Update tuf/api/pylintrc for new code

The updated pylintrc is based on the Google Python Style Guide
pylint configuration at
https://google.github.io/styleguide/pylintrc with the following
differences:
- We don't list defaults which are applied anyway.
- We don't configure checks that seem unrelated to the code style
  guide.
- We don't disable any checks that are not in conflict with the
  current code or code style guide.

This has the advantage of a minimal configuration file which should
be easy to maintain and extend as required, e.g. if conflicting
code is added, or linting time becomes too long, due to unnecessary
checks.

Signed-off-by: Lukas Puehringer <lukas.puehringer@nyu.edu>

tuf/api/pylintrc

@@ -1,12 +1,50 @@
-[MESSAGE_CONTROL]
-disable=fixme
+# Minimal pylint configuration file for Secure Systems Lab Python Style Guide:
+#     https://github.com/secure-systems-lab/code-style-guidelines
+#
+# Based on Google Python Style Guide pylintrc and pylint defaults:
+#     https://google.github.io/styleguide/pylintrc
+#     http://pylint.pycqa.org/en/latest/technical_reference/features.html
+
+[MESSAGES CONTROL]
+# Disable the message, report, category or checker with the given id(s).
+# NOTE: To keep this config as short as possible we only disable checks that
+# are currently in conflict with our code. If new code displeases the linter
+# (for good reasons) consider updating this config file, or disable checks with
+# 'pylint: disable=XYZ' comments.
+disable=fixme,
+        too-few-public-methods,
+        too-many-arguments,
 
 [BASIC]
-good-names=e
+good-names=i,j,k,v,e,f,fn,fp,_type
+# Regexes for allowed names are copied from the Google pylintrc
+# NOTE: Pylint captures regex name groups such as 'snake_case' or 'camel_case'.
+# If there are multiple groups it enfoces the prevalent naming style inside
+# each modules. Names in the exempt capturing group are ignored.
+function-rgx=^(?:(?P<exempt>setUp|tearDown|setUpModule|tearDownModule)|(?P<camel_case>_?[A-Z][a-zA-Z0-9]*)|(?P<snake_case>_?[a-z][a-z0-9_]*))$
+method-rgx=(?x)^(?:(?P<exempt>_[a-z0-9_]+__|runTest|setUp|tearDown|setUpTestCase|tearDownTestCase|setupSelf|tearDownClass|setUpClass|(test|assert)_*[A-Z0-9][a-zA-Z0-9_]*|next)|(?P<camel_case>_{0,2}[A-Z][a-zA-Z0-9_]*)|(?P<snake_case>_{0,2}[a-z][a-z0-9_]*))$
+argument-rgx=^[a-z][a-z0-9_]*$
+attr-rgx=^_{0,2}[a-z][a-z0-9_]*$
+class-attribute-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
+class-rgx=^_?[A-Z][a-zA-Z0-9]*$
+const-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
+inlinevar-rgx=^[a-z][a-z0-9_]*$
+module-rgx=^(_?[a-z][a-z0-9_]*|__init__)$
+no-docstring-rgx=(__.*__|main|test.*|.*test|.*Test)$
+variable-rgx=^[a-z][a-z0-9_]*$
+docstring-min-length=10
 
 [FORMAT]
+ignore-long-lines=(?x)(
+  ^\s*(\#\ )?<?https?://\S+>?$|
+  ^\s*(from\s+\S+\s+)?import\s+.+$)
 indent-string="    "
-max-line-length=79
+indent-after-paren=4
+max-line-length=80
+single-line-if-stmt=yes
 
-[DESIGN]
-min-public-methods=0
+[LOGGING]
+logging-format-style: new
+
+[MISCELLANEOUS]
+notes=TODO