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working_copy: collect code for updating update stats in one place

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I think it's a little easier to follow if we don't update the stats in
the large callback. It also reduces the risk of forgetting to update
the stats in some case (like in the exec-bit-optimization case I just
removed).
This commit is contained in:
Martin von Zweigbergk 2023-08-16 21:51:30 -07:00 committed by Martin von Zweigbergk
parent 2151fd8930
commit c65fcabdf8
1 changed files with 21 additions and 19 deletions
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40
lib/src/working_copy.rs
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@ -1222,17 +1222,15 @@ impl TreeState {
matcher: &dyn Matcher,
mut handle_error: impl FnMut(CheckoutError) -> Result<(), CheckoutError>,
) -> Result<CheckoutStats, CheckoutError> {
let mut stats = CheckoutStats {
updated_files: 0,
added_files: 0,
removed_files: 0,
};
let mut apply_diff = |path: RepoPath, diff: Diff<TreeValue>| -> Result<(), CheckoutError> {
let mut apply_diff = |path: RepoPath,
before: Option<TreeValue>,
after: Option<TreeValue>|
-> Result<(), CheckoutError> {
let disk_path = path.to_fs_path(&self.working_copy_path);
// TODO: Check that the file has not changed before overwriting/removing it.
match diff.into_options() {
(Some(_before), None) => {
match after {
None => {
fs::remove_file(&disk_path).ok();
let mut parent_dir = disk_path.parent().unwrap();
loop {
@ -1242,9 +1240,8 @@ impl TreeState {
parent_dir = parent_dir.parent().unwrap();
}
self.file_states.remove(&path);
stats.removed_files += 1;
}
(before, Some(after)) => {
Some(after) => {
if before.is_some() {
fs::remove_file(&disk_path).ok();
}
@ -1266,21 +1263,26 @@ impl TreeState {
}
};
self.file_states.insert(path, file_state);
if before.is_none() {
stats.added_files += 1;
} else {
stats.updated_files += 1;
}
}
(None, None) => {
unreachable!()
}
}
Ok(())
};
let mut stats = CheckoutStats {
updated_files: 0,
added_files: 0,
removed_files: 0,
};
for (path, diff) in old_tree.diff(new_tree, matcher) {
apply_diff(path, diff).or_else(&mut handle_error)?;
let (before, after) = diff.into_options();
if after.is_none() {
stats.removed_files += 1;
} else if before.is_none() {
stats.added_files += 1;
} else {
stats.updated_files += 1;
}
apply_diff(path, before, after).or_else(&mut handle_error)?;
}
Ok(stats)
}