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fix: retry writing lockfile on failure (#24052)
Ran into this running the deno_graph ecosystem tests where many processes writing to the same path at the same time would cause an error.
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f5c239f377
commit
38ff9faff6
2 changed files with 29 additions and 4 deletions
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@ -8,7 +8,7 @@ use deno_runtime::deno_node::PackageJson;
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use crate::args::ConfigFile;
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use crate::cache;
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use crate::util::fs::atomic_write_file;
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use crate::util::fs::atomic_write_file_with_retries;
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use crate::Flags;
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use super::DenoSubcommand;
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@ -84,7 +84,7 @@ pub fn write_lockfile_if_has_changes(
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};
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// do an atomic write to reduce the chance of multiple deno
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// processes corrupting the file
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atomic_write_file(&lockfile.filename, bytes, cache::CACHE_PERM)
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atomic_write_file_with_retries(&lockfile.filename, bytes, cache::CACHE_PERM)
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.context("Failed writing lockfile.")?;
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lockfile.has_content_changed = false;
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Ok(())
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@ -32,6 +32,28 @@ use crate::util::progress_bar::ProgressBar;
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use crate::util::progress_bar::ProgressBarStyle;
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use crate::util::progress_bar::ProgressMessagePrompt;
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pub fn atomic_write_file_with_retries<T: AsRef<[u8]>>(
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file_path: &Path,
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data: T,
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mode: u32,
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) -> std::io::Result<()> {
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let mut count = 0;
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loop {
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match atomic_write_file(file_path, data.as_ref(), mode) {
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Ok(()) => return Ok(()),
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Err(err) => {
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if count >= 5 {
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// too many retries, return the error
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return Err(err);
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}
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count += 1;
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let sleep_ms = std::cmp::min(50, 10 * count);
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std::thread::sleep(std::time::Duration::from_millis(sleep_ms));
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}
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}
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}
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}
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/// Writes the file to the file system at a temporary path, then
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/// renames it to the destination in a single sys call in order
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/// to never leave the file system in a corrupted state.
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@ -50,8 +72,11 @@ pub fn atomic_write_file<T: AsRef<[u8]>>(
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mode: u32,
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) -> std::io::Result<()> {
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write_file(temp_file_path, data, mode)?;
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std::fs::rename(temp_file_path, file_path)?;
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Ok(())
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std::fs::rename(temp_file_path, file_path).map_err(|err| {
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// clean up the created temp file on error
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let _ = std::fs::remove_file(temp_file_path);
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err
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})
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}
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fn inner(file_path: &Path, data: &[u8], mode: u32) -> std::io::Result<()> {
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