Refreshing had no way to say "scan only this drive": a user with three external
drives had to spin all of them up for every refresh, and switching a drive off
made the next refresh treat its whole library as deleted (rows pruned from the
memory cache and the SQLite cache, preview_url stripped on the next scroll).
Backend (py/services/model_scanner.py, py/config.py):
* ReconcileScope(roots, folder) + _reconcile_cache(scope=...): files inside the
scope reconcile normally, everything outside is neither re-read nor removed.
The folder half is plumbing for the sidebar entry in the next change.
* Path-level pruning guard: cached entries under a path this walk could not
read are kept and reported instead of removed. Sources: a configured root that
is not reachable (drive switched off while LM runs), a directory os.walk
failed to enter (permissions / I/O error / Windows junction to an offline
drive), and a known first-level symlink whose target is gone
(Config.iter_path_mappings()).
* The recorded folder list is unioned instead of replaced whenever the scan did
not verify every root, so a scoped scan cannot empty the sidebar.
* _reconcile_cache returns a summary (added / removed / repaired /
scanned_roots / skipped_roots / unavailable_paths / kept_unreachable),
exposed as ModelScanner.last_reconcile_summary, returned by
BaseModelService.scan_models() and broadcast in the completed WS payload.
* _root_display_labels(): set-aware labels ("G: loras", "usb/loras") grown
leftwards with real parent segments until unique, shared by the walk-progress
line and the roots API.
* GET /scan accepts repeated `roots` (400 for unknown roots, 400 combined with
full_rebuild=true); GET /roots gains root_details (label / reachable / cached
count) while `roots` stays a plain path list for existing callers.
* serve_preview: a 404 no longer clears the cached preview_url when the file's
own directory is unreachable - browsing the grid with a drive off used to
strip preview references from the persistent cache.
Frontend:
* Refresh ▾ gains a "Scan one folder" section listing the page's roots with
their cached counts; offline roots stay clickable and explain themselves; rows
are wired by delegation (new static/js/components/controls/ScanScopeMenu.js).
* A scoped scan reports "Scanned <root>: N new, M removed"; a scan that kept
entries reports "<N> models kept: <paths> not reachable".
* registerAPI() now injects the two cross-page passthroughs (fetchModelRoots and
an argument-forwarding refreshModels) so a page facade cannot drop them: the
first version rendered an empty menu and would have run a full refresh.
* createToastElement whitelists toast types, so a wrong `type` argument degrades
to the info style instead of rendering an unstyled box.
Verified in a sandbox instance with three roots: a scoped scan walks only the
requested root (progress roots=0/1, 240 files); a full refresh with one root
offline reports kept_unreachable=60 and leaves all 420 models cached; /roots
reports the offline root with its cached count. 3699 passed, 7 skipped;
frontend 1488 passed (148 files); vue widgets 96 passed.
A regular Refresh walked every configured root sequentially, so a full
25 TB drive delayed the roots behind it, and the dialog sat on "Checking
for changes..." at 0 % for the whole walk with no way to tell it was
working. On a cold external drive the walk itself dominates the cost, so
the fix is to overlap the drives and to show what the walk is doing.
Backend (py/services/model_scanner.py):
* Extract the per-root walk into the synchronous _walk_root_for_reconcile()
worker and merge its results on the event loop afterwards, in configured
root order: which business path wins a file reachable through several
roots must not depend on the order the workers happened to finish in.
* Group roots by device (_root_device_key: drive letter on Windows, st_dev
on POSIX) and run one worker per device. Roots sharing a device stay
sequential, so directory claims and the overlap dedup (#871, #1041) keep
their configured-order semantics; different devices run in parallel.
* Track walk progress per root (_ReconcileWalkTracker), weighted by each
root's cached entry count because the real file count is only known once
the walk ends. The bar splits into walk (0-50 %) and new-file (50-99 %)
phases so it never jumps backwards, and the walk broadcasts files seen,
active roots and the ETA counters.
* Replace the Windows case-insensitive fallback -- a scan of every cached
path per miss, i.e. O(files x cached) -- with a lazily built lower-cased
index (_CachedPathLookups, also now guarding the realpath alias index for
worker threads), and lift the os.name == "nt" gate into the module-level
_CASE_INSENSITIVE_PATHS so the branch is testable off Windows.
* Excluded-model membership is a set lookup instead of a list scan.
Frontend:
* render the walk phase as "Checking for changes... <roots> (N files)" with
the ETA, and reset the ETA tracker when the stage changes: the per-file
rate of counting files says nothing about processing them.
* add common.scanProgress.walkFiles; the other locales keep the sanctioned
[TODO: Translate] placeholder until the translation pass.
Verified: no-change reconcile over 10k files/500 dirs 101 ms and 10k/5000
dirs 230 ms (was 93/229 ms, within noise); a two-device sandbox walk runs
both roots concurrently, names them in the progress messages and finishes
with added=15, removed=0; 3665 passed, 7 skipped; frontend 1456 passed,
vue widgets 96 passed.
Broadcast typed scan_progress messages over /ws/fetch-progress from the
manual refresh/rebuild paths of ModelScanner and RecipeScanner, and
render percent, processed/total, current file name and an EMA-smoothed
ETA in the loading overlay. Hardcoded refresh strings move to i18n
(common.scanProgress); WS connection failure falls back to the previous
static loading behavior.
Will Miao