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working_copy: return Merge<Option<TreeValue>> over channel

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When writing tree-level conflicts, we won't pass `TreeValue::Conflict`
over the `tree_entries` channel. Instead, we're going to pass possibly
unresolved `Merge<Option<TreeValue>>` instances. This commit prepares
for that by changing the type even though we'll only pass
`Merge::normal()` over the channel at this point.

I did this partly to see what the performance impact is. I tested that
by touching all files in the git.git repo to force the trees (and
files) to be rewritten. There was no measurable impact at all
(best-of-10 time was 2.44 s before and 2.40 s after, but I assume that
was a fluke).
This commit is contained in:
Martin von Zweigbergk 2023-08-11 20:01:30 -07:00 committed by Martin von Zweigbergk
parent 6c5d6d7e39
commit 03f00bbf30
1 changed files with 20 additions and 13 deletions
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33
lib/src/working_copy.rs
View file

@ -51,6 +51,7 @@ use crate::lock::FileLock;
use crate::matchers::{
DifferenceMatcher, EverythingMatcher, IntersectionMatcher, Matcher, PrefixMatcher,
};
use crate::merge::Merge;
use crate::op_store::{OperationId, WorkspaceId};
use crate::repo_path::{FsPathParseError, RepoPath, RepoPathComponent, RepoPathJoin};
use crate::store::Store;
@ -673,8 +674,15 @@ impl TreeState {
.collect()
});
trace_span!("process tree entries").in_scope(|| {
while let Ok((path, tree_value)) = tree_entries_rx.recv() {
tree_builder.set(path, tree_value);
while let Ok((path, tree_values)) = tree_entries_rx.recv() {
match tree_values.into_resolved() {
Ok(tree_value) => {
tree_builder.set(path, tree_value.unwrap());
}
Err(_) => {
todo!()
}
}
}
});
trace_span!("process file states").in_scope(|| {
@ -718,7 +726,7 @@ impl TreeState {
&self,
matcher: &dyn Matcher,
current_tree: &Tree,
tree_entries_tx: Sender<(RepoPath, TreeValue)>,
tree_entries_tx: Sender<(RepoPath, Merge<Option<TreeValue>>)>,
file_states_tx: Sender<(RepoPath, FileState)>,
present_files_tx: Sender<RepoPath>,
directory_to_visit: DirectoryToVisit,
@ -928,7 +936,7 @@ impl TreeState {
maybe_current_file_state: Option<&FileState>,
current_tree: &Tree,
new_file_state: &FileState,
) -> Result<Option<TreeValue>, SnapshotError> {
) -> Result<Option<Merge<Option<TreeValue>>>, SnapshotError> {
let clean = match maybe_current_file_state {
None => {
// untracked
@ -950,19 +958,18 @@ impl TreeState {
Ok(Some(new_tree_value))
}
}
fn write_path_to_store(
&self,
repo_path: &RepoPath,
disk_path: &Path,
current_tree_value: Option<TreeValue>,
file_type: FileType,
) -> Result<TreeValue, SnapshotError> {
) -> Result<Merge<Option<TreeValue>>, SnapshotError> {
let executable = match file_type {
FileType::Normal { executable } => executable,
FileType::Symlink => {
let id = self.write_symlink_to_store(repo_path, disk_path)?;
return Ok(TreeValue::Symlink(id));
return Ok(Merge::normal(TreeValue::Symlink(id)));
}
FileType::GitSubmodule => panic!("git submodule cannot be written to store"),
};
@ -989,24 +996,24 @@ impl TreeState {
let () = executable; // use the variable
false
};
Ok(TreeValue::File {
Ok(Merge::normal(TreeValue::File {
id: file_id.unwrap(),
executable,
})
}))
}
Err(new_file_ids) => {
if new_file_ids != old_file_ids {
let new_conflict = conflict.with_new_file_ids(&new_file_ids);
let new_conflict_id =
self.store.write_conflict(repo_path, &new_conflict)?;
Ok(TreeValue::Conflict(new_conflict_id))
Ok(Merge::normal(TreeValue::Conflict(new_conflict_id)))
} else {
Ok(TreeValue::Conflict(conflict_id.clone()))
Ok(Merge::normal(TreeValue::Conflict(conflict_id.clone())))
}
}
}
} else {
Ok(TreeValue::Conflict(conflict_id.clone()))
Ok(Merge::normal(TreeValue::Conflict(conflict_id.clone())))
}
} else {
let id = self.write_file_to_store(repo_path, disk_path)?;
@ -1020,7 +1027,7 @@ impl TreeState {
false
}
};
Ok(TreeValue::File { id, executable })
Ok(Merge::normal(TreeValue::File { id, executable }))
}
}