From f5b20114b42f35513853041427d4ea263efa618e Mon Sep 17 00:00:00 2001
From: wisp3rwind <17089248+wisp3rwind@users.noreply.github.com>
Date: Fri, 5 May 2023 20:34:57 +0200
Subject: [PATCH] fetchart: revert a cleanup from 4774 that could break plugins

cf. @arogl's comment https://github.com/beetbox/beets/commit/254bb297c894c0323174012ff27500867416d02b#commitcomment-111922347

> Now that this has been merged, external plugins that add to the fetchart plugin now fail with:
>
> ```AttributeError: module 'beetsplug.fetchart' has no attribute 'SOURCES_ALL'``
---
 beetsplug/fetchart.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/beetsplug/fetchart.py b/beetsplug/fetchart.py
index 39b5a52d4..24368c86f 100644
--- a/beetsplug/fetchart.py
+++ b/beetsplug/fetchart.py
@@ -977,6 +977,12 @@ class Spotify(RemoteArtSource):
             return
 # Try each source in turn.
 
+# Note that SOURCES_ALL is redundant (and presently unused). However, we keep
+# it around nn order not break plugins that "register" (a.k.a. monkey-patch)
+# their own fetchart sources.
+SOURCES_ALL = ['filesystem', 'coverart', 'itunes', 'amazon', 'albumart',
+               'wikipedia', 'google', 'fanarttv', 'lastfm', 'spotify']
+
 ART_SOURCES = {
     'filesystem': FileSystem,
     'coverart': CoverArtArchive,