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Reduce allocations in fs::copy_files_except_ext #2355

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merged 1 commit into from
Apr 8, 2024
Merged

Reduce allocations in fs::copy_files_except_ext #2355

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71 changes: 19 additions & 52 deletions src/utils/fs.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -72,14 +72,12 @@ pub fn create_file(path: &Path) -> Result<File> {

/// Removes all the content of a directory but not the directory itself
pub fn remove_dir_content(dir: &Path) -> Result<()> {
for item in fs::read_dir(dir)? {
if let Ok(item) = item {
let item = item.path();
if item.is_dir() {
fs::remove_dir_all(item)?;
} else {
fs::remove_file(item)?;
}
for item in fs::read_dir(dir)?.flatten() {
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Btw, this is off-topic and just resolves a clippy warning.

let item = item.path();
if item.is_dir() {
fs::remove_dir_all(item)?;
} else {
fs::remove_file(item)?;
}
}
Ok(())
Expand Down Expand Up @@ -108,72 +106,41 @@ pub fn copy_files_except_ext(
}

for entry in fs::read_dir(from)? {
let entry = entry?;
let entry = entry?.path();
let metadata = entry
.path()
.metadata()
.with_context(|| format!("Failed to read {:?}", entry.path()))?;
.with_context(|| format!("Failed to read {entry:?}"))?;

let entry_file_name = entry.file_name().unwrap();
let target_file_path = to.join(entry_file_name);

// If the entry is a dir and the recursive option is enabled, call itself
if metadata.is_dir() && recursive {
if entry.path() == to.to_path_buf() {
if entry == to.as_os_str() {
continue;
}

if let Some(avoid) = avoid_dir {
if entry.path() == *avoid {
if entry == *avoid {
continue;
}
}

// check if output dir already exists
if !to.join(entry.file_name()).exists() {
fs::create_dir(&to.join(entry.file_name()))?;
if !target_file_path.exists() {
fs::create_dir(&target_file_path)?;
}

copy_files_except_ext(
&from.join(entry.file_name()),
&to.join(entry.file_name()),
true,
avoid_dir,
ext_blacklist,
)?;
copy_files_except_ext(&entry, &target_file_path, true, avoid_dir, ext_blacklist)?;
} else if metadata.is_file() {
// Check if it is in the blacklist
if let Some(ext) = entry.path().extension() {
if let Some(ext) = entry.extension() {
if ext_blacklist.contains(&ext.to_str().unwrap()) {
continue;
}
}
debug!(
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I removed this trace as it did not really add value, in my opinion. The target file path is traced also below.

"creating path for file: {:?}",
&to.join(
entry
.path()
.file_name()
.expect("a file should have a file name...")
)
);

debug!(
"Copying {:?} to {:?}",
entry.path(),
&to.join(
entry
.path()
.file_name()
.expect("a file should have a file name...")
)
);
copy(
entry.path(),
&to.join(
entry
.path()
.file_name()
.expect("a file should have a file name..."),
),
)?;
debug!("Copying {entry:?} to {target_file_path:?}");
copy(&entry, &target_file_path)?;
}
}
Ok(())
Expand Down