rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Avoid no-op unlink+link dances in incr comp

Browse Source
This commit is contained in:
Ben Kimock
2024-07-28 16:54:14 -04:00
parent 9af8985e05
commit cae7c76d50
6 changed files with 50 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
compiler/rustc_incremental/src/persist/work_product.rs
View File

@@ -3,7 +3,7 @@
//! [work products]: WorkProduct
use std::fs as std_fs;
use std::path::Path;
use std::path::{Path, PathBuf};
use rustc_data_structures::unord::UnordMap;
use rustc_fs_util::link_or_copy;
@@ -20,6 +20,7 @@ pub fn copy_cgu_workproduct_to_incr_comp_cache_dir(
sess: &Session,
cgu_name: &str,
files: &[(&'static str, &Path)],
known_links: &[PathBuf],
) -> Option<(WorkProductId, WorkProduct)> {
debug!(?cgu_name, ?files);
sess.opts.incremental.as_ref()?;
@@ -28,6 +29,10 @@ pub fn copy_cgu_workproduct_to_incr_comp_cache_dir(
for (ext, path) in files {
let file_name = format!("{cgu_name}.{ext}");
let path_in_incr_dir = in_incr_comp_dir_sess(sess, &file_name);
if known_links.contains(&path_in_incr_dir) {
let _ = saved_files.insert(ext.to_string(), file_name);
continue;
}
match link_or_copy(path, &path_in_incr_dir) {
Ok(_) => {
let _ = saved_files.insert(ext.to_string(), file_name);