endSessionDialog: Initialize Polkit permission asynchronously

The updatesPermission is currently initialized synchronously, which
blocks the Mainloop for quite some time and therefore slows down startup
of the shell, let's do it asynchronously instead.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/689

diff --git a/js/ui/endSessionDialog.js b/js/ui/endSessionDialog.js
index 0b475b6f966c5ca2573edbcfa4e7b7dcf79288fd..f51eb7bee09d8a6823965a9f2d867552043b8f7c 100644 (file)
--- a/js/ui/endSessionDialog.js
+++ b/js/ui/endSessionDialog.js
@@ -352,12 +352,15 @@ class EndSessionDialog extends ModalDialog.ModalDialog {
         }
 
         // It only makes sense to check for this permission if PackageKit is available.
-        try {
-            this._updatesPermission = Polkit.Permission.new_sync(
-                'org.freedesktop.packagekit.trigger-offline-update', null, null);
-        } catch (e) {
-            log('No permission to trigger offline updates: %s'.format(e.toString()));
-        }
+        Polkit.Permission.new(
+            'org.freedesktop.packagekit.trigger-offline-update', null, null,
+            (source, res) => {
+                try {
+                    this._updatesPermission = Polkit.Permission.new_finish(res);
+                } catch (e) {
+                    log(`No permission to trigger offline updates: ${e}`);
+                }
+            });
     }
 
     _onDestroy() {