Fix meson not installing the schemas file; create a post_install script

Author: donadigo

data/meson.build

@@ -20,6 +20,11 @@ i18n.merge_file(
     install_dir: join_paths(get_option('datadir'), 'applications')
 )
 
+install_data (
+    meson.project_name () + '.gschema.xml',
+    install_dir: join_paths (get_option ('datadir'), 'glib-2.0', 'schemas')
+)
+
 i18n.merge_file(
     input: meson.project_name() + '.appdata.xml',
     output: meson.project_name() + '.appdata.xml',

meson/post_install.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+import os
+import subprocess
+
+prefix = os.environ.get('MESON_INSTALL_PREFIX', '/usr/local')
+datadir = os.path.join(prefix, 'share')
+schemadir = os.path.join(os.environ['MESON_INSTALL_PREFIX'], 'share', 'glib-2.0', 'schemas')
+
+# Packaging tools define DESTDIR and this isn't needed for them
+if 'DESTDIR' not in os.environ:
+    print('Updating icon cache...')
+    icon_cache_dir = os.path.join(datadir, 'icons', 'hicolor')
+    if not os.path.exists(icon_cache_dir):
+        os.makedirs(icon_cache_dir)
+    subprocess.call(['gtk-update-icon-cache', '-qtf', icon_cache_dir])
+
+    print('Updating desktop database...')
+    desktop_database_dir = os.path.join(datadir, 'applications')
+    if not os.path.exists(desktop_database_dir):
+        os.makedirs(desktop_database_dir)
+    subprocess.call(['update-desktop-database', '-q', desktop_database_dir])
+
+    print('Compiling gsettings schemas...')
+    subprocess.call(['glib-compile-schemas', schemadir])