Swap Discogs genres and styles

[snejus]

discogs: Swap genre and style field mapping

Fixes #6390

Fixes the semantic mismatch between Discogs' taxonomy and beets' fields. In Discogs, genres are broad (e.g. "Electronic") and styles are specific (e.g. "Techno"). Previously, beets stored them the wrong way around.

What changed

In get_album_info, the source fields are swapped:

• genres (beets) now reads from Discogs styles — the specific values
• style (beets) now reads from Discogs genres — the broader values

The append_style_genre config option retains its original intent: append broader style values to genres when enabled. Only the data source for each field changed, not the logic.

[Copilot]

Pull request overview

PR swap Discogs genre/style mapping so beets fields match Discogs meaning: Discogs genres are broad, Discogs styles are specific.

Changes:

• In Discogs plugin, read beets genres from Discogs styles, and beets style from Discogs genres.
• Update Discogs plugin tests to cover the swapped mapping.
• Update Discogs plugin docs + changelog entry for new mapping.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

File	Description
beetsplug/discogs/__init__.py	Swap Discogs genres/styles inputs when building AlbumInfo.style and AlbumInfo.genres.
test/plugins/test_discogs.py	Adjust release fixture + assertions for swapped mapping; rename one test.
docs/plugins/discogs.rst	Update append_style_genre + separator docs to describe new semantics.
docs/changelog.rst	Add changelog entry describing the Discogs mapping change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.06%. Comparing base (131768b) to head (1de757f).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6478   +/-   ##
=======================================
  Coverage   70.06%   70.06%           
=======================================
  Files         147      147           
  Lines       18562    18562           
  Branches     3026     3026           
=======================================
  Hits        13005    13005           
  Misses       4924     4924           
  Partials      633      633           

Files with missing lines	Coverage Δ
beetsplug/discogs/__init__.py	67.28% <100.00%> (ø)

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

[JOJ0]

those tiny copilot suggestions seem valid, other than that LGTM

[snejus]

those tiny copilot suggestions seem valid

I'm not sure about this - there is inherent confusion because we are swapping genres and styles around in the incoming Discogs data.

I doubt that this is a good suggestion

😁

[JOJ0]

those tiny copilot suggestions seem valid

I'm not sure about this - there is inherent confusion because we are swapping genres and styles around in the incoming Discogs data.

I doubt that this is a good suggestion

😁

Brrr yeah all this is very confusing. But this suggested sentence is the more confusing one, I agree

I try to give all these sentences another look, maybe can be even more clarified. hopefully find time tomorrow (other plans)