beets: Run tests for external plugins

In order to run the tests for the external plugins of beets, we need to
have beets itself as a dependency. So in order to do that, we now pass
beets without plugins and tests to the nativeBuildInputs of the plugins
so that we can run them.

As soon as the plugins are built they become part of the final beets,
which also has tests enabled, so disabling the tests for beets
derivation that is used for external plugin tests is a non-issue here
because they're going to be executed anyway.

Enabling tests for the alternatives plugin is pretty straightforward,
but in order to run tests for the copyartifacts plugin, we need to bump
the source code to the latest Git master.

The reason for this is that the version that was in use until now
required to have the beets source directory alongside of the
copyartifacts source code, but we already have beets available as a
normal dependency.

Updating copyartifacts to latest master largely consists of unit test
changes and a few Python 3 compatibility changes. However, one change
has the biggest stat, which is
sbarakat/beets-copyartifacts@1a0c281da0be7251f414397960a83d60dc3a1520.

Fortunately, the last change is just moving the implementation to a
newer API from upstream beets and by the looks of the implementation it
seems to break support for moving files. However, reverting this commit
also reveals that moving files was already broken before, so it wouldn't
matter much whether we have this version bump or not.

Tested with the following command:

nix-build -E '(import ./. {}).beets.override {
  enableAlternatives = true;
  enableCopyArtifacts = true;
}'

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Cc: @domenkozar, @pjones, @Profpatsch, @michalrus

1 files changed, 28 insertions, 16 deletions

diff --git a/pkgs/tools/audio/beets/default.nix b/pkgs/tools/audio/beets/default.nix
index ff033e62a8b..7e9d0ff9d86 100644
--- a/pkgs/tools/audio/beets/default.nix
+++ b/pkgs/tools/audio/beets/default.nix
@@ -1,6 +1,9 @@
 { stdenv, fetchFromGitHub, writeScript, glibcLocales, diffPlugins
 , pythonPackages, imagemagick, gobjectIntrospection, gst_all_1
 
+# Attributes needed for tests of the external plugins
+, callPackage, beets
+
 , enableAcousticbrainz ? true
 , enableAcoustid       ? true
 , enableBadfiles       ? true, flac ? null, mp3val ? null
@@ -77,6 +80,19 @@ let
   testShell = "${bashInteractive}/bin/bash --norc";
   completion = "${bash-completion}/share/bash-completion/bash_completion";
 
+  # This is a stripped down beets for testing of the external plugins.
+  externalTestArgs.beets = (beets.override {
+    enableAlternatives = false;
+    enableCopyArtifacts = false;
+  }).overrideAttrs (stdenv.lib.const {
+    doInstallCheck = false;
+  });
+
+  plugins = {
+    alternatives = callPackage ./alternatives-plugin.nix externalTestArgs;
+    copyartifacts = callPackage ./copyartifacts-plugin.nix externalTestArgs;
+  };
+
 in pythonPackages.buildPythonApplication rec {
   name = "beets-${version}";
   version = "1.4.5";
@@ -101,26 +117,22 @@ in pythonPackages.buildPythonApplication rec {
     pythonPackages.gst-python
     pythonPackages.pygobject3
     gobjectIntrospection
-  ] ++ optional enableAcoustid     pythonPackages.pyacoustid
+  ] ++ optional enableAcoustid      pythonPackages.pyacoustid
     ++ optional (enableFetchart
               || enableEmbyupdate
               || enableKodiupdate
               || enableAcousticbrainz)
-                                   pythonPackages.requests
-    ++ optional enableConvert      ffmpeg
-    ++ optional enableDiscogs      pythonPackages.discogs_client
-    ++ optional enableGmusic       pythonPackages.gmusicapi
-    ++ optional enableKeyfinder    keyfinder-cli
-    ++ optional enableLastfm       pythonPackages.pylast
-    ++ optional enableMpd          pythonPackages.mpd2
-    ++ optional enableThumbnails   pythonPackages.pyxdg
-    ++ optional enableWeb          pythonPackages.flask
-    ++ optional enableAlternatives (import ./alternatives-plugin.nix {
-      inherit stdenv pythonPackages fetchFromGitHub;
-    })
-    ++ optional enableCopyArtifacts (import ./copyartifacts-plugin.nix {
-      inherit stdenv pythonPackages fetchFromGitHub;
-    });
+                                    pythonPackages.requests
+    ++ optional enableConvert       ffmpeg
+    ++ optional enableDiscogs       pythonPackages.discogs_client
+    ++ optional enableGmusic        pythonPackages.gmusicapi
+    ++ optional enableKeyfinder     keyfinder-cli
+    ++ optional enableLastfm        pythonPackages.pylast
+    ++ optional enableMpd           pythonPackages.mpd2
+    ++ optional enableThumbnails    pythonPackages.pyxdg
+    ++ optional enableWeb           pythonPackages.flask
+    ++ optional enableAlternatives  plugins.alternatives
+    ++ optional enableCopyArtifacts plugins.copyartifacts;
 
   buildInputs = with pythonPackages; [
     beautifulsoup4