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ComfyAssets-ComfyUI_PromptM…/database
Vito f68e92b3b6 feat(system): maintenance backend (#313)
* feat(maintenance): reviewed, read-only maintenance plans

POST /prompt_manager/maintenance/preview reviews duplicate_prompts,
optimize, unused_components or missing_links on its own mode=ro snapshot
and answers a Plan (scope, protected reasons, backup policy, media, at most
50 detail rows). The fingerprint, targets and judged sources stay in a
server-side PlanStore under a single-use token (15 min, 8 plans, 16 MiB,
never truncated; a restart forgets them), bound to the database it read.

The previews reuse the legacy queries: duplicate groups and the merge are
shared with cleanup_duplicates, ORPHANED_PROMPTS_SQL is built from the
#239 protection predicates the plan reports, and missing links are judged
by the health check's link_states. Legacy /maintenance keeps its shape;
vacuum now reports success:false when VACUUM fails, and
cleanup_orphaned_images skips links under unavailable sources.

* feat(maintenance): apply reviewed plans as Activity jobs

POST /prompt_manager/maintenance/apply {token} starts a maintenance job
(records admission, not cancellable, groups changed/protected/errors).
The token is consumed on the loop turn the job starts: a second apply is
409 plan-used naming the job, a busy refusal keeps the token, an unknown
or expired one is 410 plan-expired, and a restore since the review is
409 storage-changed.

With the safety backup policy on (maintenance.safety_backup, default true,
saved through the settings route with the revision), the job first writes
a backup into a temp file beside the database, makes it a standalone
rollback-journal file, verifies it, fsyncs it and renames it onto a unique
<db>.backup_<YYYYmmdd_HHMMSS_ffffff>[_n] name; any failure leaves no file
and nothing changed. The apply then rechecks the reviewed fingerprint
inside BEGIN IMMEDIATE (plan-changed writes nothing), deletes in batches of
400 ids, counts changed and protected records, logs the backup by name
only and prunes old safety backups. With the policy off the log and the
status line say "No safety backup".

* feat(maintenance): find and remove duplicate files through Activity

Duplicate image files move onto the job registry:

- POST /prompt_manager/jobs/duplicates finds content-identical media
  files over every effective source as a cancellable read job
  ("Find duplicate image files", group groups_found); the server holds
  the groups per job and GET /prompt_manager/maintenance/duplicates/{id}
  pages them ten at a time.
- The duplicate_files preview binds a removal to the reviewed keepers.
  Every keeper and removal is checked again: containment as text before
  any filesystem access, then not a link, still inside its source, same
  size and hash. The plan lists the database links that move.
- Apply runs duplicate_cleanup (records, not cancellable): the promised
  safety backup, then per file a recheck, the unlink with every handle
  closed and its thumbnail. A changed file is kept, the first failed
  unlink stops the job with a coded message (never the OS text), and only
  removed files have their image links and favorites moved to the kept
  copy.
- The legacy scan, stream, status and delete routes keep their shapes on
  the same registry kinds; the hashing, grouping and thumbnail removal
  are shared with them.

Coordinator rulings on Tasks 15-16:

- Safety backups share the restore pool of 10 `<db>.backup_*` files; the
  pool is now also pruned when an apply fails after its backup.
- Plans report the safety backup's size and the free disk space, and
  apply refuses up front (507 insufficient-space) when the backup or
  VACUUM does not fit, so no job fails halfway for space.

* fix(maintenance): never remove the kept copy; move records before unlink

Final review of #313:

- C1: the duplicate find tells files apart by (st_dev, st_ino), so a
  source listed twice, a symlinked source inside another and a hardlink
  are one file. The preview and the job refuse a removal that
  os.path.samestat matches with its kept copy.
- I1: each file's records move to its verified kept copy in one short
  transaction before that file is unlinked; a failed move deletes
  nothing and a failed unlink leaves the records on the identical kept
  copy. The status line counts files removed and not removed.
- I2: links are looked up under every spelling of the source (the real
  path, the configured and monitored folders, ComfyUI's output).
- I5: image tags join the kept copy as their union and the removed
  copy's pending, undecided Needs review items are settled; the plan
  says so.
- I3: the VACUUM disk check measures SQLite's real temporary folder.
- M1: the token is looked at again with no await before the job starts.
- M2: the backup decision is made once and handed to the job.
- M3: backups are linked into place; startup sweeps interrupted temps.
- M4: Optimize runs alone (new "exclusive" admission) and its plan says
  the database is locked while VACUUM runs.
- M5: the reviewed duplicate merge is strict: collisions and Library
  titles are protected, and errors roll back. The legacy cleanup is
  unchanged.
- M7: 2,000 keep entries within a 1 MiB body. M8: event waits in tests.
- M9: the preview binds files by size, mtime and inode without hashing;
  the job hashes right before each unlink.

* fix(maintenance): protect one file reached through two mounts

Re-review of #313, round 2:

- R1: a removal on another device than its kept copy, with the same
  size and mtimes within 2 s, is protected when its inode is equal or its
  path within its source is the same ("May be the same file reached
  through another mount or share"), in the preview and again right before
  each unlink. The job holds the kept copy open during the unlink, so on
  Windows deleting the kept copy itself through another path fails.
- R2: a file's spellings are found by containment: every configured,
  monitored, ComfyUI-output or listed folder whose stat identity is a
  folder above the file. Parent spellings of nested sources and case
  variants match; favorites move under every listed root holding the
  file. Lookups stay index searches.
- m1: a failed unlink's row says the links now name the kept copy.
- m2: a volume with no file ids reads "Can't confirm this is a separate
  file on this drive".

* fix(maintenance): stat duplicate candidates with os.stat

Python 3.10's Path.stat uses the os.stat bound when pathlib was imported,
so the find and the per-file checks could see different stat calls. The
find now calls os.stat directly, like every other check; the mount tests
failed on py3.10 only.

* fix(maintenance): recheck the kept copy right before each unlink

Re-review 2 of #313:

- n1: the cross-mount guard also matches when one path within its source
  ends with the other on a whole folder name (sources listed at different
  depths, e.g. 2024/x.png and x.png on a FUSE or noserverino mount).
- n2: after a file's records move and right before its unlink, the held
  kept copy must still be the file at its path (fstat of the hold against
  os.stat) and the cross-mount guard must still hold; otherwise the file
  is kept, its records move back to it, and it counts as not removed.

* test(maintenance): the kept-copy race tests hold on Windows

On Windows the removal job holds the kept copy open without
FILE_SHARE_DELETE, so the tests' attempt to delete or replace it during
the record move is refused. The tests now assert that native outcome:
the kept copy stays and the removal goes ahead.

* fix(maintenance): restore a backup of any size the disk has room for

The legacy restore refused the maintainer's own 1.6 GB safety backup with
"File too large. Maximum size is 100MB", a fixed cap since #153. Free
disk space now decides: the upload, its staged copy and the swap must fit,
under a 64 GiB ceiling. A request with a Content-Length that does not fit
is refused before anything is written, one without as soon as its running
size does not, with 507 insufficient-space and a message without paths.
The upload still streams and its temp file is removed on every path.
2026-10-24 05:28:44 -07:00
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