[grilo-plugins] tracker: Add album disc number mapping

[Bastien Nocera <hadess src gnome org>]

commit 0b7fece1e9ce8aa5c7f33ff3de30d031e2300b2a
Author: Marinus Schraal <mschraal scr gnome org>
Date:   Fri May 13 18:33:38 2016 +0200

    tracker: Add album disc number mapping
    
    Map nmm:musicAlbumDisc to GRL_METADATA_KEY_ALBUM_DISC_NUMBER.
    
    And require the current development version of grilo as well.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761869

 configure.ac                    |    2 +-
 src/tracker/grl-tracker-utils.c |    5 +++++
 2 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 113aa9c..32ec398 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,7 +93,7 @@ fi
 PKG_CHECK_MODULES([DEPS], glib-2.0 >= 2.44      \
                          gobject-2.0   \
                          gmodule-2.0   \
-                         ${GRL_NAME} >= 0.3.0)
+                         ${GRL_NAME} >= 0.3.1)
 
 GLIB_COMPILE_RESOURCES=`$PKG_CONFIG --variable glib_compile_resources gio-2.0`
 AC_SUBST(GLIB_COMPILE_RESOURCES)
diff --git a/src/tracker/grl-tracker-utils.c b/src/tracker/grl-tracker-utils.c
index fd3e438..a6c3216 100644
--- a/src/tracker/grl-tracker-utils.c
+++ b/src/tracker/grl-tracker-utils.c
@@ -204,6 +204,11 @@ grl_tracker_setup_key_mappings (void)
                       "nmm:albumTitle(nmm:musicAlbum(?urn))",
                       "audio");
 
+    insert_key_mapping (GRL_METADATA_KEY_ALBUM_DISC_NUMBER,
+                      NULL,
+                      "nmm:setNumber(nmm:musicAlbumDisc(?urn))",
+                      "audio");
+
   insert_key_mapping (GRL_METADATA_KEY_ARTIST,
                       NULL,
                       "nmm:artistName(nmm:performer(?urn))",