[gnome-nibbles] Port to appstream-util

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 5d76c2fdc6b362d4f3e0ff637ca6f903119cc9fc
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Nov 24 18:06:23 2014 -0600

    Port to appstream-util

 configure.ac                      |    3 ++-
 data/Makefile.am                  |   15 ++++++++-------
 data/gnome-nibbles.appdata.xml.in |    1 +
 3 files changed, 11 insertions(+), 8 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 895d67f..bdc9046 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,6 +11,8 @@ AM_PROG_CC_C_O
 
 GLIB_GSETTINGS
 
+APPSTREAM_XML
+
 dnl ###########################################################################
 dnl Dependencies
 dnl ###########################################################################
@@ -29,7 +31,6 @@ PKG_CHECK_MODULES(GNOME_NIBBLES, [
   clutter-gtk-1.0 >= $CLUTTER_GTK_REQUIRED
 ])
 
-AC_PATH_PROG([APPDATA_VALIDATE], [appdata-validate], [/bin/true])
 AC_PATH_PROG([DESKTOP_FILE_VALIDATE], [desktop-file-validate], [/bin/true])
 
 dnl ###########################################################################
diff --git a/data/Makefile.am b/data/Makefile.am
index 05d5faa..687bc71 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -19,26 +19,27 @@ desktop_in_files = gnome-nibbles.desktop.in
 desktop_DATA = $(desktop_in_files:.desktop.in=.desktop)
 @INTLTOOL_DESKTOP_RULE@
 
-appdatadir = $(datadir)/appdata
-appdata_in_files = gnome-nibbles.appdata.xml.in
-appdata_DATA = $(appdata_in_files:.xml.in=.xml)
+appstream_in_files = gnome-nibbles.appdata.xml.in
+appstream_XML = $(appdata_in_files:.xml.in=.xml)
+ APPSTREAM_XML_RULES@
 @INTLTOOL_XML_RULE@
 
 man_MANS = gnome-nibbles.6
 
 EXTRA_DIST = \
-       $(appdata_in_files) \
+       $(appstream_in_files) \
        $(desktop_in_files) \
        $(sounds_DATA) \
        $(gsettings_SCHEMAS) \
        $(man_MANS)
 
 CLEANFILES = \
-       $(appdata_DATA) \
+       $(appstream_XML) \
        $(desktop_DATA)
 
-check-local: $(appdata_DATA) $(desktop_DATA)
-       $(APPDATA_VALIDATE) $(appdata_DATA)
+check-local: $(desktop_DATA)
        $(DESKTOP_FILE_VALIDATE) $(desktop_DATA)
 
+DISTCHECK_CONFIGURE_FLAGS = --enable-appdata-check
+
 -include $(top_srcdir)/git.mk
diff --git a/data/gnome-nibbles.appdata.xml.in b/data/gnome-nibbles.appdata.xml.in
index ab038bf..30626c4 100644
--- a/data/gnome-nibbles.appdata.xml.in
+++ b/data/gnome-nibbles.appdata.xml.in
@@ -5,6 +5,7 @@
  <metadata_license>CC0-1.0</metadata_license>
  <project_license>GPL-2.0+ and CC-BY-SA-3.0</project_license>
  <_name>GNOME Nibbles</_name>
+ <_summary>Guide a worm around a maze</_summary>
  <description>
   <_p>
    Control a worm in its quest to eat bonuses and become longer. Outmaneuver