blocks which we weren't using for anything.
PR Close#51913
Currently the field encapsulation undergoes some static analysis to check if it is `ViewEncapsulation` enum. Such static check fails in local compilation mode in g3 as the symbol cannot be resolved. On the other hand this field has to be resolved statically as its value determined the generated code. So in local compilation mode we add a lighter resolving logic which relies only on local information.
PR Close#51848
Currently the field changeDetection undergoes some static analysis to check if it is `ChangeDetectionStrategy` enum. Such static check fails in local compilation mode in g3 as the symbol cannot be resolved. So in local compilation mode we bypass such resolving and just write the expression as is into the component definition.
PR Close#51848
Switches the syntax for blocks from `{#block}{/block}` to `@block {}` based on the feedback from the community.
Read more about the decision-making process in our blog: https://blog.angular.io/meet-angulars-new-control-flow-a02c6eee7843
The existing block types changed in the following ways:
**Conditional blocks:**
```html
<!-- Before -->
{#if cond}
Main content
{:else if otherCond}
Else if content
{:else}
Else content
{/if}
<!-- After -->
@if (cond) {
Main content
} @else if (otherCond) {
Else if content
} @else {
Else content
}
```
**Deferred blocks**
```html
<!-- Before -->
{#defer when isLoaded}
Main content
{:loading} Loading...
{:placeholder} <icon>pending</icon>
{:error} Failed to load
{/defer}
<!-- After -->
@defer (when isLoaded) {
Main content
} @loading {
Loading...
} @placeholder {
<icon>pending</icon>
} @error {
Failed to load
}
```
**Switch blocks:**
```html
<!-- Before -->
{#switch value}
{:case 1}
One
{:case 2}
Two
{:default}
Default
{/switch}
<!-- After -->
@switch (value) {
@case (1) {
One
}
@case (2) {
Two
}
@default {
Default
}
}
```
**For loops**
```html
<!-- Before -->
{#for item of items; track item}
{{item.name}}
{:empty} No items
{/for}
<!-- After -->
@for (item of items; track item) {
{{item.name}}
} @empty {
No items
}
```
PR Close#51891
Reworks the `setClassMetadata` calls to generate arrow functions instead of full anonymous function declarations. While this won't have an effect on production bundle sizes, it's easier to read and it should lead to small parsing time gains in dev mode.
PR Close#51637
Adds support for `on viewport` and `prefetch on viewport` triggers which will load the deferred content when the element comes into the view.
PR Close#51874
Adds support for `on hover` and `prefetch on hover` triggers. Some code had to be moved around so it could be reused from the `on interaction` triggers.
PR Close#51874
Updates the logic that generates the instructions for the `on interaction` and `prefetch on interaction` triggers to their final shape. Now the instructions take two arguments:
1. `triggerIndex` - index at which to find the trigger in the view where it will be rendered.
2. `walkUpTimes` - tells the runtime how many views up it needs to go to find the trigger element. If the argument is omitted, it means that the trigger is in the same view as the deferred block. A positive number means that the runtime needs to go up X amount of times to find the trigger. A negative number means that the trigger is inside the root view of the placeholder block. Negative numbers are capped at -1 since the placeholder is always in the same position at runtime.
PR Close#51830
Reworks the compiler to use the API introduced in #51816 to match triggers to the element nodes they point to. This will be used to generate the new instructions for `on interaction` and `prefetch on interaction`.
PR Close#51830
So far this docs extraction has pulls API info from all exported symbols in the program. This commit changes to extracting only symbols that are exported via a specified entry-point. This commit also exports the docs entities through the compiler-cli `index.ts`.
PR Close#51828
Currently the compiler in local mode assumes that the standalone component imports are array expressions. This is not always true as they can be const variables as well. This change allow non-array expressions for standalone component imports field and passes that expression to the downstream tools such as deps tracker to compute the component's deps in runtime.
PR Close#51819
Current implementation assumes that NgModule imports/exports fields are always arrays and thus it concats them for the injector definition. But this is not always the case and imports/exports could be non-arrays such as const variable. Such pattern happens in g3 and so must be addressed.
PR Close#51819
Adds support for template type checking of the `track` expression of a `for` loop block. Tracking expressions are treated as any other expression for type checking, however we have some special validation that doesn't allow them to access template variables and local references.
PR Close#51690
Adds support for template type checking inside `for` blocks. It is implemented by generating a JS `for...of` statement inside the TCB. The various loop variables (e.g. `$index`) are implemented by declaring a local number variable.
PR Close#51690
Adds support for template type checking inside `if` blocks. It is implemented by generating a JS `if` statement inside the TCB which allows us to do type narrowing of the expression. The `as` parameter is implemented by declaring a variable inside the `if` statement.
PR Close#51690
Adds support for template type checking inside `switch` blocks. It is implemented by generating a JS `switch` statement inside the TCB which allows us to do type narrowing of the expression.
PR Close#51690
When the `TargetBinder` was written, the only embedded-view-based nodes were templates, but now we have `{#if}`, `{#switch}` and `{#defer}` which have similar semantics. These changes rework the binder to account for the new nodes.
PR Close#51816
Content project allows the content to specify its own selector for matching against content projection slots, using the `ngProjectAs` special attribute. We can now treat this attribue specially, and generate the appropriate flag in the consts array, followed by the parsed CSS selector.
PR Close#51544
Supporting content projection requires us to emit three new kinds of output:
1. An `ngContentSelectors` field on the component metadata, which points to an array in the constant pool with all of the `select` attributes from `<ng-content>` elements.
2. One `projectionDef` instruction at the beginning of each root view template function for a component. That `projectionDef` points to a constant pool expression, which contains *parsed* selectors for all `<ng-content>` elements in the root's entire view tree.
3. A `projection` instruction for each `<ng-content>` slot in the view tree. These each get a data slot, a monotonically increasing "content slot", and a pointer to the tag's attributes in the component const array.
We support the first two features entirely within a new compilation phase.
The third feature, collection of processed attributes, is a bit trickier. We now treat `<ng-content>` tags as element-like ops, and use the normal attribute ingestion pipeline to process any attributes, and assign the appropriate `ConstIndex`.
**Note**: We also split up a number of the tests into two expectations files, one for the view functions, and one for other const listerals from the constant pool. This is because `TemplateDefinitionBuilder` emits the literals in a quirky order (mixed in with the view functions) due to how it lazily generates view functions. Our eager ordering is totally different, but by splitting the expectations, we can still share the same tests with `TemplateDefinitionBuilder`.
PR Close#51544
Today in local compilation mode the NgModule bootstrap definition is moved as it is into the runtime `ɵɵdefineNgModule`. This runtime was initially made for AoT full compilation mode and assumes that the bootstrap info is already flattened and resolved. This is not the case in local compilation where the bootstrap is the raw expression coming from the NgModule decorator and can be a nested array. To get around this problem we move the bootstrap along with other scope info (e.g., declarations, imports, exports) to the runtime`ɵɵsetNgModuleScope` to be further analyzed and flattened in runtime.
PR Close#51767
Based on top of #51717
This commit adds extraction for enums, pipes, and NgModules. It also adds a couple of tests for JsDoc extraction that weren't covered in the previous commit.
PR Close#51733
Based on top of #51713
This commit adds docs extraction for information provided in JsDoc comments, including descriptions and Jsdoc tags.
PR Close#51733
Based on top of #51697
Adds extraction for accessors (getters/setters), rest params, and resolved type info for everything so far. This also refactors function extraction into a new class and splits tests for common class info and directive info into separate files.
PR Close#51733
Based on top of #51685
This expands on the extraction with information for directives, including inputs and outputs. As part of this change, I've refactored the extraction code related to class and to directives into their own extractor classes to more cleanly separate extraction logic based on type of statement.
PR Close#51733
Based on top of #51682
This expands on the skeleton previously added to extract docs info for classes, including properties, methods, and method parameters. Type information and Angular-specific info (e.g. inputs) will come in future PRs.
PR Close#51733
This commit adds a barebones skeleton for extracting information to be used for extracting info that can be used for API reference generation. Subsequent PRs will expand on this with increasingly real extraction. I started with @alxhub's #51615 and very slightly polished to get to this minimal commit.
PR Close#51733
Another try at deflaking the tests on Windows. I'm trying a couple of fixes here:
1. I noticed that it's usually the indexer tests that fail during flaky runs. These tests also happen to be the only ones that don't pass in the `files` argument of `NgtscTestEnvironment.setup`. When `files` isn't passed in, we don't hit the file path that sets up the `MockFileSystem`. With these changes I make it so that we always initialize the mock file system.
2. The missing file system error usually comes from the `absoluteFrom` call that initializes the optional `workingDir` argument. My theory is that because it's a default value for an argument, it gets called too early before everything is initialized. These changes move the `absoluteFrom` call further down until it's needed.
PR Close#51804
BREAKING CHANGE: Node.js v16 support has been removed and the minimum support version has been bumped to 18.13.0.
Node.js v16 is planned to be End-of-Life on 2023-09-11. Angular will stop supporting Node.js v16 in Angular v17. For Node.js release schedule details, please see: https://github.com/nodejs/release#release-schedule
PR Close#51755
The `verifyPlaceholdersIntegrity` check in the compliance tests was basically a noop, because it was returning false inside a `forEach` callback. Fixing it revealed that it had fallen out of date, because one of the regexes it uses was incorrect. The problem is that it assumed the placeholder keys would always be string literals, however it's possible that they're identifiers. These changes resolve the issue by not looking at the keys at all since we don't do anything with them.
PR Close#51751
Adds support for passing in `@Component.styles` as a string. Also introduces a new `styleUrl` property on `@Component` for providing a single stylesheet. This is more convenient for the most common case where a component only has one stylesheet associated with it.
PR Close#51715
The code for detecting a Windows CI run from #51701 didn't work, because Bazel isolates the environment variables. These changes work around the issue by passing in a custom variable with the `--test_env` flag.
PR Close#51738
Currently internally Angular has some customized tsconfig files, because we don't align with the tsconfig of the rest of g3. These changes enable `noImplicitReturns` and `noPropertyAccessFromIndexSignature` to align better with the internal config.
PR Close#51728
Reworks the pure functions to use arrow functions with an implicit return instead of function expressions. This allows us to shave off some bytes for each pure function, because we can avoid some of the syntax.
PR Close#51668
These changes build on top of #51514 to add support for advanced expressions inside the `track` parameter of `for` loop blocks. There are two different outputs that the compiler can generate:
1. If the tracking function only references the item or `$index`, the compiler generates a pure arrow function as a constant references in the `repeaterCreate` instruction.
2. If the tracking function has references to properties outside of the `for` loop block, the compiler will rewrite those references to go through `this` and generate a function declaration. The runtime will `bind` the declaration to the current component instance so that the rewritten `this` references are resolved correctly.
Advanced tracking expression come with the following limitations to ensure the best possible performance:
1. They can only reference the item, `$index` and properties directly on the component instance. This means that there'll be an error when accessing this like local template variables and references. While we could get this to work, we would have to traverse the context tree at runtime which will degrade the performance of the loop, because it's a linear time operation that is performed on each comparison. Furthermore, allowing local references would require us re-evaluate the list when any one of them has changed.
2. Pipes aren't allowed inside the tracking function.
3. Object literals and pipes used inside the tracking expression will be recreated on each invocation.
PR Close#51618
Adds type checking for the contents of `if`, `switch` and `for` blocks.
**Note:** this is just an initial implementation to get some basic type checking working and to figure out the testing setup. We'll need special TCB structures for this syntax so that we can support type narrowing.
PR Close#51570
`NGMODULE_VE_DEPENDENCY_ON_IVY_LIB` was a ViewEngine related error. This commit removes the doc page but keeps a redirection for older versions still throwing this error.
PR Close#51588
With the new control flow and defer blocks it'll be common for several template instructions to be declare one after another. These changes add support for chaining to the `template` instruction which will allow us to save some bytes.
PR Close#51546
Adds the initial implementation to generate the instructions for the `for` loop block.
**Note:** the expressions we support in the `track` paramateter are currently limited to tracking by identity or index, or a specific property of the item. Supporting more advanced expression will require additional work that I'll do in a follow-up PR.
PR Close#51514
`switch` blocks are part of the new control flow syntax. This commit adds support for processing them, and emitting the appropriate templates and conditional instructions.
PR Close#51518
`syntheticHostListener` and `listener` have ordering dependencies. We reuse the existing ordering phase, and generalize it to also order create mode instructions.
PR Close#51498
Animation listeners on host bindings result in a special `syntheticHostListener` instruction. We can now emit this instruction.
Additionally, the naming phase for events has been slightly refactored to smoothly incorporate whether the event is from a host listener, as well as whether it is an animation listener.
PR Close#51498
For host bindings, `TemplateDefinitionBuilder` seems to use a different binding ordering, in which style bindings come after all the property bindings. We approximate that by treating `hostProperty` differently from `property` in the ordering phase.
PR Close#51498
The template pipeline is already capable of parsing and processing class and style attributes on templates. We now extend that functionality to host bindings.
The parser, for some reason, splits out class and style attributes into a `specialAttributes` field. We merge them back into the main attributes map, and allow the template pipeline to process them normally.
PR Close#51498
TemplateDefinitionBuilder only extracts host attributes if they are text attributes. For example, `[attr.foo]="'my-value'"` is not extracted despite being a string literal, because it is not a text attribute.
PR Close#51498
Host property bindings can be animation bindings, and should be ingested and emitted as such, as well as being processed by the renaming phase.
PR Close#51498
Host bindings can apply static attributes. These will be extracted to a `hostAttrs` field on the host binding function's metadata.
In order to achieve this, we add an `attributes` field to the host binding job. Then, we peform attribute exraction on host bindings. We finally populate the `attributes` field directly, instead of relying on a `consts` array.
PR Close#51498
Adds i18n block start & end ops, as well as a new phase to construct the
i18n message variable to be added to the consts array.
Co-authored-by: Alex Rickabaugh <alx+alxhub@alxandria.net>
Co-authored-by: Dylan Hunn <dylhunn@gmail.com>
PR Close#51353
This commit adds an initial implementation of the `{#defer}` block runtime, which supports the `when` conditions. More conditions and basic prefetching support will be added in followup PRs.
PR Close#51347
Extends the compiler to add support for generating arrow functions in the output AST. This will be required for the `for` control flow block and we can potentially leverage it in other places to reduces the amount of generated code.
PR Close#51436
Adds the logic to generate the instructions for `if` blocks. There are two primary use cases we need to account for:
A conditional that doesn't use the `as` parameter of the `if` block. To support it we generate a nested ternary expression that evaluates to the index of the template whose condition is truthy. If the block doesn't have an `else` branch, we pass in a special `-1` value which means that no view will be rendered.
Example with an `else`:
```ts
// {#if expr}
// ...
// {:else if otherExpr} ...
// {:else} ...
// {/if}
if (rf & 1) {
ɵɵtemplate(0, App_Conditional_0_Template, 0, 0);
ɵɵtemplate(1, App_Conditional_1_Template, 0, 0);
ɵɵtemplate(2, App_Conditional_2_Template, 0, 0);
}
if (rf & 2) {
ɵɵconditional(0, ctx.expr ? 0 : ctx.otherExpr ? 1 : 2);
}
```
Example without an `else`:
```ts
// {#if expr}
// ...
// {:else if otherExpr} ...
// {/if}
if (rf & 1) {
ɵɵtemplate(0, App_Conditional_0_Template, 0, 0);
ɵɵtemplate(1, App_Conditional_1_Template, 0, 0);
}
if (rf & 2) {
ɵɵconditional(0, ctx.expr ? 0 : ctx.otherExpr ? 1 : -1);
}
```
If a conditional captures it's value in an alias (e.g. `{#if expr; as foo}`) we need to assign the value to a temporary variable before passing it along to `conditional`.
```ts
// {#if expr; as alias}...{/if}
if (rf & 1) {
ɵɵtemplate(0, App_Conditional_0_Template, 1, 0);
}
if (rf & 2) {
let App_contFlowTmp;
ɵɵconditional(0, (App_contFlowTmp = ctx.expr) ? 0 : -1, App_contFlowTmp);
}
```
PR Close#51380
Angular 16.1 introduced the input transform feature, requiring the partial compilation output to be extended
with a reference to the input transform function. This has resulted in a subtle breaking change, where older
versions of the Angular linker can no longer consume libraries that have started to use this feature.
We do try to support using a 16.1 library from an Angular 16.0 application, but if a library actually
adopts a new feature then this is no longer possible. In such cases, it is desirable to report a message
telling the user that their version of the Angular compiler is too old, as determined by the `"minVersion"`
property that is present in each partial declaration. This version would still indicate that the declaration
required at least Angular 14.0 to be compiled, but this is not accurate once input transforms are being
used. Consequently, this error would not be reported, causing a less informative error once the input transform
was being observed.
Fixes#51411
PR Close#51413
In local compilation mode it is not possible to use an imported string for component's template or styles as it cannot be resolved statically in compile time. There are some such use cases in g3 and potentially devs might incorporate such pattern. At the moment such pattern will cause the local compilation fail with generic error messages (e.g., so and so at position 1 is not a reference, etc). This change makes specific error messages with helpful hints for such cases. These new error messages can help devs to quickly resolve the issue as well as make it possible to identify existing issues in g3.
PR Close#51338
`tsickle` is not used in any code paths in 3P and we can remove
this complexity. The `tsickle` npm package has not been released
in a while and we are risking breakages with e.g. future TypeScript
versions.
Note that the `ng_module` rule was updated to not emit through
tsickle at all. The tsickle in 1P is done directly by `tsc_wrapped`
and our code path in `compiler-cli` is not needed at all.
PR Close#50602
This commit updates TestBed to wait for async component metadata resolution before compiling components.
Async metadata is added by the compiler in case a component uses defer blocks, which contain deferrable
symbols.
PR Close#51182
This commit updates compiler logic to generate the `setClassMetadataAsync` calls for components that used defer blocks. The `setClassMetadataAsync` function loads deferrable dependencies and invokes the `setClassMetadata` synchronously once everything is loaded. This change is needed to avoid eager references to deferrable symbols in component metadata in generated code.
PR Close#51182
Fixes that we weren't processing `when` conditions correctly which led to a compilation error when a pipe is used inside the expression.
PR Close#51368
A factory generator function called "i0.ɵɵgetComponentDepsFactory" is added to generate a factory function for component dependencies. This function will use the deps tracker to calculate the component's dependencies.
For standalone components the component imports (if exists) will be passed to this function. Alternatively this function can grab the imports directly from the decorate, but such extraaction needs some runtime logic which overlapps with what the trait compiler is doing. So better to pass the imports directly to this function at compile time.
PR Close#51089
In local mode the compiler combines the raw imports and exports and pass them to the injector definition as the imports field. It is not possible to filter out ng modules at compile time though, and it will be done in runtime.
Unit tests also added, and since that was the first time adding tests for local compilation some tweaks had to be made in order to disable diagnostics in local compilation mode in order for tests to run (such situation is also the case in real compilation where we ignore all teh diagnostics basically)
PR Close#51089
This commit updates the logic to drop regular imports when all symbols that it brings can be defer-loaded.
The change ensures that there is no mix of regular and dynamic imports present in a source file.
PR Close#51171
Stores the `deferred` block triggers as a map instead of an array, because triggers can't be duplicated and because having to search through an array will be inconvenient later on.
I've also added a `DeferredBlock.visitAll` method to deduplicate the logic from the various visitor implementations.
PR Close#51262
Updates the template pipeline's temporary variables phase to reuse
temporary variables within an expression. The algorithm implemented here
reuses variables more aggressively than TemplateDefinitionBuilder. This
change in behavior is acceptable, as it is unlikely to cause any
failures, and implementing the exact behavior observed in
TemplateDefinitionBuilder would be difficult.
PR Close#51100
In some cases it is not feasible to have the template pipeline produce
the exact same compiled output as the TemplateDefinitionBuilder. This
commit adds support to the testing infrastructure to have different
expected output files for each. This option should be used sparingly, as
we want the output to be as close as possible.
PR Close#51100
Updates the TemplateDefinitionBuilder class to generate the `defer` instruction for `{#defer}` blocks. Also generates dependency function that would be invoked at runtime (with dynamic imports inside).
PR Close#51162
This commit brings the logic to calculate teh set of dependencies for each defer block. For each dependency we also identify whether it can be defer-loaded or not.
PR Close#51162
This is a minor refactoring of the ComponentHandler class logic to extract helper function and types to the top level for simplicity and reuse across other functions of the class.
PR Close#51162
This commit adds a new class called `DeferredSymbolTracker` to keep track of all usages of a particular symbol within a source file and allow to detect whether a symbol can be defer loaded (i.e. if there are any references to a symbol).
PR Close#51162
Host property bindings beginning with `attr.` should have `Attribute` binding kind, and result in an `attribute` instruction.
This should really be handled in the parser in the future.
PR Close#51188
Templates may contain special `svg` and `math` elements, as well as logical descendants of those elements (e.g. `svg` may contain `g`). These will be parsed with a special colon-prefixed *namespace identifier*, such as `:svg:svg`, or `:svg:g`, or `:math:infinity`.
The template pipeline now considers these namespace prefixes, and stores them specially on the Element and Template data structures, ultimately generating the appropriate runtime instructions to change namespaces when needed.
PR Close#51188
When a container-like element has the `ngNonBindable` special attribute, bindings are disabled for it and its descendants. This requires emitting the `disableBindings` and `enableBindings` instructions when nested content exists.
PR Close#51188
Interestingly, host bindings are parsed quite differently from template functions. For example, bindings such as `[style.foo]: 3px` would be parsed into a value, unit, and type when bound to a template, but will not be parsed as such when used in a host binding.
In this commit, we remedy this shortcoming by adding support for bindings in host binding functions to the template pipeline. In particular, we create a phase to process these bindings, and transform them into the correct output binding kind.
Additionally, we fix some other minor bugs and omissions.
Finally, we enable compilation of host bindings with the template pipeline, which requires us to turn off a number of failing tests.
PR Close#50899
Begin producing source maps for the template pipeline, for a couple fundamental kinds of instructions, including elements, templates, properties, text, and interpolations.
PR Close#50899
Previously, `$event` was interpreted as a lexical read on the enclosing context. Now, a new pass converts such reads into simple output AST reads of `$event`, so they are not processed by the context resolution or naming phases. Additionally, the same pass sets a field on the enclosing listener op, so that the reify phase does not have to search for reads of `$event`.
PR Close#50899
`$any(...)` casts should be dropped, except when they are an explicit call on `this.$any(...)`. Fix a bug in which we were transforming `ThisReceiver` into an implicit receiver.
PR Close#50899
This commit updates the output AST (and related visitors) to support dynamic imports. This functionality will be used later to generate the output for defer blocks.
PR Close#51087
Adds the logic to create `defer`-specific AST nodes from the generic HTML `BlockGroup` and `Block`. The logic for parsing the triggers will be in the next commit.
PR Close#51050
Ensures that all property and attribute ops are ordered consistently
regardless of the order they appear in the template. This ensures
correct precedence (e.g. `[style.color]="'#000'"` awlays wins out over
`[style]="{color: '#fff'}"`)
PR Close#50805
A minimal change to full compilation mode to work in local mode. Now compiler can compile components without ctor injections, though the compiled code missing the following items which will be added in subsequent commits:
* it does not produce `dependencies` for component definition.
* it fails if component has ctor injection
PR Close#50545
The compiler will only include analysis and compile phases in local mode. Also a new `compileLocal` method is added to the annotation handler for local compilation.
This commit makes no change to the full/partial compilation code paths.
PR Close#50545
An internal compiler option named `supportJitMode` is now available for use by the Angular CLI.
This option currently controls the emit of NgModule selector scope information. This emitted
information is only needed in AOT mode when an application also uses JIT. However, AOT mode
combined with JIT mode is not currently supported nor will work in the Angular CLI. With
the Angular CLI, JIT mode is only supported if the entire application is built in JIT mode.
Without this option, the CLI needs to manually perform a code transform to remove the information
and also replicate TypeScript's import eliding. This is can be a complicated operation and must
be continually kept up to date with any changes to both the Angular compiler and TypeScript.
The introduction of this new option alleviates these concerns while also removing several build
time actions that would otherwise need to be performed on every application build.
PR Close#51007
This commit adds the ability to generate attribute instructions as a result of property bindings such as `[attr.foo]='bar'` or `attr.foo='{{bar}}'`. "Singleton" interpolations, such as the previous example, will also be transformed into a simple `attribute` instruction.
PR Close#50818
The option 'local compile' is added for the test cases, and the locally compiled file for an input `abc.ts` is compared by default with the file `abc.local.js`. This allows to use the same input `abc.ts` for both full compilation (compared with `abc.js`) and local compilation (compared with `abc.local.js`). An example is provided in the next commit when compliance tests are added for the NgModule local compilation.
PR Close#50577
The new interface is discrete-unioned with the existing interface to cover the cases for local and global (i.e., full and partial) compilation modes.
This change of interface required some adjustmeents cross repo which explains the changes made to other files.
PR Close#50577
All attempts related to obtaining R3Reference for bootstrap, imports, exports and declarations are cut in local compilation mode.
This will allow the analysis to pass without any error diagnostics, but the result is a quite empty meta info. Next commits will add data to the meta so that the NgModule can be compiled more accurately.
PR Close#50577
The expression `a()?.b` should expand into `(tmp = a()) === null ? null : tmp.b`, in order to avoid calling the function `a()` twice.
This commit modifies the null-safe-expansion algorithm to emit temporary assignments, and provides the reification code to actually generate the declarations, assignments, and reads.
Note also that, with our bottom-up algorithm, there are some tricky cases when a function call exists inside an indexed access, such as `f1()?.[f2()?.a]?.b`. We add some special logic to avoid generating a double-assignment to the temporary storing the result of `f2()`.
Finally, there are opportunities to reuse the same temporary in expressions like `a?.[f()]?.[f()]`. We save this for the next commit.
PR Close#50688
An internal compiler option named `supportTestBed` is now available for use by the
Angular CLI. This option currently controls the extraction and emit of Angular class
metadata. This emitted information is only needed in AOT mode when using certain
TestBed APIs. However, AOT mode is currently not available for unit testing within
the Angular CLI. As a result, the metadata is not used within CLI generation applications
and in particular production applications. Without this option, the CLI needs to
manually perform a code transform to remove the metadata and also replicate TypeScript's
import eliding. This is can be a complicated operation and must be continually kept
up to date with any changes to both the Angular compiler and TypeScript. The introduction
of this new option alleviates these concerns.
PR Close#50604
A larger investigation on why this is flaky is needed. Currently the
test is flaky with around 77% sucess rate and negatively impacts team
productivity. Subjectively, as reported by team members this it's much
more flaky than a success rate of 77%.
PR Close#50718
If a library is compiling with Angular v16.1.0, the library will break
for users that are still on Angular v16.0.x. This happens because the
`DirectiveDeclaration` or `ComponentDeclaration` types are not expecting
an extra field for `signals` metadata. This field was only added to the
generic types in `16.1.0`- so compilations fail with errors like this:
```
Error: node_modules/@angular/material/icon/index.d.ts:204:18 -
error TS2707: Generic type 'ɵɵComponentDeclaration' requires between 7 and 9 type arguments.
```
To fix this, we quickly roll back the code for inserting this metadata
field. That way, libraries remain compatible with all v16.x framework
versions.
We continue to include the `signals` metadata if `signals: true` is set.
This is not public API anyway right now- so cannot happen- but imagine
we expose some signal APIs in e.g. 16.2.x, then we'd need this metadata
and can reasonably expect signal-component library users to use a more
recent framework core version.
PR Close#50714
If the compiler CLI is running through closure compiler, the trait
decorator handlers are converted from classes to functions as ES5
is picked as default output target for the bundled version.
The problem is that currently all trait handlers end up having the
same `name`. i.e. an empty string, and therefore adopting previous
traits from a previous build iteration result in the incorrect handler
being used for e.g. registrering, compiling etc- causing
ambiguous/confusing errors down the line in other parts.
We can look into changing the output target in the future, but even
then we are safer using an actual literal due to property renaming.
```$$closure$$NgModuleDecoratorHandler = function() {}`.
It is is questionable if we should just simply NOT run the compiler
through JSCompiler.
PR Close#50673
Angular's null-safe access operators differ from Javascript's built-in semantics, in that they short-circuit to `null` instead of `undefined`. This necessitates providing a custom transformation, instead of relying on Typescript or Javascript itseld.
The old TemplateDefinitionBuilder uses a top-down approach based on the Visitor pattern, in which it recursively extracts the left-most safe access, and hoists it to a null check at the top. See `expression_converter.ts` for details.
In this commit, we replace that approach with a new bottom-up algorithm, as part of the template pipeline. This requires an intermediate expression type to represent the not-yet-expanded ternary operators, and is split into its own pass.
Null-safe function calls are not yet implemented, since they will rely on a future temporary variable allocation pass.
Co-authored-by: Alex Rickabaugh <alxhub@users.noreply.github.com>
PR Close#50594
Refactor attribute and property binding ingestion and add an attribute extraction phase
Co-authored-by: Alex Rickabaugh <alxhub@users.noreply.github.com>
Co-authored-by: Dylan Hunn <dylhunn@users.noreply.github.com>
Only add the value to the ElementAttributes map for style and attribute kinds
Other kinds should not have their value represented in the consts array
Add missing attribute ingesiton for templates
Unify how template and element bindings are ingested
This resolves the issue of missing listener attributes on templates. In
order to avoid emitting extraneous instructions, listener ops on
templates are stripped in the attribute extraction phase instead.
Handle different binding types separately in ingest
Cleanup code and comments
Disable test that fails on new explicit error.
Previously the test was passing because ingestPropertyBinding treated
attribute bindings as normal bindings which happened to be ok for the
particular test. Now there's an explicit error that attrbiute bindings
aren't yet handled which causes the test to fail
Address feeback
PR Close#50664
Add a flag to disable specific tests when testing the template pipeline
Mark the currently failing tests
Add the template pipeline tests to CI
Update package.json
Co-authored-by: Paul Gschwendtner <paulgschwendtner@gmail.com>
PR Close#50582
According to the HTML specification most attributes are defined as strings, however some can be interpreted as different types like booleans or numbers. [In the HTML standard](https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#boolean-attributes), boolean attributes are considered `true` if they are present on a DOM node and `false` if they are omitted. Common examples of boolean attributes are `disabled` on interactive elements like `<button>` or `checked` on `<input type="checkbox">`. Another example of an attribute that is defined as a string, but interpreted as a different type is the `value` attribute of `<input type="number">` which logs a warning and ignores the value if it can't be parsed as a number.
Historically, authoring Angular inputs that match the native behavior in a type-safe way has been difficult for developers, because Angular interprets all static attributes as strings. While some recent TypeScript versions made this easier by allowing setters and getters to have different types, supporting this pattern still requires a lot of boilerplate and additional properties to be declared. For example, currently developers have to write something like this to have a `disabled` input that behaves like the native one:
```typescript
import {Directive, Input} from '@angular/core';
@Directive({selector: 'mat-checkbox'})
export class MatCheckbox {
@Input()
get disabled() {
return this._disabled;
}
set disabled(value: any) {
this._disabled = typeof value === 'boolean' ? value : (value != null && value !== 'false');
}
private _disabled = false;
}
```
This feature aims to address the issue by introducing a `transform` property on inputs. If an input has a `transform` function, any values set through the template will be passed through the function before being assigned to the directive instance. The example from above can be rewritten to the following:
```typescript
import {Directive, Input, booleanAttribute} from '@angular/core';
@Directive({selector: 'mat-checkbox'})
export class MatCheckbox {
@Input({transform: booleanAttribute}) disabled: boolean = false;
}
```
These changes also add the `booleanAttribute` and `numberAttribute` utilities to `@angular/core` since they're common enough to be useful for most projects.
Fixes#8968.
Fixes#14761.
PR Close#50420
We have a code path that accesses the `originalKeywordKind` property which logs a deprecation warning in version 5.1, but isn't available in some of the earlier versions that we support. These changes add a compatibility layer that goes through the non-deprecated function, if it exists.
PR Close#50460
Remove convertIndexImportShorthand tsickle option. It's going to be
removed from tsickle in https://github.com/angular/tsickle/pull/1442.
`false` is the default value, so setting it here has no effect
currently.
PR Close#50343
Adds the necessary compiler changes to support input transform functions. The compiler output has changed in the following ways:
### Directive handler
The directive handler now extracts a reference to the input transform function and it resolves the type of its first parameter. It also asserts that the type can be referenced in the compiled output and that it doesn't clash with any pre-existing `ngAcceptInputType_` members.
### .d.ts
In the generated declaration files the compiler now inserts an `ngAcceptInputType_` member for each input with a `transform` function. The member's type corresponds to the type of the first parameter of the function, e.g.
```typescript
// foo.directive.ts
@Directive()
export class Foo {
@Input({transform: (incomingValue: string) => parseInt(incomingValue)}) value: number;
}
// foo.directive.d.ts
export class Foo {
value: number;
static ngAcceptInputType_value: string;
}
```
### Type check block
If an input has `transform` function, the TCB will use the type of its first parameter for the setter type. This uses the same infrastructure as the `ngAcceptInputType_` members.
### Directive declaration
The generated runtime directive declaration call now includes the `transform` function in the `inputs` map, if the input is being transformed. The function will be picked up by the runtime in the next commit to do the actual transformation.
```typescript
// foo.directive.ts
@Directive()
export class Foo {
@Input({transform: (incomingValue: string) => parseInt(incomingValue)}) value: number;
}
// foo.directive.js
export class Foo {
ɵdir = ɵɵdefineDirective({
inputs: {
value: ['value', 'value', incomingValue => parseInt(incomingValue)]
}
});
}
```
PR Close#50225
Fixes that the host directives feature was incorrectly throwing the conflicting alias error when an aliased binding was being exposed under the same alias.
Fixes#48951.
PR Close#50364
Adds a new AST for a `TransplantedType` in the compiler which will be used for some upcoming work. A transplanted type is a type node that is defined in one place in the app, but needs to be copied to a different one (e.g. the generated .d.ts). These changes also include updates to the type translator that will rewrite any type references within the type to point to the new context file.
PR Close#50104
This commit adds back `ngcc` as a no-op operation. When invoked it will warn providing details about removing `ngcc`.
In Angular 17, this will be removed.
PR Close#50045
This commit adds the `signals: boolean` property to the internal
directive/component metadata. This does not add it to the public API
yet, as the feature has no internal support other than compiler
detection.
PR Close#49981
In this mode the compiler generates code based on each individual source file without using its dependencies. This mode is suitable only for fast edit/refresh during development.
PR Close#49846
NgModules which import standalone components currently list those components
in their injector definitions, because we assume that any standalone
component may export providers from its own imports.
This commit adds an optimization for that emit, which attempts to statically
analyze the NgModule imports and determine which standalone components, if
any are present, do not export providers and thus can be omitted.
This analysis is imperfect, because some imported components may be declared
outside of the current compilation, or transitively import types which are
declared outside the compilation. These types are therefore _assumed_ to
carry providers and so the optimization isn't applied to them.
PR Close#49837
The compiler currently does not check to make sure that directives in
the host bindings are exported. These directives are part of the public
API of the component so they do have to be.
PR Close#49527
Fixes that the compiler was matching directives based on `attr` bindings which doesn't correspond to the runtime behavior. This wasn't a problem until now because the matched directives would basically be a noop, but they can cause issues with required inputs.
PR Close#49713
This commit updates the minimum supported Node version across packages from 16.13.0 -> 16.14.0 to ensure compatibility with dependencies.
PR Close#49771
It seems that changes in prior commits led to a new error in the Windows CI job,
likely due to its sandboxing setup in Bazel. This commit adds an explicit type
annotation that should avoid the error.
PR Close#49136
There used to be a subclass of `TraitCompiler` in ngcc, but now that ngcc has been removed
we can update `TraitCompiler` to no longer expose certain fields and methods.
PR Close#49136
There's an issue where formatting with `clang-format` doesn't agree with itself on how
the docblock for a field named `import` should be indented; if it is indented then it
removes the indentation, but then linting the source file reports an error where it
wants to revert the indentation change. By using computed property syntax this bug
is avoided.
PR Close#49136
The concept of "internal" and "adjacent" type expression used to be necessary to support
ngcc, as it had to process downleveled class declarations using an IIFE, where the class
name within the IIFE could be different from the outer class name. With the removal of
ngcc we no longer need to make this distinction, so this commit removes these concepts
entirely.
PR Close#49136
ngcc's reflection host would recognize tslib helpers and some JS builtin methods to allow
the static interpreter to evaluate compiled and downleveled JS code, but now that ngcc
has been removed this functionality is no longer being used.
PR Close#49136
This commit simplifies various parts of ngtsc to no longer support synthetic decorators,
downleveled enum members and inline declarations. These concepts were present to support
ngcc, but can be dropped now that ngcc has been removed.
PR Close#49136
This diagnostic ensures that the special attribute `ngSkipHydration` is not a binding and has no other value than `"true"` or an empty value.
Fixes#49501
PR Close#49512
When we create a context to inject inside our ngTemplateOutlet, the context was declare as Object, therefore, there are no compilation error.
Now if we add a context, we get error at compile type.
BREAKING CHANGE: If the 'ngTemplateOutletContext' is different from the context, it will result in a compile-time error.
Before the change, the following template was compiling:
```typescript
interface MyContext {
$implicit: string;
}
@Component({
standalone: true,
imports: [NgTemplateOutlet],
selector: 'person',
template: `
<ng-container
*ngTemplateOutlet="
myTemplateRef;
context: { $implicit: 'test', xxx: 'xxx' }
"></ng-container>
`,
})
export class PersonComponent {
myTemplateRef!: TemplateRef<MyContext>;
}
```
However, it does not compile now because the 'xxx' property does not exist in 'MyContext', resulting in the error: 'Type '{ $implicit: string; xxx: string; }' is not assignable to type 'MyContext'.'
The solution is either:
- add the 'xxx' property to 'MyContext' with the correct type or
- add '$any(...)' inside the template to make the error disappear. However, adding '$any(...)' does not correct the error but only preserves the previous behavior of the code.
fix#43510
PR Close#48374
`entryComponents` have been deprecated since version 9, because with Ivy they weren't necessary. These changes remove any remaining references.
BREAKING CHANGE:
* `entryComponents` has been deleted from the `@NgModule` and `@Component` public APIs. Any usages can be removed since they weren't doing anyting.
* `ANALYZE_FOR_ENTRY_COMPONENTS` injection token has been deleted. Any references can be removed.
PR Close#49484
This commit updates parts of the FW to be ES2022 complaint.
These changes are needed to fix the following problems problems with using properties before they are initialized.
Example
```ts
class Foo {
bar = this.buz;
constructor(private buz: unknown){}
}
```
PR Close#49559
This commit updates parts of the FW to be ES2022 complaint.
These changes are needed to fix the following problems problems with using properties before they are initialized.
Example
```ts
class Foo {
bar = this.buz;
constructor(private buz: unknown){}
}
```
PR Close#49332
Adds support for marking a directive input as required. During template type checking, the compiler will verify that all required inputs have been specified and will raise a diagnostic if one or more are missing. Some specifics:
* Inputs are marked as required by passing an object literal with a `required: true` property to the `Input` decorator or into the `inputs` array.
* Required inputs imply that the directive can't work without them. This is why there's a new check that enforces that all required inputs of a host directive are exposed on the host.
* Required input diagnostics are reported through the `OutOfBandDiagnosticRecorder`, rather than generating a new structure in the TCB, because it allows us to provide a better error message.
* Currently required inputs are only supported during AOT compilation, because knowing which bindings are present during JIT can be tricky and may lead to increased bundle sizes.
Fixes#37706.
PR Close#49468
This reverts commit 13dd614cd1.
This breaks a g3 Typescript compilation tests where diagnostics are
expected for a missing input in the component.
PR Close#49467
Adds support for marking a directive input as required. During template type checking, the compiler will verify that all required inputs have been specified and will raise a diagnostic if one or more are missing. Some specifics:
* Inputs are marked as required by passing an object literal with a `required: true` property to the `Input` decorator or into the `inputs` array.
* Required inputs imply that the directive can't work without them. This is why there's a new check that enforces that all required inputs of a host directive are exposed on the host.
* Required input diagnostics are reported through the `OutOfBandDiagnosticRecorder`, rather than generating a new structure in the TCB, because it allows us to provide a better error message.
* Currently required inputs are only supported during AOT compilation, because knowing which bindings are present during JIT can be tricky and may lead to increased bundle sizes.
Fixes#37706.
PR Close#49453
This reverts commit 1a6ca68154.
This breaks tests in google3 which might be depending on private APIs. We
need to update these tests before we can land this PR.
PR Close#49449
Adds support for marking a directive input as required. During template type checking, the compiler will verify that all required inputs have been specified and will raise a diagnostic if one or more are missing. Some specifics:
* Inputs are marked as required by passing an object literal with a `required: true` property to the `Input` decorator or into the `inputs` array.
* Required inputs imply that the directive can't work without them. This is why there's a new check that enforces that all required inputs of a host directive are exposed on the host.
* Required input diagnostics are reported through the `OutOfBandDiagnosticRecorder`, rather than generating a new structure in the TCB, because it allows us to provide a better error message.
* Currently required inputs are only supported during AOT compilation, because knowing which bindings are present during JIT can be tricky and may lead to increased bundle sizes.
Fixes#37706.
PR Close#49304
The decorator downlevel transform is never used for actual class
decorators because Angular class decorators rely on immediate execution
for JIT. Initially we also supported downleveling of class decorators
for View Engine library output, but libraries are shipped using partial
compilation output and are not using this transform anymore.
The transform is exclusively used for JIT processing, commonly for
test files to help ease temporal dead-zone/forward-ref issues. We can
remove the class decorator downlevel logic to remove technical debt.
PR Close#49351
BREAKING CHANGE: Node.js v14 support has been removed
Node.js v14 is planned to be End-of-Life on 2023-04-30. Angular will stop supporting Node.js v14 in Angular v16. Angular v16 will continue to officially support Node.js versions v16 and v18.
PR Close#49255
Consider the following scenario:
1. A TS file with a component and templateUrl exists
2. The template file does not exist.
3. First build: ngtsc will properly report the error, via a FatalDiagnosticError
4. The template file is now created
5. Second build: ngtsc still reports the same errror.
ngtsc persists the analysis data of the component and never invalidates
it when the template/style file becomes available later.
This breaks incremental builds and potentially common workflows
where resource files are added later after the TS file is created. This
did surface as an issue in the Angular CLI yet because Webpack requires
users to re-start the process when a new file is added. With ESBuild
this will change and this also breaks incremental builds with
Bazel/Blaze workers.
To fix this, we have a few options:
* Invalidate the analysis when e.g. the template file is missing. Never
caching it means that it will be re-analyzed on every build iteration.
* Add the resource dependency to ngtsc's incremental file graph. ngtsc
will then know via `host.getModifiedResources` when the file becomes
available- and fresh analysis of component would occur.
The first approach is straightforward to implement and was chosen here.
The second approach would allow ngtsc to re-use more of the analysis
when we know that e.g. the template file still not there, but it
increases complexity unnecessarily because there is no **single**
obvious resource path for e.g. a `templateUrl`. The URL is attempted
to be resolved using multiple strategies, such as TS program root dirs,
or there is support for a custom resolution through
`host.resourceNameToFileName`.
It would be possible to determine some candidate paths and add them to
the dependency tracker, but it seems incomplete given possible external
resolvers like `resourceNameToFileName` and also would likely not have
a sufficient-enough impact given that a broken component decorator is
not expected to remain for too long between N incremental build
iterations.
PR Close#49184
Drops support for TypeScript 4.8 from the compiler and removes all of the compatibility code we had for it.
BREAKING CHANGE:
* TypeScript 4.8 is no longer supported.
PR Close#49155
The options to generate NgFactory and NgSummary files were added to Ivy for backwards compatibility with ViewEngine. Since ViewEngine was deprecated and removed, the NgFactory and NgSummary files are no longer used as well.
This commit drops obsolete options to generate NgFactory and NgSummary files. Also, the logic that generates those files is also removed.
PR Close#48268
This commit removes the NGCC code and all the related infra setup required to support it.
BREAKING CHANGE: Angular Compatibility Compiler (ngcc) has been removed and as a result Angular View Engine libraries will no longer work
PR Close#49101
Uses an alternate approach of preserving default imports that doesn't involve the `getMutableClone` function that is being removed in TypeScript 5.0.
The alternate approach was already used in the downlevel transform and it works by patching the EmitResolver of the current transformation context to tell TypeScript to preserve the import.
PR Close#49070
In #48898 the `isForwardRef` flag was added to indicate whether a reference should be wrapped in a `forwardRef`. This logic assumed that the node can't be referring to another node within the same file, however from testing it looks like that's not actually the case, because we hit the same code path when an external import to the same symbol exists already.
PR Close#48988
In the `PotentialImport` we indicate if it's in the same file by not setting a `moduleSpecifier`, but if that's the case, the imported symbol might need to be wrapped in a `forwardRef` to avoid generating an error. These changes expose this information so the various tools can take advantage of it.
PR Close#48898
Some 1p module which uses the method TscPlugin.wrapHost requires to import this type to make its internal class definitions compatible with this type.
PR Close#48874
Fixes that the expression converter was producing code that throws a runtime error if a non-null assertion is used as a part of a safe read, write or call.
Fixes#48742.
PR Close#48801
This commit updates one usage of the `ts.factory.createMethodDeclaration` API
to avoid a deprecated function signature, which avoids logging a warning.
PR Close#48812
Reworks some of the existing compiler APIs to make them easier to use in a schematic and exposes a few new ones to surface information we already had. High-level list of changes:
* `getPotentialImportsFor` now requires a class reference, instead of a `PotentialDirective | PotentialPipe`.
* New `getNgModuleMetadata` method has been added to the type checker.
* New `getPipeMetadata` method has been added to the type checker.
* New `getUsedDirectives` method has been added to the type checker.
* New `getUsedPipes` method has been added to the type checker.
* The `decorator` property was exposed on the `TypeCheckableDirectiveMeta`. The property was already present at runtime, but it wasn't specified on the interface.
PR Close#48730
NgModules can re-export other NgModules, which transitively includes all traits exported by the re-exported NgModule. We want to be able to suggest *all* re-exports of a component when trying to auto-import it.
Previously, we used an approximation when importing from NgModules: we looked at a Component's metadata, and just imported the declaring NgModule. However, this is not technically correct -- the declaring NgModule it is not necessarily the same one that exports it for the current scope. (Indeed, there could be multiple re-exports!) As a replacement, I have implemented a more general solution.
This PR introduces a new class on the template type checker, called `NgModuleIndex`. When queried, it conducts a depth-first-search over the NgModule import/export graph, in order to find all NgModules anywhere in the current dependency graph, as well as all exports of those NgModules. This allows the language service to suggest all of the re-exports, in addition to the original export.
PR Close#48354
`MetadataReaderWithIndex.getKnown` currently returns an iterator. It will be easier to work with for upcoming usages if it returns an array instead.
PR Close#48354
Fixes a deprecation warning that was being logged by compiler when generating aliases, because we weren't going through `ts.factory` to create an AST node.
PR Close#48652
In #47167 an `updateClassDeclaration` call was swapped out with a `createClassDeclaration` which caused a regression where interface references were being retained when using a custom decorator in a project that has `emitDecoratorMetadata` enabled.
These changes switch back to use `updateClassDeclaration`.
Fixes#48448.
PR Close#48638
Allows for self-closing tags to be used for non-native tag names, e.g. `<foo [input]="bar"></foo>` can now be written as `<foo [input]="bar"/>`. Native tag names still have to have closing tags.
Fixes#39525.
PR Close#48535
Similar to how the `@babel/core` dependency is managed for the localize
NPM package, the version should be locked. Also the version should
correspond to the version we install for building & testing.
Currently the Babel version allowed by the compiler-cli may not
work given the ESM -> CJS interop. causing errors like:
```
import { types as t } from "@babel/core";
^^^^^
SyntaxError: Named export 'types' not found. The requested module '@babel/core' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:
import pkg from '@babel/core';
const { types: t } = pkg;
```
We can only be confident about the interop if we know the version
installed- is the one we test.
PR Close#48634
We dropped support for TypeScript 4.7 in version 15, but we had to keep around the runtime code, because of g3. Now that g3 is on 4.8, we can remove the additional code.
PR Close#48470
This is basically a pre-step for combining devmode and prodmode into a
single compilation. We are already achieving this now, and can claim
with confidence that we reduced possible actions by half. This is
especially important now that prodmode is used more often, but rules
potentially still using the devmode ESM sources. We can avoid double
compilations (which existed before the whole ESM migration too!).
We will measure this more when we have more concrete documentation
of the changes & a better planning document.
Changes:
* ts_library will no longer generate devmode `d.ts`. Definitions are
generated as part of prodmode. That way only prodmode can be exposed
via providers.
* applied the same to `ng_module`.
* updates migrations to bundle because *everything* using `ts_library`
is now ESM. This is actually also useful in the future if
schematics rely on e.g. the compiler.
* updates schematics for localize to also bundle. similar reason as
above.
PR Close#48521
Since the Bazel setup in this repo will now always use ESM,
the tooling scripts/binaries in AIO need to be switched to ESM
too. Most of the scripts are already ESM, but a few had to be converted.
Note that the Dgeni generation does not use ESM because it's unaffected
and the Dgeni CLI is used. In the future we could also update the Dgeni
setup to ESM but there is no need currently.
PR Close#48521
Since we generate a `.mjs` file as entry-point for jasmine tests,
a couple of issues prevented the transitive dependencies from
bootstrap targets to be brought in (causing resolution errors):
1. The `_files` (previously `_esm2015`) targets are no longer needed,
and they also miss all the information on runfiles.
2. The aspect for computing linker mappings does not respect the
`bootstrap` attribute from the `spec_entrypoint` so we manually
add the extract ESM output targets (this rule works with the aspect
and forwards linker mappings).
PR Close#48521
For every `ts_library` target we expose a shorthand that grants
access to the JS files because `DefaultInfo` of a ts library
only exposes the `.d.ts` files.
We rename this away from `es2015` since in practice it's a much
higher target these days. Additionally we no longer use the devmode
output but rather use the prodmode output which has the explicit
`.mjs` output- compatible with ESM.
PR Close#48521
The `__ESM_IMPORT_META_URL__` trick was used because we used both ESM
and CommonJS in this repo. It was an interop needed because
`import.meta.url` syntax couldn't be used as it woud have caused syntax
errors.
We still need to keep the CommonJS/ESM interop in the compiler-cli
because g3 relies on the compiler and uses CommonJS. This affects very
few places, just in the compiler- so this is acceptable.
PR Close#48521
Since this repo will now be strict ESM, and Angular Compiler packages
on NPM are also ESM-only, we can rework `ngc-wrapped` to remove
the CJS/ESM interop and we make it strict ESM too.
PR Close#48521
For standalone components it may be beneficial to group multiple declarations
into a single array, that can then be imported all at once in `Component.imports`.
If this array is declared within a library, however, would the AOT compiler
need to extract the contents of the array from the declaration file. This
requires that the array is constructed using an `as const` cast, which results
in a readonly tuple declaration in the generated .d.ts file of the library:
```ts
export declare const DECLARATIONS: readonly [typeof StandaloneDir];
```
The partial evaluator logic did not support this syntax, so this pattern was
not functional when a library is involved. This commit adds the necessary
logic in the static interpreter to evaluate this type at compile time.
Closes#48089
PR Close#48091
Because the language service uses the compiler, we try to produce as
much useful information as possible rather than throwing hard errors.
Hard errors cause the compiler to crash. While this can be acceptable
when compiling a program as part of a regular build, this is undesirable
for the language service.
PR Close#48314
The stricter checks under `strictInjectionParameters` in Angular 15 now enforce that
an inherited constructor must be compatible with DI, based on whether all parameters
are valid injection tokens. There is an issue when the constructor is inherited from
a class in a declaration file though, as information on the usage of `@Inject()` is
not present within a declaration file. This means that this stricter check cannot be
accurately performed, resulting in false positives.
This commit disables the stricter check to behave the same as it did prior to
Angular 15, therefore avoiding the false positive.
Fixes#48152
PR Close#48156
`getPotentialPipes` returns possible pipes which can be used in the provided context, whether already in scope or requiring an import.
This is necessary to implement auto-import support for pipes in the language service.
PR Close#48090
This commit updates the logic related to the attribute and property binding rules for <iframe> elements. There is a set of <iframe> attributes that may affect the behavior of an iframe and this change enforces that these attributes are only applied as static attributes, making sure that they are taken into account while creating an <iframe>.
If Angular detects that some of the security-sensitive attributes are applied as an attribute or property binding, it throws an error message, which contains the name of an attribute that is causing the problem and the name of a Component where an iframe is located.
BREAKING CHANGE:
Existing iframe usages may have security-sensitive attributes applied as an attribute or property binding in a template or via host bindings in a directive. Such usages would require an update to ensure compliance with the new stricter rules around iframe bindings.
PR Close#47964
Currently, when generating an import of a selector, the language service might crash if the compiler cannot emit a reference to the new symbol's file from the target component's file. (This might happen because the two are the same file.) We should handle that case by reusing the existing import if possible, or otherwise failing gracefully.
PR Close#47938
This reverts commit 2d08965b1a.
The reason for revert is that we've identified some issues with implementation. The issues will get addressed soon and the fix would be re-submitted.
PR Close#47959
This commit updates the logic related to the attribute order on iframes and makes the rules more strict. There is a set of iframe attributes that may affect the behavior of an iframe, this change enforces that these attributes are applied before an `src` or `srcdoc` attributes are applied to an iframe, so that they are taken into account.
If Angular detects that some of the attributes are set after the `src` or `srcdoc`, it throws an error message, which contains the name of ann attribute that is causing the problem and the name of a Component where an iframe is located. In most cases, it should be enough to change the order of attributes in a template to move the `src` or `srcdoc` ones to the very end.
BREAKING CHANGE:
Existing iframe usages may have `src` or `srcdoc` preceding other attributes. Such usages may need to be updated to ensure compliance with the new stricter rules around iframe bindings.
PR Close#47935
Currently `ngc-wrapped` mostly relies on any casts/or disabled
strictness checks to be able to use `tsickle`'s emit callback and
emit result merging for ngtsc. We should change this so that supertypes
of `ts.EmitResult` can be used in these optional callbacks- allowing us
to enable strictness checks in `packages/bazel/...` too.
PR Close#47893
Implements more of the runtime validations for host directives as compiler diagnostics so that they can be caught earlier. Also does some minor cleanup.
PR Close#47768
The supported Node.js versions for the `@angular/compiler-cli` package (^14.15.0 || >=16.10.0)
allow for the use of the `recursive` option of `mkdirSync`. Using the `recursive` option
removes the need to manually create each subdirectory in a given path.
PR Close#47678
This change aligns with the supported Node.js versions of the Angular CLI.
See: https://github.com/angular/angular-cli/pull/24026
BREAKING CHANGE: Angular no longer supports Node.js versions `14.[15-19].x` and `16.[10-12].x`. Current supported versions of Node.js are `14.20.x`, `16.13.x` and `18.10.x`.
PR Close#47730
In AOT compilations, the `strictInjectionParameters` compiler option can
be enabled to report errors when an `@Injectable` annotated class has a
constructor with parameters that do not provide an injection token, e.g.
only a primitive type or interface.
Since Ivy it's become required that any class with Angular behavior
(e.g. the `ngOnDestroy` lifecycle hook) is decorated using an Angular
decorator, which meant that `@Injectable()` may need to have been added
to abstract base classes. Doing so would then report an error if
`strictInjectionParameters` is enabled, if the abstract class has an
incompatible constructor for DI purposes. This may be fine though, as
a subclass may call the constructor explicitly without relying on
Angular's DI mechanism.
Therefore, this commit excludes abstract classes from the
`strictInjectionParameters` check. This avoids an error from being
reported at compile time. If the constructor ends up being used by
Angular's DI system at runtime, then the factory function of the
abstract class will throw an error by means of the `ɵɵinvalidFactory`
instruction.
In addition to the runtime error, this commit also analyzes the inheritance
chain of an injectable without a constructor to verify that their inherited
constructor is valid.
BREAKING CHANGE: Invalid constructors for DI may now report compilation errors
When a class inherits its constructor from a base class, the compiler may now
report an error when that constructor cannot be used for DI purposes. This may
either be because the base class is missing an Angular decorator such as
`@Injectable()` or `@Directive()`, or because the constructor contains parameters
which do not have an associated token (such as primitive types like `string`).
These situations used to behave unexpectedly at runtime, where the class may be
constructed without any of its constructor parameters, so this is now reported
as an error during compilation.
Any new errors that may be reported because of this change can be resolved either
by decorating the base class from which the constructor is inherited, or by adding
an explicit constructor to the class for which the error is reported.
Closes#37914
PR Close#44615
Updates the version range in the compiler to require at least TypeScript 4.8. Note that I'm keeping the backwards-compatibility layer for 4.7 around for now until internal projects have been migrated to 4.8.
BREAKING CHANGE:
TypeScript versions older than 4.8 are no longer supported.
PR Close#47690
Previously when a file was being analyzed to determine if a shim should
be generated, up to two calls to the host `fileExists` function per file
per generator were made. In the default host, each `fileExists` call made
two underlying file system calls. Following these calls, the file was then
read via `getSourceFile`. However, `getSourceFile` will return `undefined`
if the requested file does not exist. As a result, `getSourceFile` can be
used directly to request both potential file names and leverage the return
value to determine if the file does not exist. This avoids the need to call
`fileExists` at all.
PR Close#47682
`getPotentialImportsFor` returns an array of possible imports, including TypeScript module specifier and identifier name, for a requested trait in the context of a given component.
PR Close#47631
The previous commit 2e1dddec45 used `@ts-expect-error` to suppress the
current error, with the intent of being informed once that's no longer
an error, ie. when we updated to an upstream TS version that includes
this change.
However this unfortunately means the change is incompatible with the
fixed version, which prevents it from working with an updated TS version
in google3.
This change reverts back to the original `@ts-ignore` which is forwards
and backwards compatible, avoiding that problem (but unfortunately
losing the benefit of being notified once fixed).
PR Close#47636
`getPotentialTemplateDirectives` returns possible directives which can be used in the provided context, whether already in scope or requiring an import.
This is necessary to implement auto-import support for standalone components in the language service.
PR Close#47561
After implementing `getPotentialTemplateDirectives`, we will use this data struture to represent both in-scope and out-of-scope directives. So this rename is an advance cleanup.
PR Close#47561
The latest TypeScript compiler exposes the previously private field
`hasInvalidatedResolutions`. That breaks Angular in the newer TS,
because the new field would be required on DelegatingCompilerHost.
However we cannot just add the field here, because it's not present in
the older compiler.
This change adds the field for delegation, which works at runtime
because the field is present. It suppresses the compiler error using a
`// @ts-expect-error`, which should be removed once Angular moves to a
TSC version that includes this change.
PR Close#47585
When reporting type-checking diagnostics in external templates we create a
`ts.SourceFile` of the template text, as this is needed to report Angular
template diagnostics using TypeScript's diagnostics infrastructure. Each
reported diagnostic would create its own `ts.SourceFile`, resulting in
repeatedly parsing of the template text and potentially high memory usage
if the template is large and there are many diagnostics reported. This commit
caches the parsed template in the template mapping, such that all reported
diagnostics get to reuse the same `ts.SourceFile`.
Closes#47470
PR Close#47471
This commit adds a re-export of the `NgForOf` class as `NgFor` to improve the DX for cases when the directive is used as standalone. Developers can import `NgFor` class, which better matches the `ngFor` attribute used in a template.
PR Close#47309
Using raw objects as a lookup structure will inadvertently find methods defined on
`Object`, where strings are expected. This causes errors downstream when string
operations are applied on functions.
This commit switches over to use `Map`s in the DOM element schema registry to fix
this category of issues.
Fixes#46936
PR Close#47220
When the Angular compiler emits a diagnostic in a template file, it
forces TypeScript to parse that template. Templates are not TypeScript,
so this parse finds a bunch of parsing errors, which Angular then
ignores and we show the diagnostic anyways because we have more context.
This can lead to strange behavior in TypeScript because templates are so
weird that it can break the parser and crash the whole compiler.
For example, certain Angular templates can encounter failures fixed by
microsoft/TypeScript#45987, which are not easily debuggable and require
a TS upgrade to fix.
This commit introduces logic to handle the error gracefully, by falling
back to report the template error on the component class itself. The
diagnostic is extended to still reference the template location and
includes the failure's stack trace, to allow the parsing failure to be
reported to TypeScript (as parsing should in theory not cause a crash).
Closes#43970
PR Close#44001
This option has no longer any effect as Ivy is the only rendering engine.
BREAKING CHANGE: Angular compiler option `enableIvy` has been removed as Ivy is the only rendering engine.
PR Close#47346
This is the compile-time implementation of the `hostDirectives` feature plus a little bit of runtime code to illustrate how the newly-generated code will plug into the runtime. It works by creating a call to the new `ɵɵHostDirectivesFeature` feature whenever a directive has a `hostDirectives` field. Afterwards `ɵɵHostDirectivesFeature` will patch a new function onto the directive definition that will be invoked during directive matching.
For example, if we take the following definition:
```ts
@Directive({
hostDirectives: [HostA, {directive: HostB, inputs: ['input: alias']}]
})
class MyDir {}
```
Will compile to:
```js
MyDir.ɵdir = ɵɵdefineComponent({
features: [ɵɵHostDirectivesFeature([HostA, {
directive: HostB,
inputs: {
input: "alias"
}
}])]
});
```
The template type checking is implemented during directive matching by adding the host directives applied on the host to the array of matched directives whenever the host is matched in a template.
Relates to #8785.
PR Close#46868
This helper accepts a class for an Angular trait, and returns the NgModule which owns that trait. This will be useful for the language service import project, which needs to edit import arrays on the module.
PR Close#47166
Replaces (almost) all of the usages of the deprecated `getMutableClone` function from TypeScript which has started to log deprecation warnings in version 4.8 and will likely be removed in version 5.0. The one place we have left is in the default import handling of ngtsc which will be more difficult to remove.
PR Close#47167
This helper accepts a class, and returns the primary Angular Decorator associated with that trait (e.g. the Component, Pipe, Directive, or NgModule decorator). This will be useful for the language service import project, which needs to edit import arrays inside the decorator.
PR Close#47180
Adds support for TypeScript 4.8 and resolves some issues that came up as a result of the update.
Most of the issues came from some changes in TypeScript where the `decorators` and `modifiers` properties were removed from most node types, and were combined into a single `modifiers` array. Since we need to continue supporting TS 4.6 and 4.7 until v15, I ended up creating a new `ngtsc/ts_compatibility` directory to make it easier to reuse the new backwards-compatible code.
PR Close#47038
Updates the tsickle version in the repository and accounts for its changes in
the `compiler-cli` package. Tsickle made a breaking change in the minor version
segment bump that would break the use with `@angular/compiler-cli`
Additionally the tsickle version for `@angular/bazel` is updated since
we updated `@bazel/typescript` to also account for the breaking changes.
See: 78a0528107
PR Close#47018
The diagnostic of the component missing member comes from the ts service,
so the all code fixes for it are delegated to the ts service.
The code fixes are placed in the LS package because only LS can benefit from
it now, and The LS knows how to provide code fixes by the diagnostic and NgCompiler.
The class `CodeFixes` is useful to extend the code fixes if LS needs to
provide more code fixes for the template in the future. The ts service uses
the same way to provide code fixes.
1622247636/src/services/codeFixProvider.ts (L22)
Fixes https://github.com/angular/vscode-ng-language-service/issues/1610
PR Close#46764
improve the error message for non-standalone components which are not
exported from their module, and that are also imported directly as if
they were standalone
this change simply adds the suggestion to the developer to import the
ngModule instead
resolves#46004
PR Close#46114
The source-map package now requires the
`SourceMapConsumer`/`SourceMapGenerator` classes to be instantiated
asynchronously. This commit updates our tests to account for that.
PR Close#46888
The source-map package is no longer explicitly used in the
`compiler-cli` package and therefore can be removed from the ESBuild
bundling, denoting it as external. This should be a noop.
PR Close#46888
The extended diagnostics about missing control flow directive was only mentioning that the `CommonModule` should be imported.
Now that the control flow directives are available as standalone, the message mentions that directive itself can be imported.
The message now also mentions which import should be used for the directive (as it can be tricky to figure out that `NgForOf` is the directive corresponding to `*ngFor`).
PR Close#46846
After a bugfix in #46096, the compiler is now better capable of detecting pipes
which require an inline type constructor. However, there is an issue in how all
pipes are considered when verifying the inline type-ctor requirement: it should
only check actually used pipes.
Fixes#46747
PR Close#46807
This commit adds an extended diagnostics check that is similar to the nullish
coalescing check, but targeting optional chains. If the receiver expression
of the optional chain is non-nullable, then the extended diagnostic can report
an error or warning that can be fixed by changing the optional chain into a
regular access.
Closes#44870
PR Close#46686
This commit adds the `createNgModuleRef` function alias to the public API. The alias is called `createNgModule`. The `createNgModule` name is more consistent with the rest of the API surface, where functions that return `*Ref`s don't include the `Ref` into the function name, for example: `createPlatform`, `ViewContainerRef.createComponent`, etc.
DEPRECATED:
The `createNgModuleRef` is deprecated in favor of newly added `createNgModule` one.
PR Close#46789
This commit adds an extended diagnostic which warns when style suffixes such as '.px'
are used with attribute bindings (attr.width.px).
Fixes#36256
PR Close#46651
In the case that a user accidentally forgot the let keyword, they dont get a very clear indicator of there being a problem.
They get an issue in the template iteration at runtime. This diagnostic will warn the user when the let keyword is missing.
PR Close#46683
https://angular.io/guide/attribute-binding#attribute-class-and-style-bindings
Angular supports `attr.`, `style.`, and `class.` binding prefixes to
bind attributes, styles, and classes. If the key does not have the
binding syntax `[]` or the value does not have an interpolation `{{}}`,
the attribute will not be interpreted as a binding.
This diagnostic warns the user when the attributes listed above will not
be interpreted as bindings.
resolves#46137
PR Close#46161
In Bazel worker-land, workers which use incremental compilation must still
emit all declared outputs and cannot rely on these outputs persisting from
previous builds.
This commit adds a flag to `performCompilation` which can be used by the
worker infrastructure to instruct the compiler to always emit all possible
output files, regardless of any incremental build optimizations.
PR Close#46355
This commit adds an extended diagnostics check that verifies that all control flow directives (such as `ngIf`, `ngFor`) have the necessary directives imported in standalone components. Currently there is no diagnostics produced for such cases, which makes it harder to detect and find problems.
PR Close#46146
An inline type-check block is required when a reference to a component class
cannot be emitted from an ngtypecheck shim file, but the logic to detect this
situation did not consider the configured `rootDir`. When a `rootDir` is
configured the reference emitter does not allow generating an import outside
this directory, which meant that a shim file wouldn't be able to reference
the component class. Consequently, type-check block generation would fail
with a fatal error that is unaccounted for, as gathering diagnostics should
be non-fallible.
This commit fixes the problem by leveraging the existing `canReferenceType`
logic of the type-checking `Environment`, instead of the rudimentary check
whether the class is exported as top-level symbol (`checkIfClassIsExported`).
Instead, `canReferenceType` pre-flights the generation of an import using the
`ReferenceEmitter` to tell exactly whether it will succeed or not; thus taking
into account the `rootDirs` constraint as well.
Fixes#44999
PR Close#46096
Saves us some bytes by not emitting `providers` in `defineInjector`. While the amount of bytes isn't huge, I think that this change is worthwhile, because `ng generate` currently generates `providers: []` with every `NgModule` which users can forget to remove.
PR Close#46301
When generating .d.ts metadata for NgModules, by default we emit type
references to their declarations, imports, and exports. However, this
information is not necessarily useful to consumers. References to private
directives (those that aren't exported by the NgModule) for example aren't
at all useful as they can only affect other components declared in the
NgModule. References to imports are of limited usefulness - they might be
helpful for an IDE to understand the DI structure of an application, but
aren't at all used by a downstream compiler.
Generating this metadata is not without cost. When an incremental build
system uses changes in inputs to determine when a rebuild is necessary, any
changes in .d.ts files might cause downstream targets to rebuild. If those
.d.ts changes are in the "private" side of the NgModule (imports or non-
exported directives/pipes), then these rebuilds are wholly unnecessary.
This commit introduces the `onlyPublishPublicTypingsForNgModules` flag for
the compiler. When this flag is set, the compiler will filter the emitted
references in NgModule .d.ts output and only reference those directives/
pipes that are exported from the NgModule (its public API surface). Omitting
the flag preserves the existing behavior of emitting all references, both
public and private.
This is especially useful for build systems such as Bazel.
PR Close#45894
This commit updates the error message to use correct info depending on whether a component is standalone or not. Previously we were always referring to @NgModules as a place to fix the issue, but not we also mention @Component when needed (for standalone components).
PR Close#46159
Angular generally supports cycles between components in the same NgModule.
We have a mechanism of moving the component scope declaration into the
NgModule file in this case. This ensures that Angular never itself
introduces an import which creates a cycle.
What happens if the cycle already exists in the user's program, though, is a
bit different. In these cases, the "correct" emit for Angular is to generate
the component scope (whether direct or remote) inside of a closure, to
prevent evaluating the scope's references until module evaluation is
complete and all cyclic imports have been resolved. We don't want to do this
for *all* scopes because the code size cost of emitting a function wrapper
is non-zero.
In this fix, we take the presence of a `forwardRef` in a component's
`imports` or in an NgModule `declarations` or `imports` as a sign that
component scopes emitted into those files need to be protected against
cyclic references. In a future commit, we may introduce a warning or error
if cyclic imports are not protected behind `forwardRef` in these cases, but
this will take some time to implement.
PR Close#46139
This commit improves the reported error when importing e.g. `RouterModule.forRoot()`
from within `Component.imports`. Such import is not supported, as standalone components
can only refer to other standalone entities or NgModules in their `imports` array;
`ModuleWithProviders` are not supported as `Component.imports` is meant to be used
for the compilation scope of the component, _not_ for configuring DI.
Closes#46003
PR Close#46009
This commit moves the foreign function resolver logic for detecting a
`ModuleWithProviders` in a return type position of a function call, as the logic can
then be reused for standalone components in a subsequent commit.
PR Close#46009
The formatting of the `babel_ast_host.ts` file is invalid due to a
recently-merged PR. The PR had a passing `lint` state but this seemed
to just appear like this because the Git comparison range on upstream
branches can become invalid (due to a known bug in CircleCI -- reported)
PR Close#46082
update the error message presented during aot compilation when an unrecognized
tag/element is found in a standalone component so that it does not mention
the ngModule anymore
Note: the jit variant is present in PR #45920resolves#45818
PR Close#45919
This commit accounts for the Babel types changes. Some properties
can now also be `undefined` so existing checks/assertions had to
be adjusted to also capture `undefined` (along with `null`).
Additionally, in preparation for a new ECMA proposal, Babel types
seem to have been updated to include private names in object property
keys. This is not necessarily the case for object expressions, but
could be for object patterns (in the future -- when implemented).
More details: https://github.com/babel/babel/pull/14304 and
https://github.com/tc39/proposal-destructuring-private.
PR Close#45967
This commit fixes a small issue in the logic around the calculation of
template scopes for standalone components. These scopes include a
`Reference` for each dependency of a standalone component, which is used to
generate references to that dependency in various contexts.
Previously, the `Reference` used for a dependency was the one generated from
its own metadata. For example, a referenced directive used the `Reference`
that was created when analyzing the directive declaration itself. This still
works, as the compiler is always able to emit a reference to any valid
`Reference`. However, it's not optimal.
The `Reference` which should be used instead is the one generated from
analyzing the standalone component's `imports` array, which has knowledge of
how the dependency is referenced from within the standalone component's file
itself. This allows the compiler to skip creating a new import for the
dependency when emitting the standalone component, and use the existing,
user-authored import instead. This saves on code size and avoids taxing the
bundler with unnecessary imports.
PR Close#46029
The Angular compiler performs cycle detection when generating imports within
component files. This was previously necessary as reifying dependencies
discovered via NgModules into the component output could add imports that
weren't present in the original component and potentially create cycles.
Doing this could cause order-of-execution issues with existing user imports,
so the compiler detects this case and falls back to an alternative way of
specifying component dependencies that doesn't risk creating cycles.
For standalone components, Angular does not need to add new imports to the
component file as the user has already explicitly referenced dependencies
in the `@Component.imports`. As a result, the cycle detection can be
skipped.
Correctly authoring a program with import cycles is always challenging. One
side of a cyclic import will always initially evaluate to `undefined`, and
this can result in errors in the component definition when this happens
within component `imports`.
Our compiler _could_ detect the cycle and choose to wrap the component
dependencies in an automatic closure instead, avoiding any issues with
`undefined` during an eager evaluation. However, this commit makes an active
choice not to do that as it only serves to mask the problems with cyclic
imports. Future refactorings may cause the "other half" of the cycle to
break. Users should instead be aware of the potential problems with cycles
and explicitly defer evaluations with `forwardRef` where needed. This
ensures that future implementations of Angular compilation which may not be
able to automatically detect import cycles and correct accordingly can still
compile such components.
PR Close#46029
When an external template is read, adds the template file to to the project which contains.
This is necessary to keep the projects open when navigating away from HTML files.
Since a `tsconfig` cannot express including non-TS files,
we need another way to indicate the template files are considered part of the project.
Note that this does not ensure that the project in question _directly_ contains the component
file. That is, the project might just include the component file through the program rather
than directly in the `include` glob of the `tsconfig`. This distinction is somewhat important
because the TypeScript language service/server prefers projects which _directly_ contain the TS
file (see `projectContainsInfoDirectly` in the TS codebase). What this means it that there can
possibly be a different project used between the TS and HTML files.
For example, in Nx projects, the referenced configs are `tsconfig.app.json` and
`tsconfig.editor.json`. `tsconfig.app.json` comes first in the base `tsconfig.json` and
contains the entry point of the app. `tsconfig.editor.json` contains the `**.ts` glob of all TS
files. This means that `tsconfig.editor.json` will be preferred by the TS server for TS files
but the `tsconfig.app.json` will be used for HTML files since it comes first and we cannot
effectively express `projectContainsInfoDirectly` for HTML files.
We could consider also updating the language server implementation to attempt
to select the project to use for the template file based on which project
contains its component file directly, using either the internal `project.projectContainsInfoDirectly`
or as a workaround, check `project.isRoot(componentTsFile)`.
Finally, keeping the projects open is hugely important in the solution style config case like
Nx. When a TS file is opened, TypeScript will only retain `tsconfig.editor.json` and not
`tsconfig.app.json`. However, if our extension does not also know to select
`tsconfig.editor.json`, it will automatically select `tsconfig.app.json` since it is defined
first in the `tsconfig.json` file. So we need to teach TS server that we are (1) interested in
keeping projects open when there is an HTML file open and (2) optionally attempt to do this
_only_ for projects that we know the TS language service will prioritize in TS files (i.e.,
attempt to only keep `tsconfig.editor.json` open and allow `tsconfig.app.json` to close)
and prioritize that project for all requests.
fixes https://github.com/angular/vscode-ng-language-service/issues/1623
fixes https://github.com/angular/vscode-ng-language-service/issues/876
PR Close#45601
In PR #45405, the Angular Package Format (APF) was updated so that
secondary entry-points (such as `@angular/common/http`) do not have
their own `package.json` file, as they used to. Instead, the paths to
their various formats and types are exposed via the primary
`package.json` file's `exports` property. As an example, see the v13
[@angular/common/http/package.json][1] and compare it with the v14
[@angular/common/package.json > exports][2].
Previously, `ngcc` was not able to analyze such v14+ entry-points and
would instead error as it considered such entry-points missing.
This commit addresses the issue by detecting this situation and
synthesizing a `package.json` file for the secondary entry-points based
on the `exports` property of the primary `package.json` file. This data
is only used by `ngcc` in order to determine that the entry-point does
not need further processing, since it is already in Ivy format.
[1]: https://unpkg.com/browse/@angular/common@13.3.5/http/package.json
[2]: https://unpkg.com/browse/@angular/common@14.0.0-next.15/package.json
PR Close#45833
Move the `loadPackageJson()` helper (and associated generic types, such
as `JsonObject`) from `packages/entry_point.ts` to `utils.ts` and also
rename it to `loadJson()`. This way, they can be used in other places in
future commits, without introducing cyclical dependencies.
PR Close#45833
The NodeJS Bazel linker does not work well on Windows because there
is no sandboxing and linker processes from different tests will attempt
to modify the same `node_modules`, causing concurrency race conditions
and resulting in flakiness.
PR Close#45872
This commit improves the error message for using `imports` on a component
that isn't set to `standalone: true`. Two concrete improvements are made:
* A related information message is added to the diagnostic which suggests
the fix of adding `standalone: true`.
* The component is marked as poisoned, preventing other errors which might
be caused by an incorrectly configured template scope from being generated
and thus masking the original problem.
Fixes#45850
PR Close#45851
In AOT compilations, the `strictInjectionParameters` compiler option can
be enabled to report errors when an `@Injectable` annotated class has a
constructor with parameters that do not provide an injection token, e.g.
only a primitive type or interface.
Since Ivy it's become required that any class with Angular behavior
(e.g. the `ngOnDestroy` lifecycle hook) is decorated using an Angular
decorator, which meant that `@Injectable()` may need to have been added
to abstract base classes. Doing so would then report an error if
`strictInjectionParameters` is enabled, if the abstract class has an
incompatible constructor for DI purposes. This may be fine though, as
a subclass may call the constructor explicitly without relying on
Angular's DI mechanism.
Therefore, this commit excludes abstract classes from the
`strictInjectionParameters` check. This avoids an error from being
reported at compile time. If the constructor ends up being used by
Angular's DI system at runtime, then the factory function of the
abstract class will throw an error by means of the `ɵɵinvalidFactory`
instruction.
In addition to the runtime error, this commit also analyzes the inheritance
chain of an injectable without a constructor to verify that their inherited
constructor is valid.
Closes#37914
PR Close#44615
Excludes styles that resolve to empty strings from the emitted metadata so that they don't result in empty `<style>` tags at runtime.
Fixes#31191.
PR Close#45459
Changes the message from:
```
The component 'HelloComponent' appears in 'imports', but is not standalone
and cannot be imported directly It must be imported via an NgModule.
```
to
```
The component 'HelloComponent' appears in 'imports', but is not standalone
and cannot be imported directly. It must be imported via an NgModule.
```
PR Close#45827
The analysis phase of the compiler should operate on individual classes, independently
of the analysis of other classes. The validation that `Component.imports` only
contains standalone entities or NgModules however did happen during the analysis phase,
introducing a dependency on other classes and causing inconsistencies due to ordering
and/or asynchronous timing differences.
This commit fixes the issue by moving the validation to the resolve phase, which occurs
after all classes have been analyzed.
Fixes#45819
PR Close#45827
This commit updates the logic to detect a situation when a standalone component is used in the NgModule-based bootstrap (`@NgModule.bootstrap`). Both AOT and JIT compilers are updated to handle this situation.
PR Close#45825
In v14, the partial compilation output of components have changed in a way
that prevents older versions of Angular to compile the partial declarations
correctly.
In particular, we used to emit used directives/components in separate arrays called
`components` and `directives`, and used pipes in a property called `pipes`:
```js
TestComponent.ɵcmp = i0.ɵɵngDeclareComponent({
minVersion: "12.0.0",
version: "13.3.0",
type: TestComponent,
selector: "ng-component",
ngImport: i0,
template: ``,
isInline: true,
directives: [{ type: i1.SomeDir, selector: "[some-dir]" }],
components: [{ type: i1.SomeCmp, selector: "some-cmp" }],
pipes: { 'async': i2.AsyncPipe },
});
```
In the above example, the `version` property indicates which exact compiler
version was used to compile the component, but the `minVersion` allows older
versions of the compiler/Angular linker to "link" the partial declaration to
its final AOT compilation output.
In v14, the used directives, components and pipes are now emitted together
into a single array under the `dependencies` property:
```js
TestComponent.ɵcmp = i0.ɵɵngDeclareComponent({
minVersion: "12.0.0",
version: "13.3.0",
type: TestComponent,
selector: "ng-component",
ngImport: i0,
template: ``,
isInline: true,
dependencies: [
{ kind: "directive", type: i1.SomeDir, selector: "[some-dir]" },
{ kind: "component", type: i1.SomeCmp, selector: "some-cmp" },
{ kind: "pipe", type: i2.AsyncPipe },
],
});
```
This change has been made in support of standalone components, but it does mean
that older compiler versions can no longer link these partial declarations
as desirable as none of the components, directives and pipes would be included
in the AOT-compiled code.
By increasing the `minVersion` property, we hint to older compiler versions that
they are not capable of processing the partial declaration. This allows reporting
an error at compile time instead of resulting in runtime failures due to missing
components, directives and pipes.
PR Close#45782
Adds support for TypeScript 4.7. Changes include:
* Bumping the TS version as well as some Bazel dependencies to include https://github.com/bazelbuild/rules_nodejs/pull/3420.
* Adding a backwards-compatibility layer for calls to `updateTypeParameterDeclaration`.
* Making `LView` generic in order to make it easier to type the context based on the usage. Currently the context can be 4 different types which coupled with stricter type checking would required a lot of extra casting all over `core`.
* Fixing a bunch of miscellaneous type errors.
* Removing assertions of `ReferenceEntry.isDefinition` in a few of the language service tests. The field isn't returned by TS anymore and we weren't using it for anything.
* Resolving in error in the language service that was caused by TS attempting to parse HTML files when we try to open them. Previous TS was silently setting them as `ScriptKind.Unknown` and ignoring the errors, but now it throws. I've worked around it by setting them as `ScriptKind.JSX`.
PR Close#45749
Before standalone, everything that could appear in an NgModule's `imports`
was relevant to DI, and needed to be emitted in the `imports` of the
generated `InjectorDef` definition. With the introduction of standalone
types, NgModule `imports` can now contain components, directives, and pipes
which are standalone. Only standalone components need to be included in
the `imports` of the generated injector definition - directives and pipes
have no effect on DI. Having them present doesn't cause any errors in the
runtime (they're filtered out by the injector itself) but it does prevent
tree-shaking.
With this commit, the generation of `InjectorDef` now filters the `imports`
to exclude directives and pipes as much as possible. It's not _always_
possible because an expression in `imports` may pull in both a directive and
a `ModuleWithProviders` reference, and we have no way of referencing just
the MWP part of that expression. Therefore this is an optimization, not a
rule of `InjectorDef` compilation.
PR Close#45701
Previously, the NgModule handler would resolve the `imports` field as one
unit, producing an array of `Reference`s. With this refactoring, if
`imports` is a literal array, each individual element will be resolved
independently. This will allow filtering in the future at the element level,
since there will be a separate `ts.Expression` for each individual element.
PR Close#45701
This commit updates the `ForeignFunctionResolver` used by the NgModule
handler to resolve `ModuleWithProvider` types. Previously, this resolver
returned the NgModule `Reference` directly, but there are two problems with
this:
* It's not completely accurate, as the expression returned by the MWP call
will not return the NgModule at runtime.
* We need the ability to distinguish the MWP call itself from an ordinary
NgModule reference in future optimizations.
PR Close#45701
This commit reworks the partial evaluation system's concept of a
ForeignFunctionResolver. Previously, resolvers were expected to return a
`ts.Expression` which the partial evaluator would continue evaluating,
eventually returning a value.
This works well for "transparent" foreign functions like `forwardRef`,
but for things like `ModuleWithProviders` it breaks down, because the
desired resolution value (the NgModule `Reference`) is _not_ the "correct"
evaluation of the function call.
To support better FFR implementations, this commit refactors the FFR system
so that resolvers operate on the `ts.CallExpression` instead, and are
given a callback to resolve further expressions if needed. If they cannot
resolve a given call expression, they have an `unresolvable` value that they
can return to indicate that.
PR Close#45701
This commit bundles tests for standalone components that are possible after
previous implementation commits. Most new tests are compliance tests, but
a test is also included to validate that the template type-checking system
can work with standalone components as well.
PR Close#45672
This commit adds a type field to .d.ts metadata for directives, components,
and pipes which carries a boolean literal indicating whether the given type
is standalone or not. For backwards compatibility, this flag defaults to
`false`.
Tests are added to validate that standalone types coming from .d.ts files
can be correctly imported into new standalone components.
PR Close#45672
This commit propagates the `isStandalone` flag for a component, directive,
or pipe during partial compilation of a standalone declaration. This flag
allows the linker to properly process a standalone declaration that it
encounters.
PR Close#45672
Standalone component scopes were first implemented in the
`ComponentDecoratorHandler` itself, due to an assumption that "standalone"
allowed for a localized analysis of the component's dependencies. However,
this is not strictly true. Other compiler machinery also needs to understand
component scopes, including standalone component scopes. A good example is
the template type-checking engine, which uses a `ComponentScopeReader` to
build full metadata objects (that is, metadata that considers the entire
inheritance chain) for type-checking purposes. Therefore, the
`ComponentScopeReader` should be able to give the scope for a standalone
component.
To achieve this, a new `StandaloneComponentScopeReader` is implemented, and
the return type of `ComponentScopeReader.getScopeForComponent` is expanded
to express standalone scopes. This cleanly integrates the "standalone"
concept into the existing machinery.
PR Close#45672
This commit expands on the unified dependency tracking in the previous
commit and adds tracking of NgModule dependencies. These are not used for
standard components, but are emitted for standalone components to allow the
runtime to roll up providers from those NgModules into standalone injectors.
PR Close#45672
Previously, the compiler tracked directives and pipes in template scopes
separately. This commit refactors the scope system to unify them into a
single data structure, disambiguated by a `kind` field.
PR Close#45672
Previously, the compiler would represent template dependencies of a
component in its component definition through separate fields (`directives`,
`pipes`).
This commit refactors the compiler/runtime interface to use a single field
(`dependencies`). The runtime component definition object still has separate
`directiveDefs` and `pipeDefs`, which are calculated from the `dependencies`
when the definition is evaluated.
This change is also reflected in partially compiled declarations. To ensure
compatibility with partially compiled code already on NPM, the linker
will still honor the old form of declaration (with separate fields).
PR Close#45672
`PipeSymbol` contains logic to detect changes in the public API surface of
pipes, which includes the pipe name. However, the pipe handler inadvertently
uses the pipe class name instead of the actual pipe name to initialize the
`PipeSymbol`, which breaks incremental compilation when pipe names change.
There is a test which attempts to verify that this logic is working, but the
test actually passes for a different reason. The test swaps the names of 2
pipes that are both used in a component, and asserts that the component is
re-emitted, theoretically because the public APIs of the pipes is changed.
However, the emit order of the references to the pipes depends on the order
in which they match in the template, which changes when the names are
swapped. This ordering dependency is picked up by the semantic dependency
tracking system, and is what actually causes the component to be re-emitted
and therefore the pipe test to pass in spite of the bug with name tracking.
This commit fixes the `PipeSymbol` initialization to use the correct pipe
name. The test is still flawed in that it's sensitive to the ordering of
pipe emits, but this ordering is due to change soon as a result of the
standalone components work, so this issue will be resolved in a future
commit.
PR Close#45672
This commit adds a new internal scope to `R3Injector` for
`EnvironmentInjector`s specifically. This will allow us to scope services to
the environment side of the injector hierarchy specifically, as opposed to
the `'any'` scope which also includes view-side injectors created via
`Injector.create`. For now, this functionality is not exposed publicly, but
is available to use within `@angular/core` only.
PR Close#45626
This links back each placeholder in a message to the original Angular template span which defines its expression. This is useful for understanding where each placeholder comes from in the context of the full message.
PR Close#45606
This commit fixes an inconsistency where a type check location for an inline
type check block would be interpreted to occur in a type-checking shim instead.
This resulted in a missing template mapping, causing a crash due to an unsafe
non-null assertion operator.
In the prior commit the `TcbLocation` has been extended with an `isShimFile`
field that is now being used to look for the template mapping in the correct
location. Additionally, the non-null assertion operator is refactored such
that a missing template mapping will now ignore the warning instead of crashing
the compiler.
Fixes#45413
PR Close#45454
Extends `TcbPosition` with a field that indicates whether the `tcbPath` is a
type-checking shim file, or an original source file with an inline type check
block.
This field is used in an upcoming commit that fixes an inconsistency with how
inline type check blocks are incorrectly interpreted as a type-checking shim
file instead.
PR Close#45454
Inline type check blocks (TCBs) are emitted into the original source file, but
node positions would still be represented as a `ShimLocation` with a `shimPath`
corresponding with the type-checking shim file. This results in inconsistencies,
as the `positionInShimFile` field of `ShimLocation` would not correspond with
the `shimPath` of that `ShimLocation`.
This commit is a precursor to letting `ShimLocation` also represent the correct
location for inline type check blocks, by renaming the interface to
`TcbLocation`. A followup commit addresses the actual inconsistency.
PR Close#45454
This commit carries the `standalone` flag forward from a directive/pipe
into its generated directive/pipe definition, allowing the runtime to
recognize standalone entities.
PR Close#44973
This commit implements the next step of Angular's "standalone" functionality,
by allowing directives/components/pipes declared as `standalone` to be imported
into NgModules. Errors are raised when such a type is not standalone but is
included in an NgModule's imports.
PR Close#44973
This commit moves the error for declaring a standalone directive/component/
pipe to the `LocalModuleScopeRegistry`. Previously the error was produced
by the `NgModuleHandler` directly.
Producing the error in the scope registry allows the scope to be marked as
poisoned when the error occurs, preventing spurious downstream errors from
surfacing.
PR Close#44973
This commit improves the error messages generated by the compiler when NgModule
scope analysis finds structural issues within a compilation. In particular,
errors are now shown on a node within the metadata of the NgModule which
produced the error, as opposed to the node of the erroneous declaration/import/
export. For example, if an NgModule declares `declarations: [FooCmp]` and
`FooCmp` is not annotated as a directive, component, or pipe, the error is now
shown on the reference to `FooCmp` in the `declarations` array expression.
Previously, the error would have been shown on `FooCmp` itself, with a mention
in the error text of the NgModule name.
Additional error context in some cases has been moved to related information
attached to the diagnostic, which further improves the legibility of such
errors. Error text has also been adjusted to be more succinct, since more info
about the error is now delivered through context.
PR Close#44973
Before the `SemanticSymbol` system which now powers incremental compilation,
the compiler previously needed to track which NgModules contributed to the
scope of a component in order to recompile correctly if something changed.
This commit removes that legacy field (which had no consumers) as well as the
logic to populate it.
PR Close#44973
Recent changes in `rules_nodejs` caused the test case copy file actions
to be transitioned into the `exec` configuration, resulting in much larger
file paths. These paths break on Windows with the shell argument limit, and
with the path limit, causing errors like:
```
ERROR: C:/users/circleci/ng/packages/compiler-cli/test/compliance/test_cases/BUILD.bazel:9:12: Copying file packages/compiler-cli/test/compliance/test_cases/r3_compiler_compliance/components_and_directives/value_composition/structural_directives_if_directive_def.js failed: (Exit 1): cmd.exe failed: error executing command
cd /d C:/users/circleci/_bazel_circleci/u4uoan2j/execroot/angular
SET PATH=C:\Program Files\Git\usr\bin;C:\Program Files\Git\bin;C:\Windows;C:\Windows\System32;C:\Windows\System32\WindowsPowerShell\v1.0
SET RUNFILES_MANIFEST_ONLY=1
cmd.exe /C bazel-out\x64_windows-opt-exec-2B5CBBC6\bin\packages\compiler-cli\test\compliance\test_cases\test_cases--1973427149-cmd.bat
The system cannot find the path specified
```
https://app.circleci.com/pipelines/github/angular/angular/44038/workflows/4b530cb2-f232-4e1d-b35a-e6e085151d08/jobs/1140017
PR Close#45431
As mentioned in previous commits (check them for more details), `@bazel/typescript`
no longer contains `ts_library`-specific code, so we no longer need that dependency.
PR Close#45431
.substr() is deprecated so we replace it with functions which work similarily but aren't deprecated
Signed-off-by: Tobias Speicher <rootcommander@gmail.com>
PR Close#45397
When we have an event listener inside an embedded view, we generate a `restoreView` call which saves the view inside of the LFrame. The problem is that we don't clear it until it gets overwritten which can lead to memory leaks.
These changes rework the generated code in order to generate a `resetView` call which will clear the view from the LFrame.
Fixes#42848.
PR Close#43075
Drops support for TypeScript older than 4.6 and removes some workarounds in the compiler.
BREAKING CHANGE:
TypeScript versions older than 4.6 are no longer supported.
PR Close#45394
In early versions of Angular, it was sometimes necessary to provide a
`moduleId` to `@Component` metadata, and the common pattern for doing this
was to set `moduleId: module.id`. This relied on the bundler to fill in a
value for `module.id`.
However, due to the superficial similarity between `Component.moduleId` and
`NgModule.id`, many users ended up setting `id: module.id` in their
NgModules. This is an anti-pattern that has a few negative effects,
including preventing the NgModule from tree-shaking properly.
This commit changes the compiler to ignore `id: module.id` in NgModules, and
instead provide a warning which suggests removing the line entirely.
PR Close#45024
Previously, the `TraitCompiler` would naively consider a compilation as
failed if either analysis or resolution produced any diagnostics. This
commit adjusts the logic to only consider error diagnostics, which allows
warnings to be produced from `DecoratorHandler`s.
This is a precursor commit to introducing such a warning. As such, the
logic here will be tested in the next commit.
PR Close#45024
Angular contains an NgModule registry, which allows a user to declare
NgModules with string ids and retrieve them via those ids, using the
`getNgModuleById` API.
Previously, we attempted to structure this registration in a clever fashion
to allow for tree-shaking of registered NgModules (that is, those with ids).
This sort of worked due to the accidental alignment of behaviors from the
different tree-shakers involved. However, this trick relies on the
generation of `.ngfactory` files and how they're specifically processed in
various bundling scenarios. We intend to remove `.ngfactory` files, hence
we can no longer rely on them in this way.
The correct solution here is to recognize that `@NgModule({id})` is
inherently declaring a global side-effect, and such classes should not
really be eligible for tree-shaking in the first place. This commit removes
all the old registration machinery, and standardizes on generating a side-
effectful call to `registerNgModuleType` for NgModules that have ids.
There is some risk here that NgModules with unnecessary `id`s may not
tree-shake as a result of this change, whereas they would have in previous
circumstances. The fix here should be to remove the `id` if it's not needed.
Specifying an `id` is a request that the NgModule be retained regardless of
any other references, in case it is later looked up by string id.
PR Close#45024
When `@angular/compiler` processes metadata and compiles a definition field,
it might also choose to return statements that are associated with that
definition, and should be included after the type being compiled. Currently,
the linker ignores these statements, as there are none generated that are
relevant in the linking operation.
A challenge to supporting such associated statements is that the linker
operates on "declare" expressions, and replaces those expressions with other
expressions. It does not have the capability to append statements after the
whole type. The linker actually faces this challenge with statements from
the `ConstantPool` as well, and solves this problem by generating an IIFE
expression that executes the statements and then returns the definition
expression.
Previously, an `EmitScope` processed the definition and converted it to an
expression, as well as collected constant statements from a `ConstantPool`.
A special `IifeEmitScope` implementation was used when emitting into a
context where top-level constant statements couldn't be added at all, and
uses the IIFE strategy in this case.
This commit adds blanket support for associated statements to the linker
using this IIFE strategy. The main `EmitScope` now uses the IIFE strategy to
emit associated statements, and `IifeEmitScope` has been renamed to
`LocalEmitScope`. Now, the `LocalEmitScope` represents constant statements
as associated statements to the main `EmitScope` implementation, so they
get included in the IIFE as well.
Tests are adjusted/added to cover this new behavior. This is a refactoring
commit because no live generated code is affected - there are no cases where
associated statements are present in linked definitions today.
PR Close#45024
The `compileNgModule` operation previously supported a flag `emitInline`,
which controlled whether template scoping information for the NgModule was
emitted directly into the compiled NgModule definition, or whether an
associated statement was generated which patched the information onto the
NgModule definition. Both options are useful in different contexts.
This commit changes this flag to an enum (and renames it), which allows for
a third option - do not emit any template scoping information. This option
is added to better represent the actual behavior of the Angular Linker,
which sometimes configures `compileNgModule` to use the side-effectful
statement generation but which does not actually emit such associated
statements. In other words, the linker effectively does not generate
scoping information for NgModules at all (in some configurations) and this
option more directly expresses that behavior.
This is a refactoring as no generated code is changed as a result of
introducing this flag, due to the linker's behavior of not emitting
associated statements.
PR Close#45024
Node.js v12 will become EOL on 2022-04-30. As a result, Angular CLI v14 will no longer support Node.js v12.
BREAKING CHANGE:
Support for Node.js v12 has been removed as it will become EOL on 2022-04-30. Please use Node.js v14.15 or later.
PR Close#45286
When parsing interpolations, the input string is _decoded_ from what was
in the orginal template. This means that we cannot soley rely on the input
string to compute source spans because it does not necessarily reflect
the exact content of the original template. Specifically, when there is
an HTML entity (i.e. ` `), this will show up in its decoded form
when processing the interpolation (' '). We need to compute offsets
using the original _encoded_ string.
Note that this problem only surfaces in the splitting of interpolations.
The spans to this point have already been tracked accurately. For
example, given the template ` <div></div>`, the source span for the
`div` is already correctly determined to be 6. Only when we encounter
interpolations with many parts do we run into situations where we need
to compute new spans for the individual parts of the interpolation.
PR Close#44811
Jasmine logs a warning when there's a `describe` with no tests. These changes fix one such case in the compiler that happens when the tests are run against Windows.
PR Close#45285
The `@angular/localize` package depends on a version of Babel that is two years
old, so this commit updates to the latest version.
Some changes were made to the linker and compliance tests to account for slight
changes in source maps, along with a few code updates because of changes to
the typings of Babel.
PR Close#44931
Proactively replaces our usages of the deprecated `ts.create*` methods in favor of using `ts.factory.create*` so that we're not surprised when the TS removes them in the future. Also accounts for some cases where the signature had changed.
PR Close#45134
Before this, the compiler resolves the value in the DTS as dynamic.
If the `trigger` is imported from `@angular/animations`, this PR will
use FFR to simulate the actual implementation in JS and extracts the
animation name.
PR Close#45107
In templates with several levels of nested nodes, it's common for several `elementStart`/`elementEnd` instructions to show up in a row which can be optimized away.
These changes add chaining support for `elementStart`, `elementEnd`, `elementContainerStart` and `elementContainerEnd` to shave off some bytes when possible.
PR Close#44994
This commit updates various places in the repo (mostly tests/examples) to drop all `.ngfactory` and `.ngsummary` imports as they are no longer needed in Ivy.
PR Close#44957
This commit implements the first phase of standalone components in the Angular
compiler. This mainly includes the scoping rules for standalone components
(`@Component({imports})`).
Significant functionality from the design is _not_ implemented by this PR,
including:
* imports of standalone components into NgModules.
* the provider aspect of standalone components
Future commits will address these issues, as we proceed with the design of
this feature.
PR Close#44812
In preparation for standalone components, this commit moves the logic which
determines the potential set of components/directives/pipes in a template into
a separate function. This is a simple but crucial refactoring that breaks the
assumption that all template scopes come from NgModules.
PR Close#44812
Previously each `DecoratorHandler` in the compiler was stored in a single file
in the 'annotations' package. The `ComponentDecoratorHandler` in particular was
several thousand lines long.
Prior to implementing the new standalone functionality for components, this
commit refactors 'annotations' to split these large files into their own build
targets with multiple separate files. This should make the implementation of
standalone significantly cleaner.
PR Close#44812
Refs http://b/214103351.
This happens if a user writes `<span i18n>Message</span>`. This is accepted as an internationalized message, but without a description. JSCompiler will throw an error in this situation because descriptions are generally required. Now, the Angular compiler will generate a suppression annotation so JSCompiler allows the syntax. This will ease an internal migration to JSCompiler-based i18n.
PR Close#44787
The logical filesystem would store a cached result based on the canonical path,
where the cached value contains the physical path that was originally provided.
This meant that other physical paths with an identical canonical path would use
a cached result derived from another physical path.
This inconsistency is not known to result in actual issues but is primarily
being made as a performance improvement, as using the provided physical paths
as cache key avoids the need to canonicalize the path if its result is already
cached.
PR Close#44798
The generated imports should normally use module specifiers that are valid for
use in production code, where arbitrary relative imports into e.g. node_modules
are not allowed. For template type-checking code it is however acceptable to
use relative imports, as such files are never emitted to JS code. It is
desirable to allow a filesystem relative import as fallback if an import would
otherwise fail to be generated, as doing so allows fewer situations from
needing an inline type constructor.
PR Close#44798
This commit removes the leftover `Identifiers` class that was used in the
ViewEngine compiler. The remaining usages of the `inlineInterpolate` and
`interpolate` instructions were refactored to make use of an
`InterpolationExpression` output expression to capture the argument list of an
interpolation expression. An attempt was made to refactor this further by
converting to the desired interpolation instruction immediately, but some
downstream consumers are designed in a way where the argument list itself is
needed, e.g. as other arguments need to be prepended/appended.
PR Close#44676
So-called "Quote expressions" were added in b6ec2387b3
to support foreign syntax to be used in Angular templates, requiring a custom
template transform to convert them somehow during compilation. Support for template
transforms was originally implemented in a43ed79ee7 but
has since been dropped. Since the compiler is not public API the quote expressions
should not have any usages anymore. Removing support for them can improve error
reporting for expressions that contain a `:`, e.g. binding to a URL without quotes:
```html
<a [href]="http://google.com">Click me</a>
```
Here, `http` would be parsed as foreign "http" quote expression with `//google.com` as
value, later reporting the error "Quotes are not supported for evaluation!" because
there was no template transform to convert that code.
Closes#40398
PR Close#44915
Attempting to run as is fails because we have `"type": "module"`. `shelljs` is a CommonJS module however, so we need to do a default import and destructure.
```
$ node packages/compiler-cli/test/compliance/update_all_goldens.js
const {exec} = require('shelljs');
^
ReferenceError: require is not defined in ES module scope, you can use import instead
This file is being treated as an ES module because it has a '.js' file extension and '/home/douglasparker/Source/ng/packages/compiler-cli/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
at file:///home/douglasparker/Source/ng/packages/compiler-cli/test/compliance/update_all_goldens.js:11:16
at ModuleJob.run (node:internal/modules/esm/module_job:183:25)
at async Loader.import (node:internal/modules/esm/loader:178:24)
at async Object.loadESM (node:internal/process/esm_loader:68:5)
at async handleMainPromise (node:internal/modules/run_main:63:12)
```
PR Close#44916
TypeScript configures `strictNullChecks` to be disabled by default, so the nullish
coalescing check should follow the same default. The rule actively depends on
`strictNullChecks`, as TypeScript doesn't include `null`/`undefined` in its types
otherwise so the check wouldn't have a way to differentiate between them.
This commit also takes the `strict` flag into account when `strictNullChecks` itself
is not configured.
PR Close#44862
The initial commit e9124b42d5 stored the errors rather than
throwing but did not store them in a place that was accessible to consumers. Instead,
the errors should be added to the IndexedComponent so they can be surfaced where the
index results are consumed
PR Close#44884
When the indexer encounters a location where the source span doesn't
match up with the expected identifier, the current visitor code throws
an error. Instead, this change creates an error and moves on to the next
template item. This allows the indexer to continue analysis even when
there are errors in the source mapping. In addition, it still allows callers
to surface those errors in their own way while still providing as much indexed
information as possible about a node.
PR Close#44825
An `ng-template` with an inline template (i.e. has a structural
directive) would previously not get an `undefined` `tagName` because the
logic assumed the element would be `t.Element` or `t.Content` and read
the tag name from the `name` property. For a `t.Template`, this exists
instead on the `t.tagName`. The final result would be an `tagName` of `undefined`
for the parent `t.Template`, causing failures in the indexer downstream.
This `undefined` value is actually expected in the renderer code, even
though the type does not specify this possibility. This change updates
the type of `tagName` to be `string|null` and explicitly handles the
case where there is a structural directive on an `ng-template`. You can
see how the two are differentiated in the compliance code that was
modified in this commit.
PR Close#44788
The previous fix for correcting spans with comments in
59eef29a6c
had the unfortunate side effect of _breaking_ the spans with comments
when there was leading whitespace. This happened because the previous
fix was testing one without a comment, identifying that the offset shouldn't
have anything added to it, and then removing that offset adjustment
(`offsets[i] + (expressionText.length - sourceToLex.length)`).
Upon further investigation, this offset adjustment _was actually
necessary_ for when the input had comments, but this was only because
the `stripComments` function used `trim` to remove whitespace for these
cases. This is the real problem -- not only does it create a ton of confusion
but also it means that the behavior of the lexer and resulting spans is
different between inputs with comments and inputs without comments.
After reviewing how the `inputLength` of `_ParseAST` was used, it
appears that the correct behavior would be to _not_ trim the input. The
`inputLength` is used to advance the current index beyond points which
have been processed. This _should_ include any whitespace. Additionally,
`inputLength` doesn't appear to be needed at all. When there was no
comment in the input, it was always equal to the `input.length` anyways.
When there _is_ a comment, it should include that comment anyways to
advance the index beyond the comment.
PR Close#44785
The original fix for svg elements in
92b23f4851
did not account for svg elements when they also had a structural
directive on them, making the node a template. This resulted in the
logic added in fix above not being applied.
PR Close#44785
Previously, if a bad extended diagnostic category was given, it would fail with the expected error as well as an unexpected assertion error:
```
$ ng build -c development
✔ Browser application bundle generation complete.
./src/main.ts - Error: Module build failed (from ./node_modules/@ngtools/webpack/src/ivy/index.js):
Error: Unexpected call to 'assertNever()' with value:
test
at /home/douglasparker/Source/ng-new/node_modules/@ngtools/webpack/src/ivy/loader.js:77:18
at processTicksAndRejections (internal/process/task_queues.js:95:5)
./src/polyfills.ts - Error: Module build failed (from ./node_modules/@ngtools/webpack/src/ivy/index.js):
Error: Unexpected call to 'assertNever()' with value:
test
at /home/douglasparker/Source/ng-new/node_modules/@ngtools/webpack/src/ivy/loader.js:77:18
at processTicksAndRejections (internal/process/task_queues.js:95:5)
Error: error NG4004: Angular compiler option "extendedDiagnostics.checks['invalidBananaInBox']" has an unknown diagnostic category: "test".
Allowed diagnostic categories are:
warning
error
suppress
```
The assertion comes from `ExtendedTemplateCheckerImpl`, which expects a well-formed configuration, yet the compiler would construct it even when errors were found. This commit skips constructing and running extended diagnostics if the configuration had errors, which should avoid triggering these assertion errors.
I'm unfortunately not able to actually test this change. The test passes even before the fix because the `ngc` binary and end-to-end tests [don't request diagnostics unless the configuration is considered valid](ed21f5c753/packages/compiler-cli/src/perform_compile.ts (L292-L293)). See [Slack](https://angular-team.slack.com/archives/C4WHZQMRA/p1642641305003800) for more details.
PR Close#44778
Refs #42966.
There were two remaining places where `_extendedTemplateDiagnostics` needed to be set which should have been removed in #44712 but got missed. This updates them to only require `strictTemplates` and not `_extendedTemplateDiagnostics` so the feature is properly enabled in production.
PR Close#44777
Refs #42966.
Extended diagnostics provide additional analysis about Angular templates by emitting warnings for specific patterns known to be error prone or cause developer confusion. Currently, there are two such diagnostics which are enabled by default:
* `invalidBananaInBox` emits a warning if a user writes a two-way binding backwards like `([foo])="bar"`, when they actually wanted `[(foo)]="bar"`.
* `nullishCoalescingNotNullable` emits a warning if a binding attempts to perform nullish coalescing (`??`) on a type which does not include `null` or `undefined`, such as `{{ foo ?? 'bar' }}` where `foo` is defined as `string` instead of `string | null`.
These diagnostics are enabled as warnings by default, but this can be configured in the `tsconfig.json` like so:
```jsonc
{
"angularCompilerOptions": {
"extendedDiagnostics": {
// The categories to use for specific diagnostics.
"checks": {
// Maps check name to its category.
"invalidBananaInBox": "suppress"
},
// The category to use for any diagnostics not listed in `checks` above.
"defaultCategory": "error"
}
}
}
```
Allowed categories for a diagnostic are `warning` (default), `error`, or `suppress`. `warning` emits the diagnostic but allows the compilation to succeed, `error` *will* fail the compilation, while `suppress` will ignore the diagnostic altogether.
The initial release has two diagnostics, and we are hoping to expand this longer term to add more diagnostics and provide additional insight into Angular templates to detect and surface developer mistakes *before* hours of debugging are wasted.
PR Close#44712
This commit reduces the analysis work that needs to happen during an
incremental rebuild by properly recording files for which no traits were found
in the set of files that have no traits, such that the same file doesn't have
to be reanalyzed during subsequent rebuilds. It also excludes shim files from
analysis.
PR Close#44731
Bundlers like Rollup may use an element access expression for an export
declaration, which causes ngcc to ignore those export declarations possibly
resulting in incomplete processing of packages.
Element access syntax may be used when the declared name is not considered
as valid JS identifier, but bundlers may be conservative in determining whether
an identifier can be used (to emit a property access) and opt for a string
literal in an element access instead.
The element access syntax introduces a problem for ngcc, where it wouldn't
consider such export as class declaration, causing them to be skipped. The
ngtsc compiler is implemented with the assumption that all class declarations
use a `ts.Identifier` as name, whereas the element access is using a string
literal for the declared name. This makes it troublesome for ngcc to support
this syntax form in UMD bundles.
To work around the problem, this function transforms these access expressions
into regular property accesses. The source text is parsed to an AST to allow
finding the element accesses in a robust way, after which the affected text
ranges are replaced with property accesses in the original source text.
Closes#44037
PR Close#44669
In the `Element` node of a parsed `<svg>` element, the `name` is recorded
as `:svg:svg`. When the Angular Indexer ran over this element, it would
attempt to find this name in the template text and fail, as the namespace
portion of the name was added automatically at parse time and is of course
missing from the original template.
This commit changes the indexer to detect these namespaced elements and only
search for the tag name.
PR Close#44678
When parsing a binding with a comment at the end of the expression, the
parser previously had logic to offset the parsed spans by the length of the
comment. This logic seemed not to serve any useful purpose, and instead
resulted in the corruption of the spans. For example, in the expression
`{{foo // comment}}`, the parser would map the parsed `foo` `PropertyRead`
node at the location of the characters 'ent' from the comment suffix.
This commit removes that logic, correcting the parsed spans of such nodes in
the presence of comments. Removing this logic does not seem to have caused
any tests to fail.
PR Close#44678
Previously, the Angular Indexer made an assumption that in any binding to
a property of an `ImplicitReceiver`, the property name begins at the start
of the binding. This is true for normal reads from `ImplicitReceiver` as
the implicit receiver has no representation in the template.
However, `ThisReceiver` inherits from `ImplicitReceiver` and _does_ have a
template representation. Such a binding looks like `{{this.foo}}`. This
commit corrects the logic of the indexer to use the `nameSpan` of the
property binding instead of its `sourceSpan` to locate the identifier.
PR Close#44678
Refs #42966.
This validates the `tsconfig.json` options for extended template diagnostics. It verifies:
* `strictTemplates` must be enabled if `extendedDiagnostics` have any explicit configuration.
* `extendedDiagnostics.defaultCategory` must be a valid `DiagnosticCategoryLabel`.
* `extendedDiagnostics.checks` keys must all be real diagnostics.
* `extendedDiagnostics.checks` values must all be valid `DiagnosticCategoryLabel`s.
These include new error codes, each of which prints out the exact property that was the issue and what the available options are to fix them.
It does disallow the config:
```json
{
"angularCompilerOptions": {
"strictTemplates": false,
"extendedDiagnostics": {
"defaultCategory": "suppress"
}
}
}
```
Such a configuration is technically valid and could be executed, but will be rejected by this verification logic. There isn't much reason to ever do this, since users could just drop `extendedDiagnostics` altogether and get the intended effect. This is unlikely to be a significant issue for users, so it is considered invalid for now to keep the implementation simple.
PR Close#44391
Refs #42966.
The `defaultCategory` option is used for any extended template diagnostics which do not have any specific category specified for them. It defaults to `warning`, since that is the most common behavior expected for users. This provides an easy way for users to promote all diagnostics to errors or suppress all diagnostics.
PR Close#44391
Refs #42966.
This updates `TemplateContext` to include a new `makeTemplateDiagnostic()` function which automatically uses the correct diagnostic category for that check. This makes sure that each diagnostic is emitted with the correct category. It also implicitly passes some known values like `component` and `code` to make the extended template diagnostics a little simpler. Diagnostics which are suppressed are never instantiated at all, which acts as a slight performance optimization since any emitted diagnostics would be ignored anyways.
Unfortunately, diagnostics still have access to `ctx.templateTypeChecker.makeTemplateDiagnostic()` to manually create diagnostics with a different category. Both banana in box and nullish coalescing checks include tests to make sure they respect a manually configured category. This convention should hopefully give a reasonable certainty that new diagnostics will use the correct reporting function, even if that is not strictly enforced.
PR Close#44391
Refs #42966.
This includes a mapping of extended template diagnostics to their associated diagnostic category. It is generated from the list of diagnostic names, so the list should always be implicitly kept up to date. Usage looks like:
```json
{
"angularCompilerOptions": {
"extendedDiagnostics": {
"checks": {
"invalidBananaInBox": "error",
"nullishCoalescingNotNullable": "suppress"
}
}
}
}
```
PR Close#44391
Refs #42966.
This is a static array of all the 1P extended template diagnostic factories built into the Angular compiler directly. It provides an encapsulated list of all diagnostics rather than requiring users to manually list each one individually.
PR Close#44391
Refs #42966.
This moves extended template check factory invocations into the checker itself, where it can provide a more consistent API contract. Factories are called with compiler options and may return a `TemplateCheck` or `undefined` if the current options do not support that check. This allows `nullishCoalescingNotNullable` to disable itself when `strictNullChecks` is disabled without throwing errors. This gives extended template diagnostics a stronger abstraction model to define their behavior with.
PR Close#44391
Refs #42966.
The enum of extended template diagnostic names allows a global registry of first-party diagnostics with a developer-friendly string name which can be used for configuration. This name is used in the new `TemplateCheckFactory` to bind the name to a particular `ErrorCode` and make both available *before* constructing the actual template check, which is necessary to configure it appropriately.
PR Close#44391
In `language-service`, the `checker.getDirectiveMetadata` doesn't return the animations meta of the `Component`.
but it's useful for animation completion.
PR Close#44630
The changes in 2028c3933f caused method
calls to be emitted using additional parenthesis into the TCB, which in
turn prevented proper type narrowing when the method acts as a type
guard. This commit special-cases method calls from property reads to
avoid the additional parenthesis.
Fixes#44353
PR Close#44447
This was flagged during the code review of #44580. When generating a type check block, we were interpreting any call to `$any` as an `as any` cast, even if it's part of a `PropertyRead` (e.g. `foo.$any(1)`). This is handled correctly in other parts of the compiler, but it looks like it was missed in the type checker.
PR Close#44657
This page exists in the most recent angular.io version (v13 currently), so there's no need to link to an old version. The hash also refers to the title section of the page, which isn't necessary and is now dropped.
PR Close#44649
Dev mode output was switched from ES5 -> ES2015 recently and as a part of those changes, some target names that contained `_es5` postfixes were changes to `_es2015` instead. This commit fixes the issue with one of the recently merged BUILD files that contained the old (`_es5`) postfix.
PR Close#44651
When building a library, the `rootDir` option is configured to ensure
that all source files are present within the entry-point that is being
build. This imposes an extra constraint on the reference emit logic,
which does not allow emitting a reference into a source file outside of
this `rootDir`.
During the generation of type-check blocks we used to make a best-effort
estimation of whether a type reference can be emitted into the
type-check file. This check was relaxed in #42492 to support emitting
more syntax forms and type references, but this change did not consider
the `rootDir` constraint that is present in library builds. As such, the
compiler might conclude that a type reference is eligible for emit into
the type-check file, whereas in practice this would cause a failure.
This commit changes the best-effort estimation into a "preflight"
reference emit that is fully accurate as to whether emitting a type
reference is possible.
Fixes#43624
PR Close#44587
The `NgtscCompilerHost` is implemented using the `FileSystem`
abstraction of the compiler, which is implemented for tests using an
in-memory `MockFileSystem`. If the in-memory filesystem contains
symlinks, then using `NgtscCompilerHost` would not reflect their
resolved real path. Instead, the TypeScript compiler would use its
default implementation based on the real filesystem, which is unaware of
the in-memory `MockFileSystem` setup.
This change does not currently address any issues, but is being fixed
as it prevented a reproduction scenario from behaving correctly.
PR Close#44587
In certain scenarios, the compiler may have crashed with an
`Unable to write a reference` error which would be particularly hard
to diagnose. One of the primary reasons for this failure is when the
`rootDir` option is configured---typically the case for libraries---
and a source file is imported using a relative import from an external
entry-point. This would normally report TS6059 for the invalid relative
import, but the crash prevents this error from being surfaced.
This commit refactors the reference emit logic to result in an explicit
`Failure` state with a reason as to why the failure occurred. This state
is then used to report a `FatalDiagnosticException`, preventing a hard
crash.
Closes#44414
PR Close#44587
This commit moves some logic to make the location of runtime error codes consistent across packages. Now all error codes are located in `packages/core/src/errors.ts` file.
PR Close#44398
To make our test output i.e. devmode output more aligned
with what we produce in the NPM packages, or to be more
aligned with what Angular applications will usually consume,
the devmode output is switched from ES5 to ES2015.
Additionally various tsconfigs (outside of Bazel) have been
updated to match with the other parts of the build. The rules
are:
ES2015 for test configurations, ES2020 for actual code that will
end up being shipped (this includes the IDE-only tsconfigs).
PR Close#44505
The Ivy compiler no longer generates code for type-checking purposes
using the output AST types. Instead, it uses TypeScript AST nodes and
its printer for type-checking. This commit removes the type-related
output nodes.
PR Close#44411
The `ng_rollup_bundle` rule has been replaced with a new rule called
`app_bundle`. This rule replicates the Angular v13 optimization
pipeline in the CLI, so that we can get better benchmarking results.
Also the rule is much simpler to maintain as it relies on ESbuild.
The old `ng_rollup_bundle` rule did rely on e.g. build-optimizer that no
longer has an effect on v13 Angular packages, so technically size
tests/symbol tests were no longer as correct as they were before. This
commit fixes that.
A couple of different changes and their explanation:
* Language-service will no longer use the benchmark rule for creating
its NPM bundles! It will use plain `rollup_bundle`. ESBuild would have
been nice but the language-service relies on AMD that ESBuild cannot
generate (yet?)
* Service-worker ngsw-worker.js file was generated using the benchmark
bundle rule. This is wrong. We will use a simple ESbuild rule in the
future. The output is more predictable that way, and we can have a
clear use of the benchmark bundle rule..
* A couple of benchmarks in `modules/` had to be updated to use e.g.
`initTableUtils` calls. This is done because with the new rule, all
files except for the entry-point are considered side-effect free. The
utilities for benchmarks relied on side-effects in some
transitively-loaded file (bad practice anyway IMO). We are now
initializing the utilities using a proper init function that is
exported...
PR Close#44490
Cleans up some of the temporary workarounds that were necessary in order to land support for TypeScript 4.5 since they're no longer necessary.
PR Close#44477
Now that ViewEngine libraries can no longer be created, the latest
TypeScript version that ngcc should be able to process is TypeScript 4.3,
i.e. the version of TypeScript that was supported in Angular 12.
However, ngcc's integration tests used the TypeScript version of the
workspace to create the JavaScript files from TypeScript sources on
demand. This introduces friction when upgrading the TypeScript version
within the workspace, as changes to TypeScript's emit format may affect
ngcc's ability to process it correctly.
The on demand creation of JavaScript files was convenient for authoring
tests, but it also helped to detect incompatibilities with newer
versions of TypeScript. Now that ngcc no longer has to process newer
versions of TypeScript, we want to pin the integration suite to use
JavaScript code as if it were compiled using TypeScript 4.3, i.e. a
version of TypeScript that is actually supported by ngcc.
This commit updates the integration test to inline all the generated
files directly in the tests, instead of compiling them on demand. This
was done by temporarily installing TypeScript 4.3 and using it to create
the `loadTestFiles` statement from the original TypeScript inputs.
An alternative could have been to install TypeScript 4.3 as an actual
dependency in the workspace and using that to continue compiling the
integration suite on demand, but this brings some overhead in package
installations (TypeScript is ~60MB) and the authoring aspect of ngcc
integration test is expected to diminish, now that ngcc's support is no
longer a moving target.
PR Close#44448
As mentioned in the previous commit, integration tests will be declared
in subpackages of `//integration`. For these tests to still rely on the
NPM packages from `HEAD`, we need to update the visibility.
PR Close#44238
Previously, when processing UMD, ngcc assumed that the `exports`
argument of the CommonJS factory call (if present) would be the first
argument of the call. This is generally true for the supported UMD
formats, but can change if ngcc prepends more imports (and thus factory
arguments) while processing the module. This could lead to errors when
trying to collect dependencies of an already processed module.
(This was accidentally broken in #44245 (commit 2bc3522e16).)
This commit fixes it by not making any assumptions about the position of
an `exports` argument in the CommonJS factory call.
Fixes#44380
PR Close#44381
This commit finishes the removal of View Engine from the codebase, deleting
those pieces of @angular/compiler which were only used for VE.
Co-Authored-By: JoostK <joost.koehoorn@gmail.com>
PR Close#44368
This commit does a first-pass removal of the View Engine infrastructure
in compiler-cli. A more in-depth cleanup is necessary and large parts
of the View Engine compiler infrastructure remain within
`@angular/compiler`, this is just a first cleanup step.
PR Close#44269
As a preparation for the removal of the ViewEngine parts in
`compiler-cli`, this commit moves the version number helper functions
up one level such that the whole `diagnostics` subfolder can be removed.
PR Close#44269
Adds support for TypeScript 4.5. Includes the following changes:
* Bumping the package versions.
* Fixing a few calls to `createExportSpecifier` and `createImportSpecifier` that require an extra parameter.
* Adding some missing methods to the TS compiler hosts.
* Fixing an issue in the TS mocks for the ngcc tests where a regex was too agressive and was trying to match a path like `/node_modules/@typescript/lib-es5`.
* Accounting for type-only import specifiers when reporting DI errors (see #43620).
Fixes#43620.
PR Close#44164
The downlevel decorator transform (commonly used in the CLI and other
tooling of the ecosystem for enabling JIT ES2015+), is currently
incorrectly dealing with nested classes.
The transform will accidentally visit nested classes (in a constructor)
multiple times and generate duplicated instances of the `ctorParameters`
fields. This does not sound like an issue at first, but the duplicated
`ctorParameters` fields will miss significant type information that has
been elided by the first visit, resulting in generated code like the
following:
```js
let MyClass = /* @__PURE__ */ __name(class MyClass extends UpgradeNg1ComponentAdapter {
constructor(scope, injector3, elementRef) {
}
}, "MyClass");
MyClass.ctorParameters = () => [
{ type: void 0, decorators: [{ type: Inject, args: [$SCOPE] }] },
{ type: Injector },
{ type: ElementRef }
];
MyClass.ctorParameters = () => [
{ type: void 0 }, // <---- NOTE!
{ type: Injector },
{ type: ElementRef }
];
```
PR Close#44281
Previously, the mock packages created for `UmdDependencyHost`'s tests,
specified the entry-point as `esm2015`. This does not matter in tests,
since the packages are explicitly passed to the `UmdDependencyHost`
(while in reality the appropriate host would be determined based on the
name of the entry-point property - in this case, detecting the
entry-point as ES2015 and not UMD).
However, in order to avoid confusion, this commit updates the test
packages to use `main` (the default property used for the UMD format in
`package.json` files).
PR Close#44245
Previously, the ngcc `UmdReflectionHost` would throw a misleading error
when trying to collect dependencies of an invalidly formatted UMD
module. This happened because an error would be thrown while trying to
construct the error message for the actual error, by calling `getText()`
on certain TypeScript AST nodes. See
https://github.com/angular/angular/issues/44019#issuecomment-959954121
for a more in-depth explanation.
This commit ensures `getText()` can be safely called on TypeScript AST
nodes when collecting dependencies of UMD modules.
PR Close#44245
This commit utilizes the infrastructure added in the previous commit to
run more tests against more of the supported UMD formats. This shall
give us more confidence that all aspects of UMD processing work
correctly with the various formats.
PR Close#44245
Previously, several ngcc test suites used their own helper to generate
test UMD modules.
This commit switches to using the same helper for generating UMD modules
across test suites. This improves DRYness (ensuring changes/fixes to the
UMD format need only be applied once) and makes it easier to test
different UMD formats in all test suites.
PR Close#44245
Previously, ngcc could only handle UMD modules whose wrapper function
was implemented as a `ts.ConditionalExpression` (i.e. using a ternary
operator). This is the format emitted by popular bundlers, such as
Rollup.
This commit adds support for a different format, that uses `if/else`
statements, which is what is [emitted by Webpack][1].
[1]: https://webpack.js.org/configuration/output/#type-umdFixes#44019
PR Close#44245
Previously, ngcc could only handle UMD modules whose wrapper function
was implemented as a `ts.ConditionalExpression` (i.e. using a ternary
operator). This is the format emitted by popular bundlers, such as
Rollup. However, this failed to account for a different format, using
`if/else` statements, such as the one [emitted by Webpack][1].
This commit prepares ngcc for supporting different UMD wrapper function
formats by decoupling the operation of parsing the wrapper function body
to capture the various factory function calls and that of operating on
the factory function calls (for example, to read or update their
arguments). In a subsequent commit, this will be used to add support for
the Webpack format.
[1]: https://webpack.js.org/configuration/output/#type-umd
PR Close#44245
This commit removes special functions that were used to run tests in ViewEngine or Ivy only.
Since ViewEngine is deprecated and we no longer run ViewEngine tests on CI, we can cleanup
those special helpers and ViewEngine-only tests.
PR Close#44120
ngcc used to rewrite `PRE_R3` markers to become `POST_R3` in order to
switch the runtime implementation in `@angular/core` from View Engine to
Ivy. Now that `@angular/core` is published as native Ivy package and the
runtime switch code has been removed, there is no need for ngcc to
perform this transform anymore.
PR Close#43891
Now that the core package has been cleaned up to no longer contain Ivy
switch code, the transform to switch the `PRE_R3` markers to become
`POST_R3` is deleted as well.
PR Close#43891
This commit removes the View Engine runtime. Itself, this change is
relatively straightforward, but it represents the final step in a multi-year
journey. It's only possible due to the hard work of many current and former
team members and collaborators, who are too numerous to list here.
Co-authored-by: Alan Agius <alan.agius4@gmail.com>
Co-authored-by: Andrew Kushnir <akushnir@google.com>
Co-authored-by: Andrew Scott <atscott01@gmail.com>
Co-authored-by: Andrew Seguin <andrewjs@google.com>
Co-authored-by: Cédric Exbrayat <cedric@ninja-squad.com>
Co-authored-by: Charles Lyding <19598772+clydin@users.noreply.github.com>
Co-authored-by: Dave Shevitz <dshevitz@google.com>
Co-authored-by: Doug Parker <dgp1130@users.noreply.github.com>
Co-authored-by: Dylan Hunn <dylhunn@gmail.com>
Co-authored-by: Emma Twersky <emmatwersky@google.com>
Co-authored-by: George Kalpakas <kalpakas.g@gmail.com>
Co-authored-by: Igor Minar <iminar@google.com>
Co-authored-by: Jeremy Elbourn <jelbourn@google.com>
Co-authored-by: Jessica Janiuk <jessicajaniuk@google.com>
Co-authored-by: JiaLiPassion <JiaLi.Passion@gmail.com>
Co-authored-by: Joey Perrott <josephperrott@gmail.com>
Co-authored-by: Joost Koehoorn <joost.koehoorn@gmail.com>
Co-authored-by: Kristiyan Kostadinov <crisbeto@abv.bg>
Co-authored-by: Madleina Scheidegger <mscheid@google.com>
Co-authored-by: Mark Thompson <2554588+MarkTechson@users.noreply.github.com>
Co-authored-by: Minko Gechev <mgechev@gmail.com>
Co-authored-by: Paul Gschwendtner <paulgschwendtner@gmail.com>
Co-authored-by: Pawel Kozlowski <pkozlowski.opensource@gmail.com>
Co-authored-by: Pete Bacon Darwin <pete@bacondarwin.com>
Co-authored-by: Wagner Maciel <wagnermaciel@google.com>
Co-authored-by: Zach Arend <zachzach@google.com>
PR Close#43884
This commit removes most tests that were designated as only covering View
Engine code. It also removes tag filters from CI and local commands to run
tests.
In a few cases (such as with the packages/compiler tests), this tag was
improperly applied, and certain test cases have been added back running in
Ivy mode.
This commit also empties `@angular/compiler/testing` as it is no longer
necessary (this is safe since compiler packages are not public API). It can
be deleted in the future.
PR Close#43884
When executing, ngcc writes a lock-file that is used to coordinate multiple concurrent instances of ngcc.
Previously, this file was written at `node_modules/@angular/compiler-cli/ngcc`, or similar depending upon the bundling of the package.
But this causes problems for setups where `node_modules` package directories are expected to be read-only.
Now, the lock-file is written as `.ngcc_lock_file` into the top of the `node_modules`, which is an acceptable place to store transient files.
This change should help to unblock use of tools like pnpm and lerna, which can use symlinks to readonly package directories.
PR Close#44228
These changes add support for interpreting `String.prototype.concat` calls. We need to support it, because in TypeScript 4.5 string template expressions are transpiled to `concat` calls, rather than string concatenations. See https://github.com/microsoft/TypeScript/pull/45304.
PR Close#44167
When a partially compiled component or directive is "linked" in JIT mode, the body
of its declaration is evaluated by the JavaScript runtime. If a class is referenced
in a query (e.g. `ViewQuery` or `ContentQuery`) but its definition is later in the
file, then the reference must be wrapped in a `forwardRef()` call.
Previously, query predicates were not wrapped correctly in partial declarations
causing the code to crash at runtime. In AOT mode, this code is never evaluated
but instead transformed as part of the build, so this bug did not become apparent
until Angular Material started running JIT mode tests on its distributable output.
This change fixes this problem by noting when queries are wrapped in `forwardRef()`
calls and ensuring that this gets passed through to partial compilation declarations
and then suitably stripped during linking.
See https://github.com/angular/components/pull/23882 and https://github.com/angular/components/issues/23907
PR Close#44113
Currently the TS version checking function interprets a version like `1.2.3-rc.5` as `1.2.NaN` which would allow it to bypass the version checking altogether.
These changes add a little bit more logic to ensure that such versions are handled correctly. There's also an error if we don't manage to parse the version string.
Also it seemed like we never actually ran the version check unit tests, because they didn't have a test target.
PR Close#44109
This commit adds additional information to encourage developers to contact
the author of View Engine libraries and ask them to update to partial Ivy.
Fixes#42308
PR Close#43996
Consider the `NgModel` directive which has the `ngModelOptions` input:
```ts
class NgModel {
@Input() ngModelOptions: { updateOn: 'blur'|'change'|'submit' };
}
```
In a template this may be set using an object literal as follows:
```html
<input ngModel [ngModelOptions]="{updateOn: 'blur'}">
```
This assignment should be accepted, as the object's type aligns with the
`ngModelOptions` input in `NgModel`. However, if the `strictNullInputTypes`
option is disabled this assignment would inadvertently produce an error:
```
Type '{ updateOn: string; }' is not assignable to type '{ updateOn: "blur"|"change"|"submit"; }'.
Types of property 'updateOn' are incompatible.
Type 'string' is not assignable to type '"blur"|"change"|"submit"'
```
This is due to the `'blur'` value being inferred to be of type `string`
instead of retaining its literal type. The non-null assertion operator
that is automatically inserted for input binding assignments when
`strictNullInputTypes` is disabled inhibits TypeScript from inferring
the string value as its literal type.
This commit fixes the issue by omitting the insertion of the non-null
operator for object literals and array literals.
PR Close#38305
When a safe method call such as `person?.getName()` is used, the
compiler would generate invalid code if the argument list also contained
a safe method call. For example, the following code:
```
person?.getName(config?.get('title').enabled)
```
would generate
```
let tmp;
ctx.person == null ? null : ctx.person.getName((tmp = tmp) == null ?
null : tmp.enabled)
```
Notice how the call to `config.get('title')` has completely disappeared,
with `(tmp = tmp)` having taken its place.
The issue occurred due to how the argument list would be converted
from expression AST to output AST twice. First, the outer safe method
call would first convert its arguments list. This resulted in a
temporary being allocated for `config.get('title')`, which was stored in
the internal `_resultMap`. Only after the argument list has been
converted would the outer safe method call realize that it should be
guarded by a safe access of `person`, entering the `convertSafeAccess`
procedure to convert itself. This would convert the argument list once
again, but this time the `_resultMap` would already contain the
temporary `tmp` for `config?.get('title')`. Consequently, the safe
method in the argument list would be emitted as `tmp`.
This commit fixes the issue by ensuring that nodes are only converted
once.
Closes#44069
PR Close#44088
Enables code spitting for ESBuild bundling of the compiler-cli. When
we initially configured ESBuild as part of APF v13, we left this option
disabled as code splitting is marked experimental. The ESM splitting
mechanism in ESBuild seems very solid so far (judging subjectively
and by experience/reports in the ESBuild repo), so we should give
it a shot, in order to significantly reduce the size of the NPM package,
and simplify debugging (by not having duplicated code portions for all
the different entry points).
To clarify: Code splitting is helpful as we have multiple entry-points
that currently duplicate code. With code splitting these entry-points
would share common code instead.
PR Close#43932
Prior refactorings caused unexpected g3 sync issues due to a patch that
changes the error documentation URL. This commit moves the base url into
a separate file to make this more apparent.
PR Close#43527
The `ErrorCode` enum in the `error_code.ts` file is governed by public
api guards but the other top-level exports from that file are exempt
from public api documentation and are therefore marked as `@internal`.
However, TypeScript is configured with the `stripInternal` compiler
option such that declarations with `@internal` markers are not emitted
into the `.d.ts` files, but this means that the reexports in the barrel
file end up referring to missing declarations.
The `stripInternal` option is considered internal and its documentation
states to use at your own risk (as per https://github.com/microsoft/TypeScript/issues/45307).
Having the option enabled is desirable for us as it works well for
hiding class fields that are marked `@internal`, which is an effective
way to hide members from the .d.ts file. As a workaround for the issue
with top-level symbols, the declarations with `@internal` markers are
moved to dedicated files for which no public api guard is setup,
therefore allowing their `@internal` markers to be dropped.
Fixes#43097
PR Close#43527
In #43879, `UmdReflectionHost` was updated to deal with the new UMD
format used by Rollup, where the parenthesis is around the wrapper
function and not the wrapper function call.
For reference, this caused failures in the `ngcc-validation` repo
([example 1][1], [example 2][2]).
This commit updates `UmdRenderingFormatter` to also handle both UMD
formats. In order to validate the change, this commit also updates the
`UmdRenderingFormatter` tests to run against both UMD formats.
[1]: https://circleci.com/gh/angular/ngcc-validation/65916
[2]: https://circleci.com/gh/angular/ngcc-validation/65758
PR Close#43931
This commit re-enables the `perform_watch` test target and updates the
test to run with the Ivy compiler.
Additionally, this target was switched over to use Angular v12 packages
as input to the test, to allow the ViewEngine tests to continue working
with v13 packages which are Ivy-only. This commit reverts those changes
now that View Engine tests are disabled, as it's desirable to test
against local artifacts that are build within the monorepo instead of
depending on NPM packages.
PR Close#43893
The View Engine compiler now throws when constructed and will be removed shortly. Direct users should switch to `NgtscProgram` to build with [Ivy](https://angular.io/guide/ivy). The View Engine compiler is being removed, so this makes it throw an error to ensure no one accidentally depends on code being removed.
PR Close#43862
Using the tag "view-engine-only" better describes the expected usage of bazel targets with the test. They can
only be run with view engine.
PR Close#43862
Since building with ViewEngine is not longer desired on CI, removing the ivy vs non-ivy testing yarn scripts
is done, informing developers to instead use `yarn test` as all tests should be run using the Ivy complier.
PR Close#43862
Recently rollup, used by ng-packagr, changed the position of parentheses
around its generated UMD wrapper functions.
This commit ensures that ngcc can handle both.
Fixes#43870
PR Close#43879
This reverts commit bba0a87055.
The reason for rollback: this change is breaking some targets in Google's codebase when there is no attribute value is displayed (attr.aria-label) when translated.
PR Close#43882
While fully dynamic bound properties (and attributes) cannot be marked for localization, properties that only contain interpolation can.
This commit ensure that attribute bindings that only contain interpolation can also be marked for localization.
Closes#43260
PR Close#43815
When extracting i18n messages from templates, ICU messages are split out from the
message that contains them. This can make it difficult in the translation files to match up
the two messages, especially if the ICU is reused in multiple placeholders.
This commit builds on top of the previous one to expose the message ID of ICU messages
from the ICU placeholders as additional metadata in the `$localize` tagged strings.
Now the metablock following any placeholder can also contain the associated ID
delimited from the placeholder name by `@@`.
Fixes#17506
PR Close#43534
Refs #42966.
Previously, a build when emitted one warning and no errors would fail with a non-zero exit code. This is not what users would expect, but had not been an issue before since the compiler did not actually emit any warnings. With upcoming extended template diagnostics and other warnings, this is now a case that needs to be supported. Warnings are printed to `stderr` as before, but `ngc` now exits with code `0` and the build is considered successful.
Implemented this by adding a new `expectedExitCode` parameter to `driveDiagnostics()` which asserts against the real exit code. Most importantly, it does not **require** the the build to pass since any exit code can be given, so it is up to the test to assert this as well as many messages printed to make sure they are acceptable. This is useful for testing warnings and ensuring the build still passes.
PR Close#43673
This commit updates the `node` engines range for all Angular
framework packages to:
* No longer support NodeJS v12 `< 12.20`. This is done because APF v13
uses package export patterns which are only supported as of v12.20.
https://nodejs.org/api/packages.html#packages_subpath_patterns.
* Allows for the latest v16 NodeJS versions. This matches with the CLI
which added NodeJS v16 support with https://github.com/angular/angular-cli/pull/21854.
We already limit this to `>= v16.10.0` in preparation to only
supporting the LTS minors of Node v16.
BREAKING CHANGE: NodeJS versions older than `v12.20.0` are no longer
supported due to the Angular packages using the NodeJS package exports
feature with subpath patterns.
PR Close#43740
Bumps the minimum required TypeScript version to 4.4.2 and removes the integration tests for 4.1, 4.2 and 4.3.
BREAKING CHANGE:
TypeScript versions older than 4.4.2 are no longer supported.
PR Close#43642
Refs #42966.
Previously, checking a template with the syntax:
```html
<div>{{ foo() ?? 'test' }}</div>
```
Where `foo()` returns a nullable value:
```typescript
@Component(/* ... */)
class TestCmp {
foo: (): string | null => null;
}
```
Would always log a nullish coalescing not nullable warning. This is because [`getSymbolOfNode(node.left)`](fe69193509/packages/compiler-cli/src/ngtsc/typecheck/extended/checks/nullish_coalescing_not_nullable/index.ts (L30)) would return the [symbol of the function (`foo`)](fe69193509/packages/compiler-cli/src/ngtsc/typecheck/src/template_symbol_builder.ts (L536-L538)) rather than the symbol of its returned value (`foo()`). Fixed this by getting the symbol for the whole expression's span, rather than just the function receiver.
Also made some minor refactorings to `template_symbol_builder` to make a similar change to safe method calls. This behavior was originally for the language service in order to handle quick info, as the user highlighting a function name would actually apply to the entire expression. This is no longer true as the language service will correctly request the type from the function rather than the `Call` expression, so these hacks are not necessary anymore. This broke two existing test cases of exactly this behavior which were easily updated. Also added a test to the language service to confirm that it is not broken by this change.
PR Close#43572
`source-map` is only used during testing and therefore there is no need to list it as a dependency.
(cherry picked from commit ae7dc75bdce713acaa1658734791317a274982da)
PR Close#43644
When compiling your application using the AOT compiler, your templates
are type-checked according to a certain strictness level. Before Angular 9
there existed only two strictness levels of template type checking as
determined by [the `fullTemplateTypeCheck` compiler option](guide/angular-compiler-options).
In version 9 the `strictTemplates` family of compiler options has been
introduced as a more fine-grained approach to configuring how strict your
templates are being type-checked.
The `fullTemplateTypeCheck` flag is being deprecated in favor of the new
`strictTemplates` option and its related compiler options. Projects that
currently have `fullTemplateTypeCheck: true` configured can migrate to
the following set of compiler options to achieve the same level of
type-checking.
```json
{
"angularCompilerOptions": {
"strictTemplates": true,
"strictInputTypes": false,
"strictNullInputTypes": false,
"strictAttributeTypes": false,
"strictOutputEventTypes": false,
"strictDomEventTypes": false,
"strictDomLocalRefTypes": false,
"strictSafeNavigationTypes": false,
"strictContextGenerics": false,
}
}
```
PR Close#43224
This commits sets the JS target for all command line tools to
NodeJS v12. ESbuild will automatically downlevel the ES2020 features
we currently use to make them compatible with NodeJS v12 <-> ES2019.
ES2020 is the prodmode output, but we still support Node v12 so
there needs to be some downleveling for now.
Note: This is a separate commit because initially the target was
set to Node v14 to match up with the prodmode Bazel output.
PR Close#43431
Similar to the other private entry-points we have added for localize,
bazel or the migrations, we should expose the tooling code through
a dedicated private export. This will make the compiler-cli exports
more consistent and it will become easier for the CLI to export
necessary code.
PR Close#43431
Currently, some tests in the `compiler-cli/integrationtest` package fail
on Windows because there are spec files which are not Bazel-generated.
When Bazel runs these tests on Windows, the spec file is resolved to
the actual source file (since there is no runfile symlinking/sandboxing).
This breaks the execution of the CJS spec file since it resides in th
`packages/compiler-cli` source folder which has a `package.json` set to
`type: module`.
We fix this by adding a `package.json` file for the integration test
folder and setting `module` to `commonjs`.
PR Close#43431
With the APF v13 package output, deep files can no longer be imported.
Since we do not intend to bundle the compiler into the compiler-cli, we
need to switch all deep imports to the primary entry-point.
PR Close#43431
Updates the dynamic-compiler test to be compatible with the APF v13.
As of v13, the packages no longer come with metadata.json files and
now need to be processed with the babel linker plugin. This commit
sets up the linker plugin, and switches away from the deprecated
systemjs approach to a simpler rollup code-splitting variant.
PR Close#43431
Ngcc relies on cluster for distributing work. The master controller
sends messages to the workers as soon as the worker becomes `online`.
The online event is sent as part of the NodeJS cluster logic itself.
This does not work well because technically `online` could emit before the
worker started listening (this seems to be case now with ESM as the
imports are loaded in a way where `online` emits too early; before the
worker actually listens for messages).
We fix this by explicitly notifying the master when the worker
is ready for retrieving IPC messages/or tasks. This is more safe
anyway as it's not clearly specified when `online` emits.
PR Close#43431
Given that we ship all of compiler-cli and localize in ESM
mode now, we need to use a ESM compatible version of Yargs.
The latest version seems ESM compatible but with some small
API changes. This commit updates Yargs and updates the command
line option code to use the new API.
PR Close#43431
Updates the lock file resolution logic in ngcc to work with ESM output.
The compiler-cli is now shipped in bundles, so the actual module resolution
needs to stay to keep the lock file path consistent regardless of where the
lock file code is bundled into. The ngcc integration test needs to be updated
though since the `ngcc` entry-point will always reside in the `bundles/` directory
now.
It has been considered using the top-level `package.json` of the compiler-cli
package, but that caused problems in tests down the line because the ngcc
tests only have the `@angular/compiler-cli/ngcc/...` targets linked into
the node modules. It's not worth changing this and reworking tests if ngcc
is going away in the future anyway (+ it has been like that before!).
PR Close#43431
Switches the compiler-cli usage of `__filename` to `import.meta.url`
when ESM bundles are generated. Unfortunately we cannot start using
only `import.meta` yet as we still build and run all code in Angular
in CommonJS module output for devmode tests.
This commit also fixes various instances where a jasmine spy was applied on
a namespace export that will break with ES module (and the interop for
CommonJS output). We fix these spies by using a default import.
PR Close#43431
Removes the remaining usages of dynamic require statements in the
package output. Since we declare all shipped packages as strict ESM,
we cannot use dynamic require statements anymore. This commit switches
these usages to actual `import` statements.
Note: Tsickle continues to remain an optional dependency since bundling
does not work with its UMD package output. Also tsickle is rarely used by
consumers, if at all, so bundling does not really provide any significant
value. To continue keeping tsickle optional (since it's still needed by the
`annotateForClosureCompiler` option which is also respected in ngtsc), we
pass-through a tsickle instance as a parameter to `main`. This allows us to
keep the compile functions synchronous without having to refactor the majority
of the watch compilation code, and majority of tests for ngc, ngtsc.
Consumers (like the `ngc` bin entry-point) can then load tsickle based on their
module format. e.g. tsickle can be imported through `require` to keep everything
sync, but in ESM, the dynamic import can be used beforehand to pass `tsickle` to
the `main` function. We can revisit this in the future but for now this does the
trick without exceeding the scope of this commit..
PR Close#43431
As outlined in the previous commit which enabled the `esModuleInterop`
TypeScript compiler option, we need to update all namespace imports
for `typescript` to default imports. This is needed to allow for
TypeScript to be imported at runtime from an ES module.
Similar changes are needed for modules like `semver` where the types incorrectly
suggest named exports that will not exist at runtime when imported from ESM.
This commit refactors all imports to match with the lint rule we have
configured in the previous commit. See the previous commit for more
details on why certain imports have been changed.
A special case are the imports to `@babel/core` and `@babel/types`. For
these a special interop is needed as both default imports, or named
imports break the other module format. e.g default imports would work
well for ESM, but it breaks for CJS. For CJS, the named imports would
only work, but in ESM, only the default export exist. We work around
this for now until the devmode is using ESM as well (which would be
consistent with prodmode and gives us more valuable test results). More
details on the interop can be found in the `babel_core.ts` files (two
interops are needed for both localize/or the compiler-cli).
PR Close#43431
This wires up the `@angular/localize/tools` entry-point. For context:
This entry-point is being created to avoid deep imports into
`@angular/localize/src/tools/<..>` like the CLI relies on. Deep imports
do not play well with strict ESM, and now that all APF packages are
strict ESM, the tool code needs to be either strict ESM as well.
We use ESBuild to create individual bundles for the CLI entry-points,
and the actual tool entry-point. We use a bundler because this enables
the localize code be ESM compatible. Without a bundler, all relative imports
within the `tools` entry-point would need to explicitly have the `.js`
extension. This would be cumbersome and hard to maintain/enforce or
validate.
One might wonder why this is not a standard APF entry-point then. The
answer is that the APF entry-points do not support exposing the CLI
binaries (like `yarn localize-translate`). This could be done through
tertiary entry-points, but using ESBuild directly gives us more control
for now. We might want to revisit this in the future again.
PR Close#43431
We switched the build output for the compiler-cli to use esbuild-generated
bundles.
This means that actual devmode ES5 sources, or prodmode ES2020 non-bundled
sources are not actually needed. Only the types are needed, and this commit
makes sure only the type definitions are shipped. This reduces the code size
of the compiler-cli and also helps with avoiding incorrect module resolution.
PR Close#43431
The view engine language-service tests currently rely on the `npm_package` output
that is built locally. They rely on the package output mostly for
compiling test scenarios (with dependencies on e.g. forms), and for
the testing the metadata extraction (testing proper suggestions for VE).
The reliance on these packages becomes problematic with the new Angular
Package Format v13 where no metadata files are shipped. To continue
being able to test View Engine language-service compatibility, we will
use the v12.x framework packages for some of the test scenarios.
PR Close#43431
The View Engine ngc tests currently rely on the `npm_package` output
that is built locally. This becomes problematic with the new Angular
Package Format v13 where no metadata files are shipped. To continue
being able to test View Engine compilation, we will use the v12.x
framework packages for running the View Engine test.
Note: This means that we no longer test metadata extraction directly
for our framework packages, but given that any change to View Engine
will still land in patch, where the VE packaging still occurs, we should
be covered here.
PR Close#43431
ngcc currently dynamially loads the `Transformer` code. It does this
to avoid unnecessary parsing and loading of transformer-related code
if there is nothing to process (so-called noop case). Unfortunately
this dynamic require is not recognized by ESBuild. The import needs
to be discovered as otheriwse the transformer code would not be included
in the bundled package output of the CLI.
The ngcc code needs to use an async runtime import as it would work
in ES modules. This introduces async code into to the compililation
pipeline, breaking the `ngccMain` synchronous invocation feature.
To avoid this, we just move the dynamic require/async import to
the file top-level so that we do not break synchronous processing
which the CLI relies on. This has the downside of slowing-down
the noop case a little but I believe that should be mitigated
through bundling of ngcc anyway. In the future with full-ESM
we won't be able to get around this anyway (unless we remove the
sync variant of ngcc processing).
PR Close#43431
Exposes code needed by the Angular CLI. Previously the CLI used
deep imports for most of these things, but now with bundling
the CLI, we no longer support deep imports.
We will expose the necessary dependencies for the linker as part
of the primary entry-point (I think that is more maintable than
re-exporting them as part of the linker). We also expose the ngcc
entry-point for the CLI with a new constant that will point to the
ngcc command line entry-point (which the CLI relies on).
PR Close#43431
The Angular Core and localize package currently use deep imports for
code that is shipped. This is problematic as we want to ship the
compiler-cli as full-ESM. To achieve this we need to use a bundler and
this breaks deep imports.
We use a bundler for the compiler CLI because for full ESM
compatibility, we would need to explicitly add the `.js` extension
to all relative imports. This is very cumbersome and prone to mistakes
so to mitigate this problem in a safe way, we bundle the compiler-cli.
Note: Deep imports continue to exist for the language service as it
bundles the compiler-cli.
PR Close#43431
As part of APF v13, we ship Angular framework packages using partial
compilation. This is done in preparation of VE removal, and to
eventually get rid of `ngcc` processing.
The new library format allows libraries to switch away from the View
Engine package format without shipping Angular definitions with
instructions to NPM. This would make libraries tightly coupled to
specific versions of `@angular/core`.
Since Angular core is always compatible with itself, we always should
compile Angular core using full compilation mode. It is unreasonable
to ship Angular core with partial compilation output, especially since
we would need to export the linker `declare` functions in
`r3_symbols.ts` otherwise.
PR Close#43431
All other frameworks packages are now using APF v13 and are strict
ESM packages. The compiler-cli does not use APF and is currently shipped
with its devmode ES5 CommonJS sources. This is problematic as CommonJS
cannot simply import from ECMAScript modules (like `@angular/compiler`).
To fix this we use a bundler that allows us to ship the compiler-cli as
a strict ESM package. Note: An ESM can import from an ESM without any
problems. This is what we need hre.
Unfortunatley we need a bundler here because converting the compiler-cli
to ESM is non-trivial as relative imports would need an explicit
`.js` extension. This work can be simplified by using a bundler that
avoids relative imports completely.
Note: This commit uses code-splitting to create multiple bundle
entry-points for `yarn ngc, `yarn ngcc` etc. This commit removed
the old `ivy-ngcc` entry-point that just printed an error message
(to reduce amount of bundles having to be configured).
PR Close#43431
With the changes to support APF v13 in the `ng_package` rule, we have
removed the ambiguous `entry_point` attribute. The attribute suggested
that it would be used for determining the primary entry-point input
file. This was not the case as the flat module output file is consulted
for bundling et at. The attribute has been renamed to match its
purposed (renamed to `primary_bundle_name`).
We no longer need to set that attribute because the primary bundle
name is (1) not of relevance for consumers and (2) the rule already
infers the bundle name properly from the Bazel package.
PR Close#43431
Updates the primary tsconfig files to use ES2020 as target and module.
This helps IDEs and reflects what we generate in production, allowing
the use of JS features that are natively supported in APF v13.
PR Close#43431
Now that `Route.loadChildren` no longer accepts a string, there is no
need for tooling to find all string-based `loadChildren` to setup lazy
imports for them. As a result, the `listLazyRoutes` operation that
enumerates all string-based `loadChildren` occurrences is no longer
needed and is therefore removed from the compiler.
The `listLazyRoutes` API remains on the `Program` interface to avoid
breaking external tools that may be using this method, but those tools
should ultimately move away from using this API.
PR Close#43591
This commit removes the ability to configure lazy routes using a string
for `loadChildren`, together with the supporting classes to load an
`NgModuleFactory` at runtime.
BREAKING CHANGE:
It is no longer possible to use `Route.loadChildren` using a string
value. The following supporting classes were removed from
`@angular/core`:
- `NgModuleFactoryLoader`
- `SystemJsNgModuleFactoryLoader`
The `@angular/router` package no longer exports these symbols:
- `SpyNgModuleFactoryLoader`
- `DeprecatedLoadChildren`
The signature of the `setupTestingRouter` function from
`@angular/core/testing` has been changed to drop its `NgModuleFactoryLoader`
parameter, as an argument for that parameter can no longer be created.
PR Close#43591
When specifying the `deps` array in the `@Injectable` decorator to
inject dependencies into the injectable's factory function, it should
be possible to use an array literal to configure how the dependency
should be resolved by the DI system.
For example, the following example is allowed:
```ts
@Injectable({
providedIn: 'root',
useFactory: a => new AppService(a),
deps: [[new Optional(), 'a']],
})
export class AppService {
constructor(a) {}
}
```
Here, the `'a'` string token should be injected as optional. However,
the AOT compiler incorrectly used the array literal itself as injection
token, resulting in a failure at runtime. Only if the token were to be
provided using `[new Optional(), new Inject('a')]` would it work
correctly.
This commit fixes the issue by using the last non-decorator in the
array literal as the token value, instead of the array literal itself.
Note that this is a loose interpretation of array literals: if a token
is omitted from the array literal then the array literal itself is used
as token, but any decorator such as `new Optional()` would still have
been applied. When there's multiple tokens in the list then only the
last one will be used as actual token, any prior tokens are silently
ignored. This behavior mirrors the JIT interpretation so is kept as is
for now, but may benefit from some stricter checking and better error
reporting in the future.
Fixes#42987
PR Close#43226
Prior to this commit ngcc stored its package configuration in JavaScript
objects, which caused the builtin `Object` members to be found as
package configuration. This would subsequently crash as their shape was
not as expected.
This commit moves away from using raw JavaScript objects in favor of a
Map. To code was refactored such that `PartiallyProcessedConfig` is
now a class.
Fixes#43570
PR Close#43589
Native DOM events were previously not included in the completions
because the dom schema registry would filter out events completely. This
change updates the registry to include events in the private
element->property map and excludes events from lookups outside of the
new `allKnownEventsOfElement` function.
fixes https://github.com/angular/vscode-ng-language-service/issues/1479
PR Close#43299
Adds support for TypeScript 4.4. High-level overview of the changes made in this PR:
* Bumps the various packages to `typescript@4.4.2` and `tslib@2.3.0`.
* The `useUnknownInCatchVariables` compiler option has been disabled so that we don't have to cast error objects explicitly everywhere.
* TS now passes in a third argument to the `__spreadArray` call inside child class constructors. I had to update a couple of places in the runtime and ngcc to be able to pick up the calls correctly.
* TS now generates code like `(0, foo)(arg1, arg2)` for imported function calls. I had to update a few of our tests to account for it. See https://github.com/microsoft/TypeScript/pull/44624.
* Our `ngtsc` test setup calls the private `matchFiles` function from TS. I had to update our usage, because a new parameter was added.
* There was one place where we were setting the readonly `hasTrailingComma` property. I updated the usage to pass in the value when constructing the object instead.
* Some browser types were updated which meant that I had to resolve some trivial type errors.
* The downlevel decorators tranform was running into an issue where the Closure synthetic comments were being emitted twice. I've worked around it by recreating the class declaration node instead of cloning it.
PR Close#43281
Adds a test to the nullish coalescing diagnostic check to serve as
self-documentation on how it works with nullish coalescing on pipes that
are often misconfigured.
This also removes that non null assertion operator, which is incorrect
because there _are_ situations where a symbol cannot be retrieved.
PR Close#43419
Currently the compiler has three different classes to represent a "call to something":
1. `MethodCall` - `foo.bar()`
2. `SafeMethodCall` - `foo?.bar()`.
3. `FunctionCall` - Any calls that don't fit into the first two classes. E.g. `foo.bar()()`.
There are a few problems with this approach:
1. It is inconistent with the TypeScript AST which only has one node: `CallExpression`.
2. It means that we have to maintain more code, because the various parts of the compiler need to know about three node types.
3. It doesn't allow us to easily implement some new JS features like safe calls (e.g. `foo.bar?.())`).
These changes rework the compiler so that it produces only one node: `Call`. The new node behaves similarly to the TypeScript `CallExpression` whose `receiver` can be any expression.
There was a similar situation in the output AST where we had an `InvokeMethodExpression` and `InvokeFunctionExpression`. I've combined both of them into `InvokeFunctionExpression`.
PR Close#42882
The template type-checker has to emit type constructors for the
directives that are used in a template, where a type constructor's
declaration has to mirror the type parameter constraints as they were
originally declared. Therefore, the compiler analyzes whether a type
parameter constraint can be recreated, e.g. by generating imports for
any type references. Some type references cannot be recreated, in which
case the compiler has to fall back to a strategy where the type
constructor is created inline in the original source file (which comes
with a performance penalty).
There used to be an issue for type references to namespaced declarations.
The compiler is unable to emit such references such that an inline
type constructor should be used as fallback, but this did not happen.
This caused the attempt to emit the type reference to fail, as the
namespaced declaration cannot be located by the reference emitters.
This commit fixes the issue by using a stricter check to determine if a
type parameter requires an inline type constructor. The TypeScript
reflection host's `isStaticallyExported` logic was expanded to work for
any declaration instead of just classes, as e.g. type declarations can
also be referenced in a type parameter constraint.
Closes#43383
PR Close#43511
Previously, the way templates were tokenized meant that we lost information
about the location of interpolations if the template contained encoded HTML
entities. This meant that the mapping back to the source interpolated strings
could be offset incorrectly.
Also, the source-span assigned to an i18n message did not include leading
whitespace. This confused the output source-mappings so that the first text
nodes of the message stopped at the first non-whitespace character.
This commit makes use of the previous refactorings, where more fine grain
information was provided in text tokens, to enable the parser to identify
the location of the interpolations in the original source more accurately.
Fixes#41034
PR Close#43132
The lexer now splits encoded entity tokens out from text and attribute value tokens.
Previously encoded entities would be decoded and the decoded value would be
included as part of the text token of the surrounding text. Now the entities
have their own tokens. There are two scenarios: text and attribute values.
Previously the contents of `<div>Hello & goodbye</div>` would be a single
TEXT token. Now it will be three tokens:
```
TEXT: "Hello "
ENCODED_ENTITY: "&", "&"
TEXT: " goodbye"
```
Previously the attribute value in `<div title="Hello & goodbye">` would be
a single text token. Now it will be three tokens:
```
ATTR_VALUE_TEXT: "Hello "
ENCODED_ENTITY: "&", "&"
ATTR_VALUE_TEXT: " goodbye"
```
- ENCODED_ENTITY tokens have two parts: "decoded" and "encoded".
- ENCODED_ENTITY tokens are always preceded and followed by either TEXT tokens
or ATTR_VALUE_TEXT tokens, depending upon the context, even if they represent
an empty string.
The HTML parser has been modified to recombine these tokens to allow this
refactoring to have limited effect in this commit. Further refactorings
to use these new tokens will follow in subsequent commits.
PR Close#43132
Add an abstract class that has a default implementation of the run
function and visits all nodes. Authors of template checks can extend
this class and override the `visitNode` method to return diagnostics.
Refs #42966
PR Close#43232
In anticipation of the removal of the View Engine npm package output,
the integration tests of ngcc are switched to use @angular packages for
from npm. The version 12 packages are guaranteed to always be View
Engine format which makes them suitable to be processed in the ngcc
integration tests.
PR Close#43234
Previously, the decorator transformer was annotating the synthesized properties with TS type annotations. However, because it ran after the JSDoc transformer, the TS types were just dropped from the emitted JS. Attempting to move the decorator transformer before the JSDoc transformer causes tsickle crashes because synthetic AST fragments are not attached to a SourceFile node.
PR Close#43021
Add the call to get the extended template diagnostics in
the compiler's `getDiagnosticsForComponent`. This makes showing
extended diagnostics in non-ts files posible.
Refs #42966
PR Close#43134
Rename `getExtendedTemplateDiagnosticsForComponent` to
`getDiagnosticsForComponent` since it's implied they are extended
diagnostics.
Refs #42966
PR Close#43134
Return `TemplateDiagnostic` instead of `ts.Diagnostic` when getting the
extended template diagnostics. This makes the integration with the
language service easier. This also fixes the error code and now uses the
`ngErrorCode` for extended template diagnostics.
Refs #42966
PR Close#43134
This commit adds extended template diagnostics end-to-end tests, to make
sure the diagnostics are generated correctly. Template checks are
already tested with unit tests.
Refs #42966
PR Close#43107
This commit integrates extended template checks with the compiler, by
adding another phase of diagnostics generation. This integration is
under the `_extendedTemplateDiagnostics` flag.
Refs #42966
PR Close#43107
This commit exports the implementation of `ExtendedTemplateChecker` to
generate extended template diagnostics and all the template checks.
Refs #42966
PR Close#43107
Change the current way to run template checks to the
`ExtendedTemplateChecker` instead of just the
`getExtendedTemplateDiagnosticsForComponent` function. Refactored the
tests that used the previous function to use the new class.
Refs #42966
PR Close#43107
Previously with View Engine output, the `enableResourceInlining` option
could be set to inline external templates and styles (also for the
resulting `.metadata.json` files). We want to do the same for the Ivy
compilation pipeline (regardless of the compilation mode). The full
compilation definitions, and partial declarations currently already
inline resources in a way that no external requests need to be made.
Although there is one exception currently. These are the calls for
setting class metadata (for testbed overrides). This commit updates
the set class metadata calls (for both partial and full compilation)
to always inline resources. This means that libraries do not need
to start shipping external styles/templates just for the
`setClassMetadata` calls.
Note: Only doing this for partial compilation has been considered, but
it seems like it would be simpler implementation-wise to do this for
full compilation as well. Given the external resources are already
inlined (through their `ecmp` definitions), it seems acceptable (or
even more aligned) to do the same for the set class metadata calls.
PR Close#43178
The compliance tests can check source-map segments against expectations
encoded into the expectation files. Previously, the encoding of the expected
segment was only delimited by whitespace, but this made it difficult to identify
segments that started or ended with whitespace.
Now these segment expectations are wrapped in double-quotes which makes
it easier to read and understand the expectation files.
PR Close#43129
Add the implementation of a Template Check that ensures the correct
use of two-way binding syntax. Generates a warning when
'([foo])="bar"' is found instead of '[(foo)]="bar"'.
Refs #42966
PR Close#42984
Export `getSourceCodeForDiagnostic` from `ngtsc/testing` to make it
available for other packages. This will help confirm that the source
code is correct in other tests.
Refs #42966
PR Close#42984
This commit moves the test utils used in the typechecking tests into its
own package. This makes them available to be used in the tests of a
different package.
Refs #42966
PR Close#42984
specific
This commit makes the wrapper function `makeTemplateDiagnostic` take an
ErrorCode as a type for the `ts.Diagnostic`s to be generated.
Refs #42966
PR Close#42984
This commit introduces //packages/compiler-cli/src/ngtsc/typecheck/extended
as a container for a new phase of diagnostics generation. The API provides an
interface for new template checks to implement and generate template diagnostics.
Refs #42966
PR Close#42984
When the user tries to trigger suggestions from an interruption,
the LS should provide the global completions. For example,
`[input]="t¦"`, the `t` can be the `true` or the symbol from
the component context.
PR Close#42923
Previously, the way templates were tokenized meant that we lost information
about the location of interpolations if the template contained encoded HTML
entities. This meant that the mapping back to the source interpolated strings
could be offset incorrectly.
Also, the source-span assigned to an i18n message did not include leading
whitespace. This confused the output source-mappings so that the first text
nodes of the message stopped at the first non-whitespace character.
This commit makes use of the previous refactorings, where more fine grain
information was provided in text tokens, to enable the parser to identify
the location of the interpolations in the original source more accurately.
Fixes#41034
PR Close#42062
The compliance tests can check source-map segments against expectations
encoded into the expectation files. Previously, the encoding of the expected
segment was only delimited by whitespace, but this made it difficult to identify
segments that started or ended with whitespace.
Now these segment expectations are wrapped in double-quotes which makes
it easier to read and understand the expectation files.
PR Close#42062
Add a `makeTemplateDiagnostic` wrapper in the `TemplateTypeChecker`. This requiers less parameters to create template diagnostics, since the `TemplateTypeChecker` can get the templateId and mapping from it's scope with the `ts.ClassDeclartion`. The `TemplateTypeChecker` is often used to determine if a diagnostic should be produced, so it makes sense to have a function in it that helps create them.
Refs #42966
PR Close#42937
The compiler keeps track of how a declaration has been referenced
using absolute module imports and from which path the absolute module
should be resolved from. There was a bug in how the .d.ts metadata
extraction would incorrectly use the .d.ts file itself as resolution
context for symbols that had been imported using a relative module
specifier. This could result in module resolution failures.
For example, when extracting NgModule metadata from
`/node_modules/lib/index.d.ts` that looks like
```
import {LibDirective} from './dir';
@NgModule({
declarations: [LibDirective],
exports: [LibDirective],
})
export class LibModule {}
```
and `/app.module.ts` that contains
```
import {LibModule} from 'lib';
@NgModule({
imports: [LibModule],
})
export class AppModule {}
```
then `AppModule` would have recorded a reference to `LibModule` using
the `'lib'` module specifier. When extracting the NgModule metadata from
the `/node_modules/lib/index.d.ts` file the relative import into `./dir`
should also be assumed to be importable from `'lib'` (according to APF
where symbols need to be exported from a single entry-point)
so the reference to `LibDirective` should have `'lib'` as absolute
module specifier, but it would incorrectly have
`/node_modules/lib/index.d.ts` as resolution context path. The latter is
incorrect as `'lib'` needs to be resolved from `/app.module.ts` and not
from within the library itself.
Fixes#42810
PR Close#42879
In an incremental rebuild, the compiler attempts to reuse as much
analysis data from a prior compilation as possible to avoid doing the
analysis work again. For source files without Angular behavior however,
no analysis data would be recorded such that the source file had to be
reanalyzed each rebuild, even if it has not changed.
This commit avoids the analysis of such source files by registering
these files as not containing any Angular behavior; allowing subsequent
rebuilds to avoid the analysis work.
PR Close#42562
The static interpreter assumed that a foreign function expression would
have to be imported from the absolute module specifier that was used for
the foreign function itself. This assumption does not hold for the
`forwardRef` foreign function resolver, as that extracts the resolved
expression from the function's argument, which is not behind the
absolute module import of the `forwardRef` function.
The prior behavior has worked for the typical usage of `forwardRef`,
when it is contained within the same source file as where the static
evaluation started. In that case, the resulting reference would
incorrectly have an absolute module guess of `@angular/core`, but the
local identifier emit strategy was capable of emitting the reference
without generating an import using the absolute module guess.
In the scenario where the static interpreter would first have to follow
a reference to a different source that contained the `forwardRef` would
the compilation fail. In that case, there is no local identifier
available such that the absolute module emitter would try to locate the
imported symbol from `@angular/core`. which fails as the symbol is not
exported from there.
This commit fixes the issue by checking whether a foreign expression
occurs in the same source file as the call expression. If it does, then
the absolute module specifier that was used to resolve the call
expression is ignored.
Fixes#42865
PR Close#42887
For the compilation of a component, the compiler verifies that the
imports it needs to generate to reference the used directives and pipes
would not create an import cycle in the program. This requires visiting
the transitive import graphs of all directive/pipe usage in search of
the component file. The observation can be made that all directive/pipe
usages can leverage the exploration work in search of the component
file, thereby allowing sub-graphs of the import graph to be only visited
once instead of repeatedly per usage. Additionally, the transitive
imports of a file are no longer collected into a set to reduce memory
pressure.
PR Close#41271
In #41995 the type of `TrackByFunction` was changed such that the
declaration of a `trackBy` function did not cause the item type to be
widened to the `trackBy`'s item type, which may be a supertype of the
iterated type. This has introduced situations where the template type
checker is now reporting errors for cases where a `trackBy` function is
no longer assignable to `TrackByFunction`.
This commit fixes the error by also including the item type `T` in
addition to the constrained type parameter `U`, allowing TypeScript to
infer an appropriate `T`.
Fixes#42609
PR Close#42692
In combination with the TS `noImplicitOverride` compatibility changes,
we also want to follow the best-practice of adding `override` to
members which are implemented as part of abstract classes. This
commit fixes all instances which will be flagged as part of the
custom `no-implicit-override-abstract` TSLint rule.
PR Close#42512
Currently unless a listener inside of an embedded view tries to reference something from the parent view, or if the reference is a local ref, we don't generate the view restoration instructions and we allow for the value to be picked up from the context object in the function parameters. The problem is that the listener is only run during creation mode and the context object may have been swapped out afterwards.
These changes fix the issue by always generating the view restoration instructions for listeners inside templates.
Fixes#42698.
PR Close#42755
In #42492 the template type checker became capable of replicating a
wider range of generic type parameters for use in template type-check
files. Any literal types within a type parameter would however emit
invalid code, as TypeScript was emitting the literals using the text as
extracted from the template type-check file instead of the original
source file where the type node was taken from.
This commit works around the issue by cloning any literal types and
marking them as synthetic, signalling to TypeScript that the literal
text has to be extracted from the node itself instead from the source
file.
This commit also excludes `import()` type nodes from being supported,
as their module specifier may potentially need to be rewritten.
Fixes#42667
PR Close#42761
Updates the Bazel NodeJS rules to v4.0.0-beta.0. This is necessary
so that the Angular components repo can update, and it's generally
good to stay as up-to-date as possible with the Bazel rules as it's
easy to fall behind, and updating early allows us to discover issues
affecting our tooling earlier (where they are easier to address due to
e.g. potential breaking change policy).
PR Close#42760
Source files that contain directives or components that need an inline
type constructor or inline template type-check block would always be
considered as affected in incremental rebuilds. The inline operations
cause the source file to be updated in the TypeScript program that is
created for template type-checking, which becomes the reuse program
in a subsequent incremental rebuild.
In an incremental rebuild, the source files from the new user program
are compared to those from the reuse program. The updated source files
are not the same as the original source file from the user program, so
the incremental engine would mark the file which needed inline
operations as affected. This prevents incremental reuse for these files,
causing sub-optimal rebuild performance.
This commit attaches the original source file for source files that have
been updated with inline operations, such that the incremental engine
is able to compare source files using the original source file.
Fixes#42543
PR Close#42759
DTS bundling, will cause originally namespaced imports become namespace declarations within the same file. Example:
Before bundling
```ts
import * as i1 from './router';
export declare class RouterModule {
constructor(guard: any, router: Router);
static ɵmod: i0.ɵɵNgModuleDeclaration<RouterModule, [typeof i1.RouterOutlet...]>;
}
```
After bundling
```
declare namespace i1 {
export {
RouterOutletContract,
RouterOutlet
}
}
export declare class RouterModule {
constructor(guard: any, router: Router);
static ɵmod: i0.ɵɵNgModuleDeclaration<RouterModule, [typeof i1.RouterOutlet...]>;
}
```
And therefore this commit adds support for reflecting types that are defined in such namespace declarations.
Closes#42064
PR Close#42728
When the template type checker try to get a symbol of a template node, it will
not return the directives intended for an element on a microsyntax template,
for example, `<div *ngFor="let user of users;" dir>`, the `dir` will be skipped,
but it's needed in language service.
Fixes https://github.com/angular/vscode-ng-language-service/issues/1420
PR Close#42640
As of ES2021, JavaScript allows using underscores as separators inside numbers, in order to make them more readable (e.g. `1_000_000` vs `1000000`). TypeScript has had support for separators for a while so these changes expand the template parser to handle them as well.
PR Close#42672
The previous default algorithm was `md5`, which is not compliant with FIPS.
The default is now set to `sha256`, which is compliant.
Fixes#42577
PR Close#42582
The hash algorithm for the entry-point manifest was hardcoded to `md5`.
This can now be configured by the `hashAlgorithm` property on the
ngcc.config.js project configuration.
PR Close#42582
The ngcc configuration gets hashed to be used when caching
but it was hardcoded to use the `md5` algorithm, which is
not FIPS compliant.
Now the hash algorithm can be configured in the ngcc.config.js
file at the project level.
PR Close#42582
Adds support for shorthand property declarations inside Angular templates. E.g. doing `{foo, bar}` instead of `{foo: foo, bar: bar}`.
Fixes#10277.
PR Close#42421
Previously, the template type checker would only opt-in to inline type
constructors if it could import all type references from absolute module
specifiers. This limitation was put into place in an abundance of
caution as there was a safe, but less performant, fallback available.
The language service is not capable of using this fallback, which now
means that the limitation of absolute module specifiers limits the
language service's ability to use accurate types for component/directive
classes that have generic type parameters.
This commit loosens the restriction such that type references are now
eligible for emit as long as they are exported.
PR Close#42492
When a component/directive has a generic type parameter, the template
type checker attempts to translate the type parameter such that the
type parameters can be replicated in the type constructor that is
emitted into the typecheck file.
Type parameters with a default clause would incorrectly be emitted into
the typecheck file using the original `ts.TypeNode` for the default
clause, such that `ts.TypeReferenceNode`s within the default clause
would likely be invalid (i.e. referencing a type for which no import is
present in the typecheck file). This did not result in user-facing
type-check errors as errors reported in type constructors are not
translated into template positions Regardless, this commit ensures that
`ts.TypeReferenceNode`s within defaults are properly translated into the
typecheck file.
PR Close#42492
The template type checker is capable of recreating generic type bounds
in a different context, rewriting type references along the way (if
possible). This was previously done using a visitor that only supported
a limited set of types, resulting in the inability to emit all sorts of
types (even if they don't contain type references at all).
The inability to emit generic type bounds was not critical when the type
parameter emitting logic was introduced, as the compiler also has a
fallback strategy of creating inline type constructors. However, this
fallback is not available to the language service, resulting in
inaccurate types when components/directives use a complex generic type.
To mitigate this problem, the specialized visitor has been replaced with
a generalized TypeScript transform, where only type references get
special treatment. This allows for more complex types to be emitted,
such as union and intersection types, object literal types and tuple
types.
PR Close#42492
If an implcit receiver is accessed in a listener inside of an `ng-template`, we generate some extra code in order to ensure that we're assigning to the correct object. The problem is that the logic wasn't covering keyed writes which caused it to write to the wrong object and throw an assertion error at runtime.
These changes expand the logic to cover keyed writes.
Fixes#41267.
PR Close#42603
xi18n is the operation of extracting i18n messages from templates in the
compilation. Previously, only View Engine was able to perform xi18n. This
commit implements xi18n in the Ivy compiler, and a copy of the View Engine
test for Ivy verifies that the results are identical.
PR Close#42485
This commit moves some xi18n-related functions in the View Engine
ng.Program into a new file. This is necessary in order to depend on them
from the Ivy ng.Program while avoiding a cycle.
PR Close#42485
In watch builds, the compiler attempts to reuse as much information from
a prior compilation as possible. To accomplish this, it keeps a
reference to the most recently succeeded `TraitCompiler`, which contains
all analysis data for the program. However, `TraitCompiler` has an
internal reference to an `IncrementalBuild`, which is itself built on
top of its prior state. Consequently, all prior compilations continued
to be referenced, preventing garbage collection from cleaning up these
instances.
This commit changes the `AnalyzedIncrementalState` to no longer retain
a `TraitCompiler` instance, but only the analysis data it contains. This
breaks the retainer path to the prior incremental state, allowing it to
be garbage collected.
PR Close#42537
This is based on a discussion we had a few weeks ago. Currently if a component uses `ViewEncapsulation.ShadowDom` and its selector doesn't meet the requirements for a custom element tag name, a vague error will be thrown at runtime saying something like "Element does not support attachShadowRoot".
These changes add a new diagnostic to the compiler that validates the component selector and gives a better error message during compilation.
PR Close#42245
For quite a while it is an unspoken convention to add a trailing
new-line files within the Angular repository. This was never enforced
automatically, but has been frequently raised in pull requests through
manual review. This commit sets up a lint rule so that this is
"officially" enforced and doesn't require manual review.
PR Close#42478
Updates the compiler-cli compliance goldens. The golden updates are
required due to a regression in TypeScript 4.3 that causes the emitter
to not incorrectly preserve lines when emitting a node list.
This can be reverted once https://github.com/microsoft/TypeScript/pull/44070
is available.
PR Close#42022
Switches the repository to TypeScript 4.3 and the latest
version of tslib. This involves updating the peer dependency
ranges on `typescript` for the compiler CLI and for the Bazel
package. Tests for new TypeScript features have been added to
ensure compatibility with Angular's ngtsc compiler.
PR Close#42022
Currently we support safe property (`a?.b`) and method (`a?.b()`) accesses, but we don't handle safe keyed reads (`a?.[0]`) which is inconsistent. These changes expand the compiler in order to support safe key read expressions as well.
PR Close#41911
With the removal of the `ModuleWithProviders` transform in the parent commit,
the underlying dts transform can also be removed as it is not used elsewhere.
PR Close#41996
The `ModuleWithProviders` type has required a generic type since Angular 10,
so it is no longer necessary for the compiler to transform usages of the
`ModuleWithProviders` type without the generic type, as that should have
been reported as a compile error. This commit removes the detection logic
from ngtsc.
PR Close#41996
When a `trackBy` function is used that accepts a supertype of the iterated
array's type, the loop variable would undesirably be inferred as the supertype
instead of the array's item type. This commit adds an inferred type parameter
to `TrackByFunction` to allow an extra degree of freedom, enabling the
loop value to be inferred as the most narrow type.
Fixes#40125
PR Close#41995
The ngtsc test targets have fake declarations files for `@angular/core`
and `@angular/common` and the template type checking tests can leverage
the fake common declarations instead of declaring its own types.
PR Close#41995
Type-only imports are known to be elided by TypeScript, so the compiler
can be certain that such imports do not contribute to potential import
cycles. As such, type-only imports are no longer considered during cycle
analysis.
Regular import statements that would eventually be fully elided by
TypeScript during emit if none of the imported symbols are used in a
value position continue to be included in the cycle analysis, as the
cycle analyzer is unaware of these elision opportunities. Only explicit
`import type` statements are excluded.
PR Close#42453
The compiler flag `compileNonExportedClasses` allows the Angular compiler to
process classes which are not exported at the top level of a source file.
This is often used to allow for AOT compilation of test classes inside
`it()` test blocks, for example.
Previously, the compiler would identify exported classes by looking for an
`export` modifier on the class declaration itself. This works for the
trivial case, but fails for indirectly exported classes:
```typescript
// Component is declared unexported.
@Component({...})
class FooCmp {...}
// Indirect export of FooCmp
export {FooCmp};
```
This is not an immediate problem for most application builds, since the
default value for `compileNonExportedClasses` is `true` and therefore such
classes get compiled regardless.
However, in the Angular Language Service now, `compileNonExportedClasses` is
forcibly overridden to `false`. That's because the tsconfig used by the IDE
and Language Service is often far broader than the application build's
configuration, and pulls in test files that can contain unexported classes
not designed with AOT compilation in mind.
Therefore, the Language Service has trouble working with such structures.
In this commit, the `ReflectionHost` gains a new API for detecting whether a
class is exported. The implementation of this method now not only considers
the `export` modifier, but also scans the `ts.SourceFile` for indirect
exports like the example above. This ensures the above case will be
processed directly in the Language Service.
This new operation is cached using an expando symbol on the `ts.SourceFile`,
ensuring good performance even when scanning large source files with lots of
exports (e.g. a FESM file under `ngcc`).
Fixes#42184.
PR Close#42207
Update the supported range of node versions for to be less restrictive, no longer causing
yarn or npm to fail engine's checks for future versions of node.
While this change will no longer cause yarn or npm to fail these engine's check, this does
not reflect a change in the officially supported versions of node for Angular. Angular
continues to maintain support for Active LTS and Maintenance LTS versions of node.
PR Close#42205
Remove publishConfig property from the package.json entry for each of the entries in
the publish configuration. Using the wombat proxy is now ensured/managed by the
ng-dev release tooling.
PR Close#42104
Now that there is no need to work around the source-map bug in TypeScript
(https://github.com/Microsoft/TypeScript/issues/29300) we can just use
`resolvedTemplateUrl` for the source-map URL, rather than having a separate
property.
PR Close#42000
Indirect templates are templates produced by a non-literal expression value
of the `template` field in `@Component`. The compiler can statically
determine the template string, but there is not guaranteed to be a physical
file which contains the bytes of the template string. For example, the
template string may be computed by a concatenation expression: 'a' + 'b'.
Previously, the compiler would use the TS file path as the source map path
for indirect templates. This is incorrect, however, and breaks source
mapping for such templates, since the offsets within the template string do
not correspond to bytes of the TS file.
This commit returns the compiler to its old behavior for indirect templates,
which is to use `''` as the source map URL for such templates.
Fixes#40854
PR Close#41973
When `checkTypeOfPipes` is set to `false`, our TCB currently generates
the a statement like the following when pipes appear in the template:
`(_pipe1 as any).transform(args)`
This did enable us to get _some_ information from the Language Service
about pipes in this case because we still had access to the pipe
instance. However, because it is immediately cast to `any`, we cannot
get type information about the transform access. That means actions like "go to
definition", "find references", "quick info", etc. will return
incomplete information or fail altogether.
Instead, this commit changes the TCB to generate `(_pipe1.transform as any)(args)`.
This gives us the ability to get complete information for the LS
operations listed above.
PR Close#40523
This commit updates the logic in the LS renaming to handle renaming of
pipes, both from the name expression in the pipe metadata as well as
from the template.
The approach here is to introduce a new concept for renaming: an
"indirect" rename. In this type of rename, we find rename locations
in with the native TS Language Service using a different node than the
one we are renaming. Using pipes as an example, if we want to rename the
pipe name from the string literal expression, we use the transform
method to find rename locations rather than the string literal itself
(which will not return any results because it's just a string).
So the general approach is:
* Determine the details about the requested rename location, i.e. the
targeted template node and symbol for a template rename, or the TS
node for a rename outside a template.
* Using the details of the location, determine if the node is attempting
to rename something that is an indirect rename (pipes, selectors,
bindings). Other renames are considered "direct" and we use whatever
results the native TSLS returns for the rename locations.
* In the case of indirect renames, we throw out results that do not
appear in the templates (in this case, the shim files). These results will be
for the "indirect" rename that we don't want to touch, but are only
using to find template results.
* Create an additional rename result for the string literal expression
that is used for the input/output alias, the pipe name, or the
selector.
Note that renaming is moving towards being much more accurate in its
results than "find references". When the approach for renaming
stabilizes, we may want to then port the changes back to being shared
with the approach for retrieving references.
PR Close#40523
This allows the linker to be used as a true Babel plugin. In a Babel
configuration file, include the linker as follows:
```js
{
plugins: [
'@angular/compiler-cli/linker/babel',
]
}
```
or, if you need to specify configuration options:
```js
{
plugins: [
['@angular/compiler-cli/linker/babel', {linkerJitMode: true}],
]
}
```
PR Close#41918
This commit changes the reference emitters in the Ivy compiler to prefer
non-aliased exports if they exist. This avoids selecting "private
exports" that may not be stable, e.g. the reexports that have been added
by the View Engine compiler. Such reexports are not stable and are
therefore not suitable to be emitted into partial compilations, as the
output of partial compilations should only reference stable symbols
from upstream libraries.
An alternative solution has been considered where ViewEngine-generated
exports would gain a certain prefix, such that the Ivy compiler could
just exclude those exports (see #41443). However, that solution would
be insufficient in case a library is built using partial compilation and
while depending itself on a VE-compiled library from earlier versions of
Angular, where the magic prefix would be missing. For such libraries,
ngcc would have generated reexports using the declared name if not already
present so this change does result in choosing the correct export.
Because ngcc always generates reexports using the declared name even if
an aliased export is present, this change causes those ngcc-generated
exports to be chosen in downstream libraries using partial compilation.
This is unfortunate as it means that the declared names become
effectively public even if the library author was intentionally
exporting it using an alias. This commit does not address this problem;
it is expected that this should not result in widespread issues across
the library ecosystem.
Fixes#41277
PR Close#41866
Some partial libraries have been minified, which results in the declaration
calls being being converted from property accesses to indexed accesses.
This commit ensures that the linker can process these calls.
Fixes#41655
PR Close#41747
Some partial libraries have been minified, which results in boolean literals
being converted to `!0` and `!1`. This commit ensures that the linker can
process these values.
Fixes#41655
PR Close#41747
We have a check that determines whether to generate property binding instructions for an `ng-template`. The check looks at whether the tag name is exactly `ng-template`, but the problem is that if the tag is placed in a non-HTML namespace (e.g. `svg`), the tag name will actually be `:namespace:ng-template` and the check will fail.
These changes resolve the issue by looking at the tag name without the namespace.
Fixes#41308.
PR Close#41669
Currently if a component defines a template inline, but not through a
string literal, the partial compilation references the template expression
as is. This is problematic because the component declaration can no longer
be processed by the linker later as there is no static interpretation. e.g.
```js
const myTemplate = `...`;
TestCmp.ɵcmp = i0.ɵɵngDeclareComponent({
version: "0.0.0-PLACEHOLDER",
type: TestCmp,
selector: "test-cmp",
ngImport: i0,
template: myTemplate,
isInline: true
});
```
To fix this, we use the the resolved template in such cases so that
the linker can process the template/component declaration as expected.
PR Close#41583
With the introduction of the partial compilation, the Angular compiler's
existing `parseTemplate` method has been extended to pass through multiple
properties purely in favor of the partial compilation.
e.g. the `parseTemplate` function now accepts an "option" called `isInline`.
This option is just passed through and returned as part of the `ParsedTemplate`.
This is not ideal because the `parseTemplate` function doesn't care
whether the specified template was inline or not. This commit cleans
up the `parseTemplate` compiler function so that nothing needed only
for the partial compilation is added to it.
We introduce a new struct for additional template information that
is specific to the generation of the `declareComponent` function. With
that change, we can simplify the component decorator handler and keep
logic more local.
PR Close#41583
This adds string literals, number literals, `true`, `false`, `null` and
`undefined` to autocomplete results in templates.
For example, when completing an input of union type.
Component: `@Input('input') input!: 'a'|'b'|null;`
Template: `[input]="|"`
Provide `'a'`, `'b'`, and `null` as autocompletion entries.
Previously we did not include literal types because we only included
results from the component context (`ctx.`) and the template scope.
This is the second attempt at this. The first attempt is in
1d12c50f63 and it was reverted in 75f881e078.
PR Close#41645
This is follow-up from #41437 and it reduces the amount of code we generate for safe property accesses (`a?.b`) and nullish coalescing (`a ?? b`) by:
1. Reusing variables in nested nullish coalescing expressions.
2. Not initializing temporary variables to `null`. The way our code is generated means that the value will always be overwritten before we compare against it so the initializer didn't really matter.
Fixes#41491.
PR Close#41563
The asynchronous preprocessing check was not accounting for components that did not have any inline styles. In that case, the cache did not have an entry which then allowed the asynchronous check to run and fail the compilation. The caching during the asynchronous analysis phase now handles components without inline styles.
PR Close#41602
Previously, it was not possible to block a partial-linker from trying to
process a declaration that was defined in a newer version of Angular than
that of the partial-linker. For example, if a partial-linker was published as
part of version 12.0.0, there was no way for a partially-compiled declaration
compiled via version 13.0.0 to tell the 12.0.0 linker that it would be invalid
to attempt to process it.
This commit adds a new `minVersion` property to partial-declarations, which is
interpreted as the "minimum partial-linker version" that can process this
declaration. When selecting a partial-linker for such a declaration, the known
linker version ranges are checked to find the most recent linker whose version
range has an overlap with the interpreted declaration range.
This approach allows us to set a minimum version for a declaration, which
can inform an old partial-linker that will it not be able to accurately
process the declaration.
Note that any pre-release part to versions are ignored in this selection
process.
The file-linker can be configured, via the `unknownDeclarationVersionHandling`
property of `LinkerOptions`, to handle such a situation in one of three ways:
- `error` - the version mismatch is a fatal error
- `warn` - a warning is sent to the logger but the most recent partial-linker
will attempt to process the declaration anyway.
- `ignore` - the most recent partial-linker will, silently, attempt to process
the declaration.
The default is to throw an error.
Closes#41497
PR Close#41578
With this commit, the language service will first try to locate a
pre-compiled style file with the same name when a `css` is provided in
the `styleUrls`. This prevents a missing resource diagnostic for when the
compiled file is not available in the language service environment and also
allows "go to definition" to go to that pre-compiled file.
Fixes angular/vscode-ng-language-service#1263
PR Close#41538
This adds string literals, number literals, `true`, `false`, `null` and
`undefined` to autocomplete results in templates.
For example, when completing an input of union type.
Component: `@Input('input') input!: 'a'|'b'|null;`
Template: `[input]="|"`
Provide `'a'`, `'b'`, and `null` as autocompletion entries.
Previously we did not include literal types because we only included
results from the component context (`ctx.`) and the template scope.
PR Close#41456
There were three options being made available to users of the linker:
- ` enableI18nLegacyMessageIdFormat`
- `i18nNormalizeLineEndingsInICUs`
- ` i18nUseExternalIds`
None of these should actually be configurable at linking time
because partially-linked libraries have tighter restrictions on
what i18n options can be used.
This commit removes those options from the `LinkerOptions` interface.
It was considered to add a check for backwards compatibilty to ensure
that if these options were being passed, and were different to the expected
defaults, we would throw an informative error. But from looking at the
Angular CLI (the only known client of the linker) it has never been setting
these options so they have already always been set to the defaults.
BREAKING CHANGE:
Linked libraries no longer generate legacy i18n message ids. Any downstream
application that provides translations for these messages, will need to
migrate their message ids using the `localize-migrate` command line tool.
Closes#40673
PR Close#41554
Generally, the compiler assumes that `ts.SourceFile`s are immutable objects.
If a new `ts.Program` is compared to an old one, and a `ts.SourceFile`
within that program has not changed its object identity, the compiler will
assume that its prior analysis and understanding of that source file is
still valid.
However, not all TypeScript workflows uphold this assumption. For
`ts.Program`s that originate from the `ts.LanguageService`, some source
files may be re-parsed or otherwise undergo mutations without changing their
object identity. This breaks the compiler's incremental workflow.
Within such environments, it's necessary to track source file changes
differently. In addition to object identity, it's necessary to compare a
"version" string associated with each source file, between when that file is
analyzed originally and when a new program is presented that still contains
it. It's possible for the object identity of the source file to be the same,
but the version string to have changed, indicating that the source file
should be treated as changed.
This commit adds an optional method `getSourceFileVersion` to the
`ProgramDriver`, to provide access to version information if available. When
this method is present, the compiler will build a map of source file version
strings, and use this map to augment identity comparison during incremental
compilation.
PR Close#41475
This commit replaces the `IncrementalDriver` abstraction which powered
incremental compilation in the compiler with a new `IncrementalCompilation`
design. Principally, it separates two concerns which were tied together in
the previous implementation:
1. Tracking the reusable state of a compilation at any given point that
could be reused in a subsequent future compilation.
2. Making use of a prior compilation's state to accelerate the current one.
The new abstraction adds explicit tracking and types to deal with both of
these concerns separately, which greatly reduces the complexity of the state
tracking that `IncrementalDriver` used to perform.
PR Close#41475
The compiler frequently translates TypeScript source file `fileName` strings
into absolute paths, via a `fs.resolve()` operation. This is often done via
the helper function `absoluteFromSourceFile`.
This commit adds a caching mechanism whereby the `AbsoluteFsPath` of a
source file is patched onto the object under an Angular-specific symbol
property, allowing the compiler to avoid resolving the path on subsequent
calls.
PR Close#41475
This commit implements signature help in the Language Service, on top of
TypeScript's implementation within the TCB.
A separate PR adds support for translation of signature help data from TS'
API to the LSP in the Language Service extension.
PR Close#41581
When an Ivy NgModule is imported into a View Engine build, it doesn't have
metadata.json files that describe it as an NgModule, so it appears to VE
builds as a plain, undecorated class. The error message shown in this
situation generic and confusing, since it recommends adding an @NgModule
annotation to a class from a library.
This commit adds special detection into the View Engine compiler to give a
more specific error message when an Ivy NgModule is imported.
PR Close#41534
In the compiler, the `NgtscProgram` is responsible for creating the
`ts.Program` instance to use, potentially using a `ts.Program` from a
prior compilation to enable incremental compilation. It used to track
a `reuseTsProgram` for this purpose, however the `ts.Program` that
should be used as reuse program is also tracked by the `NgCompiler`
instance that is used by `NgtscProgram`. The `NgtscProgram` can leverage
the state from `NgCompiler` instead of keeping track of it by itself.
PR Close#41289
When multiple occurrences of the same package exist within a single
TypeScript compilation unit, TypeScript deduplicates the source files
by introducing redirected source file proxies. Such proxies are
recreated during an incremental compilation even if the original
declaration file did not change, which caused the compiler not to reuse
any work from the prior compilation.
This commit changes the incremental driver to recognize a redirected
source file and treat them as their unredirected source file.
PR Close#41448
In environments such as the Language Service where inline type-checking code
is not supported, the compiler would previously produce a diagnostic when a
template would require inlining to check. This happened whenever its
component class had generic parameters with bounds that could not be safely
reproduced in an external TCB. However, this created a bad user experience
for the Language Service, as its features would then not function with such
templates.
Instead, this commit changes the compiler to use the same strategy for
inline TCBs as it does for inline type constructors - falling back to `any`
for generic types when inlining isn't available. This allows the LS to
support such templates with slightly weaker type-checking semantics, which
a test verifies. There is still a case where components that aren't
exported require an inline TCB, and the compiler will still generate a
diagnostic if so.
Fixes#41395
PR Close#41513
Previously, the `DefaultImportRecorder` interface was used as follows:
1. During the analysis phase, the default import declaration of an
identifier was recorded.
2. During the emit phase each emitted identifier would be recorded.
The information from step 1 would then be used to determine the
default import declaration of the identifier which would be
registered as used.
3. A TypeScript transform would taint all default imports that were
registered as used in step 2 such that the imports are not elided
by TypeScript.
In incremental compilations, a file may have to be emitted even if its
analysis data has been reused from the prior compilation. This would
mean that step 1 is not executed, resulting in a mismatch in step 2 and
ultimately in incorrectly eliding the default. This was mitigated by
storing the mapping from identifier to import declaration on the
`ts.SourceFile` instead of a member of `DefaultImportTracker` such that
it would also be visible to the `DefaultImportRecorder` of subsequent
compiles even if step 1 had not been executed.
Ultimately however, the information that is being recorded into the
`DefaultImportRecorder` has a longer lifetime than a single
`DefaultImportRecorder` instance, as that is only valid during a single
compilation whereas the identifier to import declaration mapping
outlives a single compilation. This commit replaces the registration of
this mapping by attaching the default import declaration on the output
AST node that captures the identifier. This enables the removal of
all of the `DefaultImportRecorder` usages throughout the analysis phase
together with the `DefaultImportRecorder` interface itself.
PR Close#41557
The Angular compiler has to actively keep default import statements
alive if they were only used in type-only positions, but have been
emitted as value expressions for DI purposes. A problem occurred in
incremental recompilations, where the relationship between an identifier
usage and its corresponding default import would not be considered. This
could result in the removal of the default import statement and caused
a `ReferenceError` at runtime.
This commit fixes the issue by storing the association from an
identifier to its default import declaration on the source file itself,
instead of within the `DefaultImportTracker` instance. The
`DefaultImportTracker` instance is only valid for a single compilation,
whereas the association from an identifier to a default import
declaration is valid as long as the `ts.SourceFile` is the same
instance.
A subsequent commit refactor the `DefaultImportTracker` to no longer
be responsible for registering the association, as its lifetime is
conceptually too short to do so.
Fixes#41377
PR Close#41557
The `emitDecoratorMetadata` compiler option does not have to be enabled
as Angular decorators are transformed by the AOT compiler. Having the
option enabled in our tests can hide issues around import preservation,
as with `emitDecoratorMetadata` enabled the TypeScript compiler itself
does not elide imports even if they are only used in type-positions.
This is unlike having `emitDecoratorMetadata` disabled, however; in that
case the Angular compiler has to actively trick TypeScript into
retaining default imports when an identifier in a type-only position has
been reified into a value position for DI purposes.
A subsequent commit addresses a bug in default import preservation
that relies on this flag being `false`.
PR Close#41557
With this change we update several dependencies to avoid Renovate creating a lot of PRs during onboarding. We also remove yarn workspaces as after further analysis these are not needed.
Certain dependencies such as `@octokit/rest`, `remark` and `@babel/*` have not been updated as they require a decent amount of work to update, and it's best to leave them for a seperate PR.
PR Close#41434
This commit refactors the generated code for class metadata in partial
compilation mode. Instead of emitting class metadata into a top-level
`ɵsetClassMetadata` call guarded by `ngDevMode` flags, the class
metadata is now declared using a top-level `ɵɵngDeclareClassMetadata`
call.
PR Close#41200
This commit marks the `compilationMode` compiler option as stable, such
that libraries can be compiled in partial compilation mode.
In partial compilation mode, the compiler's output changes from fully
compiled AOT definitions to an intermediate form using partial
declarations. This form is suitable to be published to NPM, which now
allows libraries to be compiled and published using the Ivy compiler.
Please be aware that libraries that have been compiled using this mode
can only be used in Angular 12 applications and up; they cannot be used
when Ivy is disabled (i.e. when using View Engine) or in versions of
Angular prior to 12. The `compilationMode` option has no effect if
`enableIvy: false` is used.
Closes#41496
PR Close#41518
`NgCompiler` previously had a notion of the "next" `ts.Program`, which
served two purposes:
* it allowed a client using the `ts.createProgram` API to query for the
latest program produced by the previous `NgCompiler`, as a starting
point for building the _next_ program that incorporated any new user
changes.
* it allowed the old `NgCompiler` to be queried for the `ts.Program` on
which all prior state is based, which is needed to compute the delta
from the new program to ultimately determine how much of the prior
state can be reused.
This system contained a flaw: it relied on the `NgCompiler` knowing when
the `ts.Program` would be changed. This works fine for changes that
originate in `NgCompiler` APIs, but a client of the `TemplateTypeChecker`
may use that API in ways that create new `ts.Program`s without the
`NgCompiler`'s knowledge. This caused the `NgCompiler`'s concept of the
"next" program to get out of sync, causing incorrectness in future
incremental analysis.
This refactoring cleans up the compiler's `ts.Program` management in
several ways:
* `TypeCheckingProgramStrategy`, the API which controls `ts.Program`
updating, is renamed to the `ProgramDriver` and extracted to a separate
ngtsc package.
* It loses its responsibility of determining component shim filenames. That
functionality now lives exclusively in the template type-checking package.
* The "next" `ts.Program` concept is renamed to the "current" program, as
the "next" name was misleading in several ways.
* `NgCompiler` now wraps the `ProgramDriver` used in the
`TemplateTypeChecker` to know when a new `ts.Program` is created,
regardless of which API drove the creation, which actually fixes the bug.
PR Close#41291
This commit changes the partial compilation so that it outputs declarations
rather than definitions for injectables.
The JIT compiler and the linker are updated to be able to handle these
new declarations.
PR Close#41316
The other similar interfaces were renamed in https://github.com/angular/angular/pull/41119,
but this one was left since it had existed before Ivy. It looks like the interface was
never actually exposed on npm so it is safe to rename this one too.
PR Close#41316
Currently, we throw a FatalDiagnosticError when we fail to load a resource
(`templateUrl` or `styleUrl`) at various stages in the compiler. This prevents
analysis of the component from completing. This will result in in users not being
able to get any information in the component template when there is a missing
`styleUrl`, for example.
This commit simply tracks the diagnostic, marks the component as poisoned, and
continues merrily along. Environments configured to use poisoned data
(like the language service) will then be able to use other information from the analysis.
Fixes https://github.com/angular/vscode-ng-language-service/issues/1241
PR Close#41403
Currently, fs-extra is used to delete a directory recursively, but this is already available in native Node.JS. Hence, making this dependency redundant.
See: https://nodejs.org/docs/latest-v12.x/api/fs.html
PR Close#41445
This change introduces a new hook on the `ResourceHost` interface named `transformResource`.
Resource transformation allows both external and inline resources to be transformed prior to
compilation by the AOT compiler. This provides support for tooling integrations to enable
features such as preprocessor support for inline styles.
Only style resources are currently supported. However, the infrastructure is in place to add
template support in the future.
PR Close#41307
Adds perf tracing for the public methods in LanguageService. If the log level is verbose or higher,
trace performance results to the tsServer logger. This logger is implemented on the extension side
in angular/vscode-ng-language-service.
PR Close#41319
This enumeration will now start to appear in publicly facing code,
as part of declarations, so we remove the R3 to make it less specific
to the internal name for the Ivy renderer/compiler.
PR Close#41231
Each of the annotations had its own function for doing this, and those
methods were generally employing spread operators that could allow
unwanted properties to leak into the factory metadata object.
This commit supplies a shared function `toFactoryMetadata()` that
avoids this spread of properties into the returned function.
PR Close#41231
Now that other values were removed from `R3ResolvedDependencyType`,
its meaning can now be inferred from the other properties in the
`R3DeclareDependencyMetadata` type. This commit removes this enum
and updates the code to work without it.
PR Close#41231
When `ɵngDeclareInjector()` was implemented, the `factory` was moved
out to the `ɵfac` static property on the class. This check was not updated.
PR Close#41231
This instruction was created to work around a problem with injecting a
`ChangeDetectorRef` into a pipe. See #31438. This fix required special
metadata for when the thing being injected was a `ChangeDetectorRef`.
Now this is handled by adding a flag `InjectorFlags.ForPipe` to the
`ɵɵdirectiveInject()` call, which avoids the need to special test_cases
`ChangeDetectorRef` in the generated code.
PR Close#41231
This commit changes the partial compilation so that it outputs declaration
calls rather than compiled factory functions.
The JIT compiler and the linker are updated to be able to handle these
new declarations.
PR Close#41231
A previous commit implemented a streamlined performance metric reporting
system for the compiler-cli, controlled via the compiler option
`tracePerformance`.
This commit adds a custom Bazel flag rule //packages/compiler-cli:ng_perf
to the repository, and wires it through to the `ng_module` implementation
such that if the flag is set, `ng_module` will produce perf results as part
of the build. The underlying mechanism of `//:ng_perf` is not exported from
`@angular/bazel` as a public rule that consumers can use, so there is little
risk of accidental dependency on the contents of these perf traces.
An alias is added so that `--ng_perf` is a Bazel flag which works in our
repository.
PR Close#41125
ngtsc has an internal performance tracing package, which previously has not
really seen much use. It used to track performance statistics on a very
granular basis (microseconds per actual class analysis, for example). This
had two problems:
* it produced voluminous amounts of data, complicating the analysis of such
results and providing dubious value.
* it added nontrivial overhead to compilation when used (which also affected
the very performance of the operations being measured).
This commit replaces the old system with a streamlined performance tracing
setup which is lightweight and designed to be always-on. The new system
tracks 3 metrics:
* time taken by various phases and operations within the compiler
* events (counters) which measure the shape and size of the compilation
* memory usage measured at various points of the compilation process
If the compiler option `tracePerformance` is set, the compiler will
serialize these metrics to a JSON file at that location after compilation is
complete.
PR Close#41125
TypeScript 4.2 has changed its emitted syntax for synthetic constructors
when using `downlevelIteration`, which affects ES5 bundles that have
been downleveled from ES2015 bundles. This is typically the case for UMD
bundles in the APF spec, as they are generated by downleveling the
ESM2015 bundle into ES5. ngcc needs to detect the new syntax in order to
correctly identify synthesized constructor functions in ES5 bundles.
Fixes#41298
PR Close#41305
The Ivy Language Service uses the compiler's template type-checking engine,
which honors the configuration in the user's tsconfig.json. We recommend
that users upgrade to `strictTemplates` mode in their projects to take
advantage of the best possible type inference, and thus to have the best
experience in Language Service.
If a project is not using `strictTemplates`, then the compiler will not
leverage certain type inference options it has. One case where this is very
noticeable is the inference of let- variables for structural directives that
provide a template context guard (such as NgFor). Without `strictTemplates`,
these guards will not be applied and such variables will be inferred as
'any', degrading the user experience within Language Service.
This is working as designed, since the Language Service _should_ reflect
types exactly as the compiler sees them. However, the View Engine Language
Service used its own type system that _would_ infer these types even when
the compiler did not. As a result, it's confusing to some users why the
Ivy Language Service has "worse" type inference.
To address this confusion, this commit implements a suggestion diagnostic
which is shown in the Language Service for variables which could have been
narrowed via a context guard, but the type checking configuration didn't
allow it. This should make the reason why variables receive the 'any' type
as well as the action needed to improve the typings much more obvious,
improving the Language Service experience.
Fixes angular/vscode-ng-language-service#1155
Closes#41042
PR Close#41072
The `ɵɵInjectorDef` interface is internal and should not be published publicly
as part of libraries. This commit updates the compiler to render an opaque
type, `ɵɵInjectorDeclaration`, for this instead, which appears in the typings
for compiled libraries.
PR Close#41119
Th `ɵɵFactoryDef` type will appear in published libraries, via their typings
files, to describe what type dependencies a DI factory has. The parameters
on this type are used by tooling such as the Language Service to understand
the DI dependencies of the class being created by the factory.
This commit moves the type to the `public_definitions.ts` file alongside
the other types that have a similar role, and it renames it to `ɵɵFactoryDeclaration`
to align it with the other declaration types such as `ɵɵDirectiveDeclaration`
and so on.
PR Close#41119
These types are only used in the generated typings files to provide
information to the Angular compiler in order that it can compile code
in downstream libraries and applications.
This commit aliases these types to `unknown` to avoid exposing the
previous alias types such as `ɵɵDirectiveDef`, which are internal to
the compiler.
PR Close#41119
This commit fixes the behavior when creating a type constructor for a directive when the following
conditions are met.
1. The directive has bound generic parameters.
2. Inlining is not available. (This happens for language service compiles).
Previously, we would throw an error saying 'Inlining is not supported in this environment.' The
compiler would stop type checking, and the developer could lose out on getting errors after the
compiler gives up.
This commit adds a useInlineTypeConstructors to the type check config. When set to false, we use
`any` type for bound generic parameters to avoid crashing. When set to true, we inline the type
constructor when inlining is required.
Addresses #40963
PR Close#41043
For the tests in //packages/compiler-cli/src/ngtsc/typecheck, this
commits uses a `TypeCheckFile` for the environment, rather than a
`FakeEnvironment`. Using a real environment gives us more flexibility
with testing.
PR Close#41043
The partial declaration of a component includes the list of directives
that are used in its template, including some metadata of the directive
which can be used during actual compilation of the component. Used
components are currently part of this list, as components are also
directives. This commit splits the used components into a dedicate
property in the partial declaration, which allows for template
compilation to optimize the generated code for components.
PR Close#41104
This commit complements the support for the `__spreadArray` helper that
was added in microsoft/TypeScript#41523. The prior helpers `__spread`
and `__spreadArrays` used the `__read` helper internally, but the helper
is now emitted as an argument to `__spreadArray` so ngcc now needs to
support evaluating it statically. The real implementation of `__read`
reads an iterable into an array, but for ngcc's static evaluation
support it is sufficient to only deal with arrays as is. Additionally,
the optional `n` parameter is not supported as that is only emitted for
array destructuring syntax, which ngcc does not have to support.
PR Close#41201
In TypeScript 4.2 the `__spread` and `__spreadArrays` helpers were both
replaced by the new helper function `__spreadArray` in
microsoft/TypeScript#41523. These helpers may be used in downleveled
JavaScript bundles that ngcc has to process, so ngcc has the ability to
statically detect these helpers and provide evaluation logic for them.
Because Angular is adopting support for TypeScript 4.2 it becomes
possible for libraries to be compiled by TypeScript 4.2 and thus ngcc
has to add support for the `__spreadArray` helper. The deprecated
`__spread` and `__spreadArrays` helpers are not affected by this change.
Closes#40394
PR Close#41201
The recently introduced typings-only mode in ngcc would incorrectly
write compiled JavaScript files if typings-only mode was requested, in
case the typings of the entry-point had already been processed in a
prior run of ngcc. The corresponding format property for which the
JavaScript files were written were not marked as processed, though, as
the typings-only mode excluded the format property itself from being
marked as processed. Consequently, subsequent runs of ngcc would not
consider the entry-point to have been processed and recompile the
JavaScript bundle once more, resulting in duplicate ngcc imports.
Fixes#41198
PR Close#41209
This commit changes the partial compilation so that it outputs declaration
calls rather than definition calls for NgModules and Injectors.
The JIT compiler and the linker are updated to be able to handle these
new declarations.
PR Close#41080
There were a number of almost identical interfaces used in
the same way throughout the Render3 compiler code.
This commit changes the compiler to use the same interface
throughout.
PR Close#41080
This function is declared in multiple places. The instances inside
`compiler` are slightly different to those in `compiler-cli`. So this
commit consolidates them into two reusable functions.
PR Close#41080
BREAKING CHANGE:
Switching default of `emitDistinctChangesOnlyDefaultValue`
which changes the default behavior and may cause some applications which
rely on the incorrect behavior to fail.
`emitDistinctChangesOnly` flag has also been deprecated and will be
removed in a future major release.
The previous implementation would fire changes `QueryList.changes.subscribe`
whenever the `QueryList` was recomputed. This resulted in an artificially
high number of change notifications, as it is possible that recomputing
`QueryList` results in the same list. When the `QueryList` gets recomputed
is an implementation detail, and it should not be the thing that determines
how often change event should fire.
Unfortunately, fixing the behavior outright caused too many existing
applications to fail. For this reason, Angular considers this fix a
breaking fix and has introduced a flag in `@ContentChildren` and
`@ViewChildren`, that controls the behavior.
```
export class QueryCompWithStrictChangeEmitParent {
@ContentChildren('foo', {
// This option is the new default with this change.
emitDistinctChangesOnly: true,
})
foos!: QueryList<any>;
}
```
For backward compatibility before v12
`emitDistinctChangesOnlyDefaultValue` was set to `false. This change
changes the default to `true`.
PR Close#41121
The Angular compiler creates two `ts.Program`s; one for emit and one for
template type-checking. The creation of the type-check program could
benefit from reusing the `ts.ModuleResolutionCache` that was primed
during the creation of the emit program. This requires that the compiler
host implements `resolveModuleNames`, as otherwise TypeScript will setup
a `ts.ModuleResolutionHost` of its own for both programs.
This commit ensures that `resolveModuleNames` is always implemented,
even if the originally provided compiler host does not. This is
beneficial for the `ngc` binary.
PR Close#39693
Previously, injector definitions contained a `factory` property that
was used to create a new instance of the associated NgModule class.
Now this factory has been moved to its own `ɵfac` static property on the
NgModule class itself. This is inline with how directives, components and
pipes are created.
There is a small size increase to bundle sizes for each NgModule class,
because the `ɵfac` takes up a bit more space:
Before:
```js
let a = (() => {
class n {}
return n.\u0275mod = c.Cb({type: n}),
n.\u0275inj = c.Bb({factory: function(t) { return new (t || n) }, imports: [[e.a.forChild(s)], e.a]}),
n
})(),
```
After:
```js
let a = (() => {
class n {}
return n.\u0275fac = function(t) { return new (t || n) },
n.\u0275mod = c.Cb({type: n}),
n.\u0275inj = c.Bb({imports: [[r.a.forChild(s)], r.a]}),
n
})(),
```
In other words `n.\u0275fac = ` is longer than `factory: ` (by 5 characters)
and only because the tooling insists on encoding `ɵ` as `\u0275`.
This can be mitigated in a future PR by only generating the `ɵfac` property
if it is actually needed.
PR Close#41022
This commit adds a semi-comprehensive README file which describes the
design goals and implementation of the template type checking engine,
which powers the Angular Language Service as well as the main compiler's
understanding of types in templates.
PR Close#41004
The compiler performs cycle analysis for the used directives and pipes
of a component's template to avoid introducing a cyclic import into the
generated output. The used directives and pipes are represented by their
output expression which would typically be an `ExternalExpr`; those are
responsible for the generation of an `import` statement. Cycle analysis
needs to determine the `ts.SourceFile` that would end up being imported
by these `ExternalExpr`s, as the `ts.SourceFile` is then checked against
the program's `ImportGraph` to determine if the import is allowed, i.e.
does not introduce a cycle. To accomplish this, the `ExternalExpr` was
dissected and ran through module resolution to obtain the imported
`ts.SourceFile`.
This module resolution step is relatively expensive, as it typically
needs to hit the filesystem. Even in the presence of a module resolution
cache would these module resolution requests generally see cache misses,
as the generated import originates from a file for which the cache has
not previously seen the imported module specifier.
This commit removes the need for the module resolution by wrapping the
generated `Expression` in an `EmittedReference` struct. This allows the
reference emitter mechanism that is responsible for generating the
`Expression` to also communicate from which `ts.SourceFile` the
generated `Expression` would be imported, precluding the need for module
resolution down the road.
PR Close#40948
The import graph scans source files for its import and export statements
to extract the source files that it imports/exports. Such statements
contain a module specifier string and this module specifier used to be
resolved to the actual source file using an explicit module resolution
step. This is especially expensive in incremental rebuilds, as the
module resolution cache has not been primed during program creation
(assuming that the incremental program was able to reuse the module
resolution results from a prior compilation). This meant that all module
resolution requests would have to hit the filesystem, which is
relatively slow.
This commit is able to replace the module resolution with TypeScript's
bound symbol of the module specifier. This symbol corresponds with the
`ts.SourceFile` that is being imported/exported, which is exactly what
the import graph was interested in. As a result, no filesystem accesses
are done anymore.
PR Close#40948
This change marks all relevant define* callsites as pure, causing the compiler to
emmit either @__PURE__ or @pureOrBreakMyCode annotation based on whether we are
compiling code annotated for closure or terser.
This change is needed in g3 where we don't run build optimizer but we
need the code to be annotated for the closure compiler.
Additionally this change allows for simplification of CLI and build optimizer as they
will no longer need to rewrite the generated code (there are still other places where
a build optimizer rewrite will be necessary so we can't remove it, we can only simplify it).
PR Close#41096
In Angular programs, changing a file may require other files to be
emitted as well due to implicit NgModule dependencies. For example, if
the selector of a directive is changed then all components that have
that directive in their compilation scope need to be recompiled, as the
change of selector may affect the directive matching results.
Until now, the compiler solved this problem using a single dependency
graph. The implicit NgModule dependencies were represented in this
graph, such that a changed file would correctly also cause other files
to be re-emitted. This approach is limited in a few ways:
1. The file dependency graph is used to determine whether it is safe to
reuse the analysis data of an Angular decorated class. This analysis
data is invariant to unrelated changes to the NgModule scope, but
because the single dependency graph also tracked the implicit
NgModule dependencies the compiler had to consider analysis data as
stale far more often than necessary.
2. It is typical for a change to e.g. a directive to not affect its
public API—its selector, inputs, outputs, or exportAs clause—in which
case there is no need to re-emit all declarations in scope, as their
compilation output wouldn't have changed.
This commit implements a mechanism by which the compiler is able to
determine the impact of a change by comparing it to the prior
compilation. To achieve this, a new graph is maintained that tracks all
public API information of all Angular decorated symbols. During an
incremental compilation this information is compared to the information
that was captured in the most recently succeeded compilation. This
determines the exact impact of the changes to the public API, which
is then used to determine which files need to be re-emitted.
Note that the file dependency graph remains, as it is still used to
track the dependencies of analysis data. This graph does no longer track
the implicit NgModule dependencies, which allows for better reuse of
analysis data.
These changes also fix a bug where template type-checking would fail to
incorporate changes made to a transitive base class of a
directive/component. This used to be a problem because transitive base
classes were not recorded as a transitive dependency in the file
dependency graph, such that prior type-check blocks would erroneously
be reused.
This commit also fixes an incorrectness where a change to a declaration
in NgModule `A` would not cause the declarations in NgModules that
import from NgModule `A` to be re-emitted. This was intentionally
incorrect as otherwise the performance of incremental rebuilds would
have been far worse. This is no longer a concern, as the compiler is now
able to only re-emit when actually necessary.
Fixes#34867Fixes#40635Closes#40728
PR Close#40947
For certain generated function calls, the compiler emits a 'PURE' annotation
which informs Terser (the optimizer) about the purity of a specific function
call. This commit expands that system to produce a new Closure-specific
'pureOrBreakMyCode' annotation when targeting the Closure optimizer instead
of Terser.
PR Close#41021
The current logic in the compiler is to bail when there are errors when
parsing a template into an HTML AST or when there are errors in the i18n
metadata. As a result, a template with these types of parse errors
_will not have any information for the language service_. This is because we
never attempt to conver the HTML AST to a template AST in these
scenarios, so there are no template AST nodes for the language service
to look at for information. In addition, this also means that the errors
are never displayed in the template to the user because there are no
nodes to map the error to.
This commit adds an option to the template parser to temporarily ignore
the html parse and i18n meta errors and always perform the template AST
conversion. At the end, the i18n and HTML parse errors are appended to
the returned errors list. While this seems risky, it at least provides
us with more information than we had before (which was 0) and it's only
done in the context of the language service, when the compiler is
configured to use poisoned data (HTML parse and i18n meta errors can be
interpreted as a "poisoned" template).
fixes angular/vscode-ng-language-service#1140
PR Close#41068
1. The error function throws, so no code after it is reachable.
2. Some switch statements are exhaustive, so no code after them are reachable.
PR Close#40984
Ngcc uses the `paths` property to compute the potential base-paths
for packages that are being processed. If the `paths` contain a wildcard
`*` within a path segment, ngcc was not finding the base-path correctly.
Now when a wildcard is found, there is an additional search to look for
paths that might match the wildcard.
Fixes#41014
PR Close#41033
Previously, when `ngcc` encountered an entry-point with a format-path
that pointed to a non-existing or empty file it would throw an error and
stop processing the remaining tasks.
In the past, we used to ignore such format-paths and continue processing
the rest of the tasks ([see code][1]). This was changed to a hard
failure in 2954d1b5ca. Looking at the code
history, the reason for changing the behavior was an (incorrect)
assumption that the condition could not fail. This assumption failed to
take into account the case where a 3rd-party library has an invalid
format-path in its `package.json`. This is an issue with the library,
but it should not prevent `ngcc` from processing other
packages/entry-points/formats.
This commit fixes this by reporting the task as failed but not throwing
an error, thus allowing `ngcc` to continue processing other tasks.
[1]: https://github.com/angular/angular/blob/3077c9a1f89c5bd75fb96c16e/packages/compiler-cli/ngcc/src/main.ts#L124Fixes#40965
PR Close#40985
Some tools (such as Language Server and ng-packagr) only care about
the processed typings generated by ngcc. Forcing these tools to process
the JavaScript files as well has two disadvantages:
First, unnecessary work is being done, which is time consuming.
But more importantly, it is not always possible to know how the final bundling
tools will want the processed JavaScript to be configured. For example,
the CLI would prefer the `--create-ivy-entry-points` option but this would
break non-CLI build tooling.
This commit adds a new option (`--typings-only` on the command line, and
`typingsOnly` via programmatic API) that instructs ngcc to only render changes
to the typings files for the entry-points that it finds, and not to write any
JavaScript files.
In order to process the typings, a JavaScript format will need to be analysed, but
it will not be rendered to disk. When using this option, it is best to offer ngcc a
wide range of possible JavaScript formats to choose from, and it will use the
first format that it finds. Ideally you would configure it to try the `ES2015` FESM
format first, since this will be the most performant.
Fixes#40969
PR Close#40976
With this change we drop support for zone.js 0.10.x.
This is needed because in version 12 the CLI will only work with `~0.11.4`. See angular/angular-cli#20034.
BREAKING CHANGE:
Minimum supported `zone.js` version is `0.11.4`
PR Close#40823
This commit moves a constant which is affected by a g3 sync patch into a
separate file. This way, changes to the rest of the compiler codebase have
no chance of conflicting with the patched code.
PR Close#40950
This is a pre-requisite for #40360. Given the following template which has a listener
that references a variable from a parent template (`name`):
```
<ng-template let-name="name">
<button (click)="hello(name)"></button>
</ng-template>
```
We generate code that looks that looks like. Note how we access `name` through `ctx`:
```js
function template(rf, ctx) {
if (rf & 1) {
const r0 = ɵɵgetCurrentView();
ɵɵelementStart(0, "button", 2);
ɵɵlistener("click", function() {
ɵɵrestoreView(r0);
const name_r0 = ctx.name; // Note the `ctx.name` access here.
const ctx_r1 = ɵɵnextContext();
return ctx_r1.log(name_r0);
});
ɵɵelementEnd();
}
}
```
This works fine at the moment, because the template context object can't be changed after creation.
The changes in #40360 allow for the object to be changed, which means that the `ctx` reference
inside the listener will be out of date, because it was bound during creation mode.
This PR aims to address the issue by accessing the context inside listeners through the saved
view reference. With the new code, the generated code from above will look as follows:
```js
function template(rf, ctx) {
if (rf & 1) {
const r0 = ɵɵgetCurrentView();
ɵɵelementStart(0, "button", 2);
ɵɵlistener("click", function() {
const restoredCtx = ɵɵrestoreView(r0);
const name_r0 = restoredCtx.name;
const ctx_r1 = ɵɵnextContext();
return ctx_r1.log(name_r0);
});
ɵɵelementEnd();
}
}
```
PR Close#40833
Our approach for handling cyclic imports results in code that is
not easy to tree-shake, so it is not suitable for publishing in a
library.
When compiling in partial compilation mode, we are targeting
such library publication, so we now create a fatal diagnostic
error instead of trying to handle the cyclic import situation.
Closes#40678
PR Close#40782
This commit implements creating of `ɵɵngDeclarePipe()` calls in partial
compilation, and processing of those calls in the linker and JIT compiler.
See #40677
PR Close#40803
This commit causes imports added by ngtsc's `ImportManager` to have their
TypeScript "original node" set to the generated `ts.ImportDeclaration`
statement.
In g3, the tsickle transformer runs after the Angular transformer and post-
processes Angular's compilation output. One of its post-processing tasks is
to transform generated imports and references to imported symbols from the
commonjs module system to the g3 module system. Part of this transformation
involves recognizing modules with specific metadata and altering references
to symbols from those modules accordingly.
Normally, tsickle can rely on TypeScript's binding for an imported symbol to
find its origin module and thus the correct metadata for the symbol. However
the Angular transform generates new synthetic imports which don't have such
binding information. Angular's imports are always namespace imports of the
form:
```
import * as qualifier 'module/specifier';
```
References to such an import are then of the form `qualifier.SymbolName`.
To process such imports properly, tsickle needs to be able to associate the
reference to `qualifier` in the expression `qualifer.SymbolName` with the
`ts.ImportDeclaration` statement that defines it. It expects to do this by
looking at the `ts.getOriginalNode()` for the `qualifier` reference, which
should be the `ts.ImportDeclaration`. This commit changes ngtsc's import
generation mechanism to set the original node on `qualifier` identifiers
according to this expectation.
This commit is not tested in the direct compiler tests, since:
1) there is no observable behavior externally from setting the original node
2) we don't have tests that intercept transformer operations (which could be
used to directly assert against the AST nodes)
3) tsickle's published version does not (yet) contain the g3-specific
transformations which rely on the original node and would thus allow the
behavior to be observed.
Instead, we rely on the g3 testing suite to validate the correctness of this
fix. Breaking this functionality would cause g3 compilation errors for
targets, since tsickle would be unable to transform imports correctly.
PR Close#40711
In 5c547675b1 the `EventEmitter.subscribe`
API was extended with a new signature that allows the emitter's generic
type `T` to flow into the subscribe callback. This new signature removes
the need for the special `_outputHelper` function that used to be
emitted into TCBs when `strictOutputEventTypes`/`strictTemplates` is
enabled.
PR Close#40738
Produces a diagnostic when we cannot resolve a component's external style sheet or external template.
The previous behavior was to throw an exception, which crashed the
Language Service.
fixes angular/vscode-ng-language-service#1079
PR Close#40660
