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Simplify up_to_date to call metadata once. #80757

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Simplify up_to_date to call metadata once. #80757

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9 changes: 5 additions & 4 deletions src/build_helper/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -172,10 +172,11 @@ pub fn mtime(path: &Path) -> SystemTime {
///
/// Uses last-modified time checks to verify this.
pub fn up_to_date(src: &Path, dst: &Path) -> bool {
if !dst.exists() {
return false;
}
let threshold = mtime(dst);
let dst_meta = match fs::metadata(dst) {
Ok(meta) => meta,
Err(_) => return false,
};
let threshold = dst_meta.modified().unwrap_or(UNIX_EPOCH);
let meta = match fs::metadata(src) {
Ok(meta) => meta,
Err(e) => panic!("source {:?} failed to get metadata: {}", src, e),
Expand Down