* Studio: fix the permanent GGUF "update available" on no-symlink caches
Without the symlink privilege (the default on Windows with Developer Mode
OFF), hf_hub_download MOVES the downloaded blob into snapshots/ instead of
symlinking it out of blobs/, so blobs/ is left empty and scan_cache_dir
reports blob_path = the snapshot file itself. Path(blob_path).name is then
the GGUF FILENAME, not the file's etag.
_repo_gguf_blob_map recorded that filename as the file's local blob hash, so
_variant_update_available_from_requirement's `remote_sha256 in local_set`
test could never match and every cached GGUF reported "update available"
forever. Re-downloading could not clear it: the same file is rewritten, still
with no blob.
Only treat Path(blob_path).name as a hash when the file really lives in the
cache's blobs/ dir; otherwise record a size identity so the file still appears
in the map (dropping it would make the update check read it as absent and
report the same phantom update). The comparison falls back to the remote
ExpectedFile.size only when the cached file carries no blob hash, so the
blob-hash path is unchanged wherever HF does produce blobs.
A remote requant that keeps the byte size identical is not detected in that
layout; re-hashing multi-GB GGUFs on the inventory hot path is the only
stricter option.
Fixes#7060
* Studio: match GGUF update checks by manifest sha256, closing the equal-size requant blind spot (#7060)
On a no-symlink cache (Windows without Developer Mode) blobs/ is empty, so the update check falls back to comparing byte size. A Studio download records each file's sha256 in its manifest, so feed that into the local identity set: the check can then match by hash and detect an equal-size requant. The size fallback now applies only when no real hash is present, so a manifest hash that differs is still reported as a genuine update. Adds regression tests.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Revert the manifest-sha256 identity merge; keep the size-identity fallback (#7060)
The download manifest is written before the transfer with the expected remote hashes, so it records download intent, not verified on-disk content, and completion is checked by size only. Merging those hashes into the local identity set could clear the update badge for an interrupted equal-size update that left the old bytes on disk. The accompanying all-size-identity gate also suppressed the size fallback whenever an older revision contributed a real blob hash, which re-showed a false update on mixed hash and size caches. Restoring the plain size-identity fallback keeps the fix without those regressions.
* Studio: don't delete no-symlink GGUFs during stale-variant reclaim (#7060)
On a no-symlink cache (Windows without Developer Mode) the downloaded file is moved into snapshots/ and scan_cache_dir reports its blob_path as that snapshot file, whose name is the filename, not an etag. reclaim_replaced_gguf_variant treated that name as a blob hash, which never matches the current hashes to keep, so it unlinked the freshly downloaded file. Only extract a deletable hash when the blob path is a real cache blob under the repo blobs directory, and keep any file we cannot identify; stale no-symlink revisions leak rather than risk removing the current file. Adds a regression test.
* Studio: anchor GGUF blob-hash detection to the repo cache blobs dir (#7060)
The inventory update check and the stale-variant reclaim both decide whether a scanned file is a real cache blob (name is the etag) or a moved no-symlink snapshot file (name is the filename). Both now share one _is_real_cache_blob helper that anchors to the repo cache blobs directory instead of matching any parent folder named blobs, so a repo that ships GGUFs under its own blobs subdir is no longer misread as the cache blob store. Threads repo_path through _repo_gguf_blob_map. Adds a regression test.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Studio: tighten comments in the GGUF update-check helpers (#7060)
Post-review comment pass: shorten the internal blob-identity and size-fallback docstrings. Comments only, no behavior change.
---------
Co-authored-by: Lee Jackson <130007945+Imagineer99@users.noreply.github.com>
Co-authored-by: Daniel Han <danielhanchen@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
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