Soulseek album-bundle (and any other release-staging path) was
importing every file with ``track_number=1`` because the staging
metadata reader used the auto-import-flavor filename extractor:
``extract_track_number_from_filename`` returns 1 when the basename
has no ``NN -`` prefix. That's the right default for the loose
auto-import flow (single file in, no upstream metadata to lean
on), but completely wrong for staging-cache reads:
- For an album-bundle download the user has authoritative track
numbers in the Spotify track list flowing through to
``track_info`` for each task.
- ``try_staging_match`` in ``core/downloads/staging.py`` was
meant to use those numbers when the staged file's own metadata
doesn't have them.
- But the staging cache populated ``track_number=1`` for every
untagged bare-title file (e.g. ``Cha-La Head-Cha-La.flac``), the
album-bundle resolution branch reads file-side first, sees 1,
and short-circuits the rest of the chain.
Fix:
- New ``extract_explicit_track_number`` in
``core/imports/filename.py`` — strict variant that returns
``0`` when no numeric prefix is visible. Docstring explicitly
contrasts with the legacy 1-defaulting helper so future
callers pick the right one.
- ``read_staging_file_metadata`` in ``core/imports/staging.py``
now uses the strict extractor, so the staging file dict
carries ``track_number=0`` ("unknown") instead of ``1`` for
untagged bare-title files.
- The legacy ``extract_track_number_from_filename`` keeps its
1-default behavior so auto-import callers + the post-process
template fallbacks are unchanged; it's now implemented in
terms of the strict variant.
- Tag-side parsing also tightened to require ``> 0`` before
overriding the filename-derived value.
3 new tests pin the contracts:
- ``test_extract_explicit_track_number_returns_zero_when_no_prefix``
- ``test_read_staging_file_metadata_returns_zero_track_when_unknown``
- existing ``test_extract_track_number_from_filename_handles_common_patterns``
now explicitly comments why bare filenames keep returning 1.
758 tests across imports + downloads + repair + staging-provenance
suites green. WHATS_NEW entry added under 2.6.3.
Reported against an album-bundle download of Ryoto's
"Cha-La Head-Cha-La" where slskd staged 15 untagged FLAC files
named after the song titles only.
- Move import flow modules into a dedicated package
- Update app and test imports to the new namespace
- Group the import-focused tests under tests/imports
