[gnome-software/1138-reboot-is-needed-to-find-flathub-apps-after-installing-flathub-flatpakrepo] flatpak: Do a full refresh when a Flatpak installation changes

[Milan Crha <mcrha src gnome org>]

commit 469fc8d3601f549b668cd00fb1314bf6688ce5e4
Author: Milan Crha <mcrha redhat com>
Date:   Mon Apr 12 18:33:29 2021 +0200

    flatpak: Do a full refresh when a Flatpak installation changes
    
    The installation change can mean not only application changes, but
    also changes in the remotes. The associated silo should be invalidated
    and a full refresh should be done to have the applications provided
    by just installed remote available without gnome-software restart.
    
    Closes https://gitlab.gnome.org/GNOME/gnome-software/-/issues/1138

 plugins/flatpak/gs-flatpak.c | 61 +++++++++++++++++++++++++++-----------------
 1 file changed, 37 insertions(+), 24 deletions(-)
---
diff --git a/plugins/flatpak/gs-flatpak.c b/plugins/flatpak/gs-flatpak.c
index 535ce4c38..3dd1160b6 100644
--- a/plugins/flatpak/gs-flatpak.c
+++ b/plugins/flatpak/gs-flatpak.c
@@ -43,14 +43,11 @@ struct _GsFlatpak {
        GMutex                   app_silos_mutex;
        GHashTable              *remote_title; /* gchar *remote name ~> gchar *remote title */
        GMutex                   remote_title_mutex;
+       gboolean                 requires_full_rescan;
 };
 
 G_DEFINE_TYPE (GsFlatpak, gs_flatpak, G_TYPE_OBJECT)
 
-static gboolean
-gs_flatpak_refresh_appstream (GsFlatpak *self, guint cache_age,
-                             GCancellable *cancellable, GError **error);
-
 static void
 gs_plugin_refine_item_scope (GsFlatpak *self, GsApp *app)
 {
@@ -402,13 +399,7 @@ gs_plugin_flatpak_changed_cb (GFileMonitor *monitor,
 {
        g_autoptr(GError) error = NULL;
        g_autoptr(GMutexLocker) locker = NULL;
-
-       /* manually drop the cache */
-       if (!flatpak_installation_drop_caches (self->installation,
-                                              NULL, &error)) {
-               g_warning ("failed to drop cache: %s", error->message);
-               return;
-       }
+       g_autoptr(GRWLockWriterLocker) writer_locker = NULL;
 
        /* drop the installed refs cache */
        locker = g_mutex_locker_new (&self->installed_refs_mutex);
@@ -420,6 +411,13 @@ gs_plugin_flatpak_changed_cb (GFileMonitor *monitor,
        g_hash_table_remove_all (self->remote_title);
        g_clear_pointer (&locker, g_mutex_locker_free);
 
+       writer_locker = g_rw_lock_writer_locker_new (&self->silo_lock);
+       if (self->silo)
+               xb_silo_invalidate (self->silo);
+       g_clear_pointer (&writer_locker, g_rw_lock_writer_locker_free);
+
+       self->requires_full_rescan = TRUE;
+
        gs_plugin_cache_invalidate (self->plugin);
        gs_plugin_reload (self->plugin);
 }
@@ -956,6 +954,21 @@ gs_flatpak_rescan_appstream_store (GsFlatpak *self,
        return TRUE;
 }
 
+static gboolean
+gs_flatpak_rescan_app_data (GsFlatpak *self,
+                           GCancellable *cancellable,
+                           GError **error)
+{
+       if (self->requires_full_rescan) {
+               gboolean res = gs_flatpak_refresh (self, 0, cancellable, error);
+               if (res)
+                       self->requires_full_rescan = FALSE;
+               return res;
+       }
+
+       return gs_flatpak_rescan_appstream_store (self, cancellable, error);
+}
+
 gboolean
 gs_flatpak_setup (GsFlatpak *self, GCancellable *cancellable, GError **error)
 {
@@ -1299,7 +1312,7 @@ gs_flatpak_add_sources (GsFlatpak *self, GsAppList *list,
        g_autoptr(GPtrArray) xremotes = NULL;
 
        /* refresh */
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        /* get installed apps and runtimes */
@@ -1624,7 +1637,7 @@ gs_flatpak_add_updates (GsFlatpak *self, GsAppList *list,
        g_autoptr(GPtrArray) xrefs = NULL;
 
        /* ensure valid */
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        /* get all the updatable apps and runtimes */
@@ -1930,7 +1943,7 @@ gs_flatpak_create_fake_ref (GsApp *app, GError **error)
        return xref;
 }
 
-/* the _unlocked() version doesn't call gs_flatpak_rescan_appstream_store,
+/* the _unlocked() version doesn't call gs_flatpak_rescan_app_data,
  * in order to avoid taking the writer lock on self->silo_lock */
 static gboolean
 gs_flatpak_refine_app_state_unlocked (GsFlatpak *self,
@@ -2041,7 +2054,7 @@ gs_flatpak_refine_app_state (GsFlatpak *self,
                              GError **error)
 {
        /* ensure valid */
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        return gs_flatpak_refine_app_state_unlocked (self, app, cancellable, error);
@@ -2835,7 +2848,7 @@ gs_flatpak_refine_appstream (GsFlatpak *self,
        return TRUE;
 }
 
-/* the _unlocked() version doesn't call gs_flatpak_rescan_appstream_store,
+/* the _unlocked() version doesn't call gs_flatpak_rescan_app_data,
  * in order to avoid taking the writer lock on self->silo_lock */
 static gboolean
 gs_flatpak_refine_app_unlocked (GsFlatpak *self,
@@ -3005,7 +3018,7 @@ gs_flatpak_refine_app (GsFlatpak *self,
                       GError **error)
 {
        /* ensure valid */
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        return gs_flatpak_refine_app_unlocked (self, app, flags, cancellable, error);
@@ -3028,7 +3041,7 @@ gs_flatpak_refine_wildcard (GsFlatpak *self, GsApp *app,
                return TRUE;
 
        /* ensure valid */
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
@@ -3431,7 +3444,7 @@ gs_flatpak_search (GsFlatpak *self,
        GHashTableIter iter;
        gpointer key, value;
 
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
@@ -3516,7 +3529,7 @@ gs_flatpak_add_categories (GsFlatpak *self,
 {
        g_autoptr(GRWLockReaderLocker) locker = NULL;
 
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
@@ -3533,7 +3546,7 @@ gs_flatpak_add_popular (GsFlatpak *self,
        g_autoptr(GsAppList) list_tmp = gs_app_list_new ();
        g_autoptr(GRWLockReaderLocker) locker = NULL;
 
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
@@ -3555,7 +3568,7 @@ gs_flatpak_add_featured (GsFlatpak *self,
        g_autoptr(GsAppList) list_tmp = gs_app_list_new ();
        g_autoptr(GRWLockReaderLocker) locker = NULL;
 
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
@@ -3578,7 +3591,7 @@ gs_flatpak_add_alternates (GsFlatpak *self,
        g_autoptr(GsAppList) list_tmp = gs_app_list_new ();
        g_autoptr(GRWLockReaderLocker) locker = NULL;
 
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
@@ -3601,7 +3614,7 @@ gs_flatpak_add_recent (GsFlatpak *self,
        g_autoptr(GsAppList) list_tmp = gs_app_list_new ();
        g_autoptr(GRWLockReaderLocker) locker = NULL;
 
-       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+       if (!gs_flatpak_rescan_app_data (self, cancellable, error))
                return FALSE;
 
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);