oscar: Set up beets configuration

Eventually, I want to get the subsonicupdate plugin working, but that'll
require credentials, and I don't want those to be committed in my config
here.

oscar/configuration.nix

@@ -145,7 +145,6 @@
       qgis
 
       # command line applications
-      beets
       iperf
       units
 
@@ -252,6 +251,21 @@
 #       };
     };
 
+    programs.beets = {
+      enable = true;
+      settings = {
+        directory = "~/nas/chandler/public/media/music";
+        library = "~/nas/chandler/public/media/music/beets.db";
+        plugins = [
+          "fetchart"
+          # "lyrics"
+          # "subsonicupdate" # TODO
+          "mbsubmit"
+          "edit"
+        ];
+      };
+    };
+
     programs.chromium = {
       enable = true;
       extensions = [