Add AppData (#654)

* Add AppData

* fix amp and downgrade version number

* Update gala.appdata.xml.in

data/gala.appdata.xml.in

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2019 elementary, Inc. <contact@elementary.io> -->
+<component>
+  <id>io.elementary.gala</id>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0+</project_license>
+  <name>Multitasking &amp; Window Management</name>
+  <summary>A window &amp; compositing manager for Pantheon</summary>
+  <description>
+    <p>A window &amp; compositing manager based on libmutter and designed by elementary for use with Pantheon.</p>
+  </description>
+  <releases>
+    <release version="3.2.0" date="2019-12-09" urgency="medium">
+      <description>
+        <p>Improvements:</p>
+        <ul>
+          <li>Improve window shadows for legacy apps</li>
+          <li>Fix potential crash when taking screenshots</li>
+          <li>Fix notification position after changing DPI</li>
+          <li>Fix animations for moving and maximizing tiled windows</li>
+        </ul>
+      </description>
+    </release>
+  </releases>
+  <compulsory_for_desktop>Pantheon</compulsory_for_desktop>
+  <developer_name>elementary, Inc.</developer_name>
+  <url type="homepage">https://elementary.io</url>
+  <url type="bugtracker">https://github.com/elementary/gala/issues</url>
+</component>

data/meson.build

@@ -8,6 +8,15 @@ gala_gschema = configure_file(
 
 gala_gschema_compile = gnome.compile_schemas()
 
+i18n.merge_file(
+    input: 'gala.appdata.xml.in',
+    output: meson.project_name() + '.appdata.xml',
+    po_dir: join_paths(meson.source_root(), 'po'),
+    type: 'xml',
+    install: true,
+    install_dir: join_paths(get_option('datadir'), 'metainfo'),
+)
+
 i18n.merge_file(
 	input: 'gala-multitaskingview.desktop.in',
 	output: 'gala-multitaskingview.desktop',

meson.build

@@ -1,6 +1,6 @@
 project('gala',
 	'c', 'vala',
-	version: '0.3.1',
+	version: '3.2.0',
 	meson_version: '>= 0.42.0',
 	license: 'GPL3',
 )

po/POTFILES

@@ -1,5 +1,6 @@
 src/WindowManager.vala
 daemon/MenuDaemon.vala
+data/gala.appdata.xml.in
 data/gala-multitaskingview.desktop.in
 data/gala-other.desktop.in
 data/org.pantheon.desktop.gala.gschema.xml.in