file history rename detection

find more renames that git-log --follow would

simplify

asyncgit/src/sync/commit_files.rs

@@ -3,10 +3,10 @@
 use super::{diff::DiffOptions, CommitId, RepoPath};
 use crate::{
 	error::Result,
-	sync::{get_stashes, repository::repo},
-	StatusItem, StatusItemType,
+	sync::{get_stashes, repository::repo, utils::bytes2string},
+	Error, StatusItem, StatusItemType,
 };
-use git2::{Diff, Repository};
+use git2::{Diff, DiffFindOptions, Repository};
 use scopetime::scope_time;
 use std::{cmp::Ordering, collections::HashSet};
 
@@ -153,14 +153,94 @@ pub(crate) fn get_commit_diff<'a>(
 	Ok(diff)
 }
 
+///
+pub(crate) fn commit_contains_file(
+	repo: &Repository,
+	id: CommitId,
+	pathspec: &str,
+) -> Result<Option<git2::Delta>> {
+	let commit = repo.find_commit(id.into())?;
+	let commit_tree = commit.tree()?;
+
+	let parent = if commit.parent_count() > 0 {
+		repo.find_commit(commit.parent_id(0)?)
+			.ok()
+			.and_then(|c| c.tree().ok())
+	} else {
+		None
+	};
+
+	let mut opts = git2::DiffOptions::new();
+	opts.pathspec(pathspec.to_string())
+		.skip_binary_check(true)
+		.context_lines(0);
+
+	let diff = repo.diff_tree_to_tree(
+		parent.as_ref(),
+		Some(&commit_tree),
+		Some(&mut opts),
+	)?;
+
+	if diff.stats()?.files_changed() == 0 {
+		return Ok(None);
+	}
+
+	Ok(diff.deltas().map(|delta| delta.status()).next())
+}
+
+///
+pub(crate) fn commit_detect_file_rename(
+	repo: &Repository,
+	id: CommitId,
+	pathspec: &str,
+) -> Result<Option<String>> {
+	scope_time!("commit_detect_file_rename");
+
+	let mut diff = get_commit_diff(repo, id, None, None, None)?;
+
+	diff.find_similar(Some(
+		DiffFindOptions::new()
+			.renames(true)
+			.renames_from_rewrites(true)
+			.rename_from_rewrite_threshold(100),
+	))?;
+
+	let current_path = std::path::Path::new(pathspec);
+
+	for delta in diff.deltas() {
+		let new_file_matches = delta
+			.new_file()
+			.path()
+			.map(|path| path == current_path)
+			.unwrap_or_default();
+
+		if new_file_matches
+			&& matches!(delta.status(), git2::Delta::Renamed)
+		{
+			return Ok(Some(bytes2string(
+				delta.old_file().path_bytes().ok_or_else(|| {
+					Error::Generic(String::from("old_file error"))
+				})?,
+			)?));
+		}
+	}
+
+	Ok(None)
+}
+
 #[cfg(test)]
 mod tests {
 	use super::get_commit_files;
 	use crate::{
 		error::Result,
 		sync::{
-			commit, stage_add_file, stash_save,
-			tests::{get_statuses, repo_init},
+			commit,
+			commit_files::commit_detect_file_rename,
+			stage_add_all, stage_add_file, stash_save,
+			tests::{
+				get_statuses, rename_file, repo_init,
+				repo_init_empty, write_commit_file,
+			},
 			RepoPath,
 		},
 		StatusItemType,
@@ -240,4 +320,28 @@ mod tests {
 
 		Ok(())
 	}
+
+	#[test]
+	fn test_rename_detection() {
+		let (td, repo) = repo_init_empty().unwrap();
+		let repo_path: RepoPath = td.path().into();
+
+		write_commit_file(&repo, "foo.txt", "foobar", "c1");
+		rename_file(&repo, "foo.txt", "bar.txt");
+		stage_add_all(
+			&repo_path,
+			"*",
+			Some(crate::sync::ShowUntrackedFilesConfig::All),
+		)
+		.unwrap();
+		let rename_commit = commit(&repo_path, "c2").unwrap();
+
+		let rename = commit_detect_file_rename(
+			&repo,
+			rename_commit,
+			"bar.txt",
+		)
+		.unwrap();
+		assert_eq!(rename, Some(String::from("foo.txt")));
+	}
 }

asyncgit/src/sync/commit_filter.rs

@@ -1,9 +1,14 @@
-use super::{commit_files::get_commit_diff, CommitId};
-use crate::error::Result;
+use super::{
+	commit_files::{commit_contains_file, get_commit_diff},
+	CommitId,
+};
+use crate::{
+	error::Result, sync::commit_files::commit_detect_file_rename,
+};
 use bitflags::bitflags;
 use fuzzy_matcher::FuzzyMatcher;
 use git2::{Diff, Repository};
-use std::sync::Arc;
+use std::sync::{Arc, RwLock};
 
 ///
 pub type SharedCommitFilterFn = Arc<
@@ -11,22 +16,52 @@ pub type SharedCommitFilterFn = Arc<
 >;
 
 ///
-pub fn diff_contains_file(file_path: String) -> SharedCommitFilterFn {
+pub fn diff_contains_file(
+	file_path: Arc<RwLock<String>>,
+) -> SharedCommitFilterFn {
 	Arc::new(Box::new(
 		move |repo: &Repository,
 		      commit_id: &CommitId|
 		      -> Result<bool> {
-			let diff = get_commit_diff(
+			let current_file_path = file_path.read()?.to_string();
+
+			if let Some(delta) = commit_contains_file(
 				repo,
 				*commit_id,
-				Some(file_path.clone()),
-				None,
-				None,
-			)?;
+				current_file_path.as_str(),
+			)? {
+				//note: only do rename test in case file looks like being added in this commit
 
-			let contains_file = diff.deltas().len() > 0;
+				// log::info!(
+				// 	"edit: [{}] ({:?}) - {}",
+				// 	commit_id.get_short_string(),
+				// 	delta,
+				// 	&current_file_path
+				// );
 
-			Ok(contains_file)
+				if matches!(delta, git2::Delta::Added) {
+					let rename = commit_detect_file_rename(
+						repo,
+						*commit_id,
+						current_file_path.as_str(),
+					)?;
+
+					if let Some(old_name) = rename {
+						// log::info!(
+						// 	"rename: [{}] {:?} <- {:?}",
+						// 	commit_id.get_short_string(),
+						// 	current_file_path,
+						// 	old_name,
+						// );
+
+						(*file_path.write()?) = old_name;
+					}
+				}
+
+				return Ok(true);
+			}
+
+			Ok(false)
 		},
 	))
 }

asyncgit/src/sync/logwalker.rs

@@ -113,16 +113,17 @@ mod tests {
 	use super::*;
 	use crate::error::Result;
 	use crate::sync::commit_filter::{SearchFields, SearchOptions};
-	use crate::sync::tests::write_commit_file;
+	use crate::sync::tests::{rename_file, write_commit_file};
 	use crate::sync::{
 		commit, get_commits_info, stage_add_file,
 		tests::repo_init_empty,
 	};
 	use crate::sync::{
-		diff_contains_file, filter_commit_by_search, LogFilterSearch,
-		LogFilterSearchOptions, RepoPath,
+		diff_contains_file, filter_commit_by_search, stage_add_all,
+		LogFilterSearch, LogFilterSearchOptions, RepoPath,
 	};
 	use pretty_assertions::assert_eq;
+	use std::sync::{Arc, RwLock};
 	use std::{fs::File, io::Write, path::Path};
 
 	#[test]
@@ -207,7 +208,8 @@ mod tests {
 
 		let _third_commit_id = commit(&repo_path, "commit3").unwrap();
 
-		let diff_contains_baz = diff_contains_file("baz".into());
+		let file_path = Arc::new(RwLock::new(String::from("baz")));
+		let diff_contains_baz = diff_contains_file(file_path);
 
 		let mut items = Vec::new();
 		let mut walker = LogWalker::new(&repo, 100)?
@@ -222,7 +224,8 @@ mod tests {
 
 		assert_eq!(items.len(), 0);
 
-		let diff_contains_bar = diff_contains_file("bar".into());
+		let file_path = Arc::new(RwLock::new(String::from("bar")));
+		let diff_contains_bar = diff_contains_file(file_path);
 
 		let mut items = Vec::new();
 		let mut walker = LogWalker::new(&repo, 100)?
@@ -280,4 +283,37 @@ mod tests {
 
 		assert_eq!(items.len(), 2);
 	}
+
+	#[test]
+	fn test_logwalker_with_filter_rename() {
+		let (td, repo) = repo_init_empty().unwrap();
+		let repo_path: RepoPath = td.path().into();
+
+		write_commit_file(&repo, "foo.txt", "foobar", "c1");
+		rename_file(&repo, "foo.txt", "bar.txt");
+		stage_add_all(
+			&repo_path,
+			"*",
+			Some(crate::sync::ShowUntrackedFilesConfig::All),
+		)
+		.unwrap();
+		let rename_commit = commit(&repo_path, "c2").unwrap();
+
+		write_commit_file(&repo, "bar.txt", "new content", "c3");
+
+		let file_path =
+			Arc::new(RwLock::new(String::from("bar.txt")));
+		let log_filter = diff_contains_file(file_path.clone());
+
+		let mut items = Vec::new();
+		let mut walker = LogWalker::new(&repo, 100)
+			.unwrap()
+			.filter(Some(log_filter));
+		walker.read(&mut items).unwrap();
+
+		assert_eq!(items.len(), 3);
+		assert_eq!(items[1], rename_commit);
+
+		assert_eq!(file_path.read().unwrap().as_str(), "foo.txt");
+	}
 }

asyncgit/src/sync/mod.rs

@@ -143,6 +143,13 @@ mod tests {
 		});
 	}
 
+	pub fn rename_file(repo: &Repository, old: &str, new: &str) {
+		let dir = repo.workdir().unwrap();
+		let old = dir.join(old);
+		let new = dir.join(new);
+		std::fs::rename(old, new).unwrap();
+	}
+
 	/// write, stage and commit a file
 	pub fn write_commit_file(
 		repo: &Repository,

asyncgit/src/sync/repository.rs

@@ -47,6 +47,11 @@ impl From<&str> for RepoPath {
 		Self::Path(PathBuf::from(p))
 	}
 }
+impl From<&Path> for RepoPath {
+	fn from(p: &Path) -> Self {
+		Self::Path(PathBuf::from(p))
+	}
+}
 
 pub fn repo(repo_path: &RepoPath) -> Result<Repository> {
 	let repo = Repository::open_ext(

src/components/file_revlog.rs

@@ -1,3 +1,5 @@
+use std::sync::{Arc, RwLock};
+
 use super::utils::logitems::ItemBatch;
 use super::{visibility_blocking, BlameFileOpen, InspectCommitOpen};
 use crate::keys::key_match;
@@ -116,7 +118,8 @@ impl FileRevlogComponent {
 	pub fn open(&mut self, open_request: FileRevOpen) -> Result<()> {
 		self.open_request = Some(open_request.clone());
 
-		let filter = diff_contains_file(open_request.file_path);
+		let file_name = Arc::new(RwLock::new(open_request.file_path));
+		let filter = diff_contains_file(file_name);
 		self.git_log = Some(AsyncLog::new(
 			self.repo_path.borrow().clone(),
 			&self.sender,