Shared helper the upcoming torrent and usenet download plugins
both compose against. Narrow surface — no matching, no tagging,
no library import. Just walks audio files and extracts archives
when needed.
Why a separate module: usenet downloaders (SABnzbd, NZBGet)
already auto-extract by default, and Lidarr's import pipeline
extracts before SoulSync sees the files. The only client that
sometimes leaves an archive behind is a torrent client when the
album was packed as a .rar — most music torrents ship loose but
not all. Centralising the walk + extract logic means both new
plugins can do the same thing, and a future direct-archive source
(zip download from a private site, etc.) plugs in for free.
- core/archive_pipeline.py:
- AUDIO_EXTENSIONS / ARCHIVE_EXTENSIONS constants (audio set
matches core/imports/file_ops.py quality_tiers).
- is_archive(path) handles compound extensions (.tar.gz etc).
- walk_audio_files(directory) — recursive, case-insensitive.
- find_archives_in_dir(directory) — top-level only (don't
surprise-extract sample / proof folders inside a torrent).
- extract_archive(archive_path, extract_to=None) — handles
.zip, .tar variants, .rar (optional rarfile dep), .7z
(optional py7zr dep). Optional deps warn-and-skip if absent.
- extract_all_in_dir + collect_audio_after_extraction — the
one-shot helpers the download plugins call after a download
completes.
- Path-traversal protection: every archive member's resolved
path must stay inside the destination — first violator aborts
the extract without writing anything. Applies to zip, tar,
and rar.
- tests/test_archive_pipeline.py: 21 tests covering the walker
(nested dirs, case-insensitive, ignores non-audio), archive
detection (compound extensions, missing files), zip extraction
+ path-traversal rejection, tar.gz + tar path-traversal,
multi-archive directory, mixed-loose-and-archived collection.
