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librustc_metadata::locator: Properly detect file type. #75548

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Merged
merged 1 commit into from
Aug 18, 2020
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librustc_metadata::locator: Properly detect file type. #75548

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14 changes: 10 additions & 4 deletions src/librustc_metadata/locator.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -685,13 +685,19 @@ impl<'a> CrateLocator<'a> {
&& file.ends_with(&self.target.options.dll_suffix)
{
// Make sure there's at most one rlib and at most one dylib.
let loc = fs::canonicalize(&loc).unwrap_or_else(|_| loc.clone());
// Note to take care and match against the non-canonicalized name:
// some systems save build artifacts into content-addressed stores
// that do not preserve extensions, and then link to them using
// e.g. symbolic links. If we canonicalize too early, we resolve
// the symlink, the file type is lost and we might treat rlibs and
// rmetas as dylibs.
let loc_canon = fs::canonicalize(&loc).unwrap_or_else(|_| loc.clone());
if loc.file_name().unwrap().to_str().unwrap().ends_with(".rlib") {
rlibs.insert(loc, PathKind::ExternFlag);
rlibs.insert(loc_canon, PathKind::ExternFlag);
} else if loc.file_name().unwrap().to_str().unwrap().ends_with(".rmeta") {
rmetas.insert(loc, PathKind::ExternFlag);
rmetas.insert(loc_canon, PathKind::ExternFlag);
} else {
dylibs.insert(loc, PathKind::ExternFlag);
dylibs.insert(loc_canon, PathKind::ExternFlag);
}
} else {
self.rejected_via_filename
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