Offline re-tag of artist/title from the artist folder + filename: strips
(Official Video)/(Lyrics)-style decorations and trailing [id], and treats an
'Artist - Title' filename as authoritative (recovering the real artist for
music videos filed under a channel name). Overwrites artist/title only; leaves
album/year. Honors --dry-run.
Refactors the source-folder walk into _iter_source_files, shared by --repair
and --retag-from-path.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
--repair was clobbering good tags and erroring on real libraries:
- Validate the parsed id per source (YouTube 11-char, SoundCloud numeric) so
junk ids from bracketed descriptors ([Official Video]) are skipped, not queried.
- Skip files whose source returns no real music metadata (no album/year, e.g.
music videos) instead of overwriting clean tags with channel/decorated titles.
- Year from release info only (sane 1000-2100), never upload_date (which gave
wrong years for old songs and bogus values like 6577).
- album/year are authoritative; artist/title are fill-missing-only (no clobber).
Also: download_single now uses the first artist for the folder (matching the
search/playlist paths) so single-URL downloads stop creating multi-artist dirs.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Walks <root>/<artist>/<source>/ (known yt-dlp source folders only; skips Lidarr
album dirs), re-queries each file's source by the [id] in its filename, and fixes
tags (album/year/artist/title) via mutagen. Honors --dry-run for preview. CLI-only
(not the REST API). Fixes downloads that landed with missing album / wrong year.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
