daemon/sysroot: Emit UPDATED signal for configs

Let's also make sure we refresh `RPMOSTreeOS` objects when configs
changed. Specifically, what they export to their D-Bus interfaces may be
dependent on daemon settings, as is the case with auto-updates.

We might want to decouple this into two separate signals in the future
(one for sysroot changes, and one for config changes), though given that
only `RPMOSTreeOS` listens for `UPDATED` right now, we can just get away
with a single one for the time being.

Closes: #1261
Approved by: cgwalters

src/daemon/rpmostreed-sysroot.c

@@ -409,6 +409,7 @@ handle_unregister_client (RPMOSTreeSysroot *object,
   return TRUE;
 }
 
+/* remap relevant daemon configs to D-Bus properties */
 static gboolean
 reset_config_properties (RpmostreedSysroot  *self,
                          GError            **error)
@@ -438,9 +439,15 @@ handle_reload_config (RPMOSTreeSysroot *object,
   if (changed && !reset_config_properties (self, error))
     goto out;
 
-  if (!rpmostreed_sysroot_reload (self, error))
+  gboolean sysroot_changed;
+  if (!rpmostreed_sysroot_reload (self, &sysroot_changed, error))
     goto out;
 
+  /* also send an UPDATED signal if configs changed to cause OS interfaces to reload; we do
+   * it here if not done already in `rpmostreed_sysroot_reload` */
+  if (changed && !sysroot_changed)
+    g_signal_emit (self, signals[UPDATED], 0);
+
   rpmostree_sysroot_complete_reload_config (object, invocation);
 out:
   if (local_error)
@@ -683,6 +690,7 @@ rpmostreed_sysroot_class_init (RpmostreedSysrootClass *klass)
 
 gboolean
 rpmostreed_sysroot_reload (RpmostreedSysroot *self,
+                           gboolean *out_changed,
                            GError **error)
 {
   gboolean ret = FALSE;
@@ -695,6 +703,8 @@ rpmostreed_sysroot_reload (RpmostreedSysroot *self,
     goto out;
 
   ret = TRUE;
+  if (out_changed)
+    *out_changed = did_change;
  out:
   if (ret && did_change)
     g_signal_emit (self, signals[UPDATED], 0);
@@ -713,7 +723,7 @@ on_deploy_changed (GFileMonitor *monitor,
 
   if (event_type == G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED)
     {
-      if (!rpmostreed_sysroot_reload (self, &error))
+      if (!rpmostreed_sysroot_reload (self, NULL, &error))
         goto out;
     }
 

src/daemon/rpmostreed-sysroot.h

@@ -36,6 +36,7 @@ gboolean            rpmostreed_sysroot_populate         (RpmostreedSysroot *self
                                                          GCancellable *cancellable,
                                                          GError **error);
 gboolean            rpmostreed_sysroot_reload           (RpmostreedSysroot *self,
+                                                         gboolean *out_changed,
                                                          GError **error);
 
 OstreeSysroot *     rpmostreed_sysroot_get_root         (RpmostreedSysroot *self);

src/daemon/rpmostreed-transaction.c

@@ -326,7 +326,7 @@ transaction_execute_done_cb (GObject *source_object,
   success = g_task_propagate_boolean (G_TASK (result), &local_error);
   if (success)
     {
-      if (!rpmostreed_sysroot_reload (rpmostreed_sysroot_get (), &local_error))
+      if (!rpmostreed_sysroot_reload (rpmostreed_sysroot_get (), NULL, &local_error))
         success = FALSE;
     }