metainfo: modernize, organize, add missing tags (#190)

data/meson.build

@@ -1,8 +1,8 @@
 i18n.merge_file(
-    input: 'wallpapers.appdata.xml.in',
-    output: meson.project_name() + '.appdata.xml',
-    po_dir: join_paths(meson.source_root(), 'po'),
+    input: 'wallpapers.metainfo.xml.in',
+    output: meson.project_name() + '.metainfo.xml',
+    po_dir: meson.source_root() / 'po',
     type: 'xml',
     install: true,
-    install_dir: join_paths(get_option('datadir'), 'metainfo'),
+    install_dir: get_option('datadir') / 'metainfo',
 )

data/wallpapers.appdata.xml.in → data/wallpapers.metainfo.xml.in

@@ -2,11 +2,26 @@
 <!-- Copyright 2019-2022 elementary, Inc. <[email protected]> -->
 <component>
   <id>io.elementary.wallpapers</id>
+  <translation type="gettext">io.elementary.wallpapers</translation>
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0+</project_license>
+
+  <icon type="stock">preferences-desktop-wallpaper</icon>
   <name>elementary Wallpapers</name>
   <summary>Curated wallpapers for elementary OS</summary>
-  <icon type="stock">preferences-desktop-wallpaper</icon>
+
+  <content_rating type="oars-1.1" />
+
+  <url type="homepage">https://elementary.io/</url>
+  <url type="bugtracker">https://github.com/elementary/wallpapers/issues</url>
+  <url type="donation">https://elementary.io/get-involved#funding</url>
+  <url type="translate">https://l10n.elementary.io/engage/desktop/</url>
+
+  <developer id="org.elementaryos">
+    <name>elementary, Inc.</name>
+  </developer>
+  <project_group>elementary</project_group>
+  <update_contact>contact_at_elementary.io</update_contact>
 
   <releases>
     <release version="7.0.0" date="2022-01-04" urgency="medium">
@@ -25,6 +40,7 @@
         </ul>
       </description>
     </release>
+
     <release version="6.0.0" date="2021-07-13" urgency="medium">
       <description>
         <ul>
@@ -34,6 +50,7 @@
         </ul>
       </description>
     </release>
+
     <release version="5.5.0" date="2019-11-26" urgency="medium">
       <description>
         <ul>
@@ -42,11 +59,4 @@
       </description>
     </release>
   </releases>
-  <content_rating type="oars-1.1" />
-  <translation type="gettext">io.elementary.wallpapers</translation>
-  <developer id="org.elementaryos">
-    <name>elementary, Inc.</name>
-  </developer>
-  <url type="homepage">https://elementary.io</url>
-  <url type="bugtracker">https://github.com/elementary/wallpapers/issues</url>
 ​</component>

po/POTFILES

@@ -1 +1 @@
-data/wallpapers.appdata.xml.in
+data/wallpapers.metainfo.xml.in