pub fn cached_entry(
root: &Path,
module_id: &str,
version: &str,
) -> Option<CachedArtifact>Expand description
Look up a cached, verified artifact for module_id/version — keyed
by VERSION ALONE (D-08): a hit never needs the feed, which is what
makes SC-3 (no network on a repeat fetch) and SC-4 (offline-with-cache
succeeds) possible. Accepts only filenames that strip to EXACTLY
<version>- + 64 lowercase hex + .modl — no regex, just
strip_prefix/strip_suffix plus a length + hex-digit check, which
also disambiguates a prerelease version whose own string contains a
hyphen (e.g. 2.3.4-rc1 never satisfies the fixed-length digest
check when only 2.3.4 was requested).
A missing cache directory is None, never an error. Selection is
DETERMINISTIC — never “whatever read_dir yielded first”: the newest
entry by modified time wins, ties broken by filename order. One
version can legitimately own two entries once 15-02’s
accept-the-change override persists a second digest alongside the
first.