Add support for POWER_PROFILE_DAEMON_ACTION_BLOCK

This can let people avoid loading actions that on their system
in the event of a problem or desire not to use.

src/power-profiles-daemon.c

@@ -976,6 +976,21 @@ stop_profile_drivers (PpdApp *data)
   g_clear_object (&data->platform_driver);
 }
 
+static gboolean
+action_blocked (PpdAction *action)
+{
+  const gchar *action_name = ppd_action_get_action_name (action);
+  const gchar *env = g_getenv ("POWER_PROFILE_DAEMON_ACTION_BLOCK");
+
+  if (env == NULL)
+    return FALSE;
+
+  g_auto(GStrv) actions = NULL;
+
+  actions = g_strsplit (env, ",", -1);
+  return g_strv_contains ((const gchar *const *)actions, action_name);
+}
+
 static gboolean
 driver_blocked (PpdDriver *driver)
 {
@@ -1063,6 +1078,11 @@ start_profile_drivers (PpdApp *data)
 
       g_debug ("Handling action '%s'", ppd_action_get_action_name (action));
 
+      if (action_blocked (action)) {
+        g_debug ("Action '%s' is blocked, skipping", ppd_action_get_action_name (action));
+        continue;
+      }
+
       if (ppd_action_probe (action) == PPD_PROBE_RESULT_FAIL) {
         g_debug ("probe () failed for action '%s', skipping",
                  ppd_action_get_action_name (action));

tests/integration_test.py

@@ -809,6 +809,29 @@ class Tests(dbusmock.DBusTestCase):
 
         self.stop_daemon()
 
+    def test_action_blocklist(self):
+        """Test action blocklist works"""
+        self.testbed.add_device(
+            "drm",
+            "card1-eDP",
+            None,
+            ["amdgpu/panel_power_savings", "0"],
+            ["DEVTYPE", "drm_connector"],
+        )
+
+        self.create_amd_apu()
+
+        self.spawn_server_template(
+            "upower",
+            {"DaemonVersion": "0.99", "OnBattery": False},
+            stdout=subprocess.PIPE,
+        )
+
+        # Block panel_power action
+        os.environ["POWER_PROFILE_DAEMON_ACTION_BLOCK"] = "amdgpu_panel_power"
+        self.start_daemon()
+        self.assertNotIn("amdgpu_panel_power", self.get_dbus_property("Actions"))
+
     def test_driver_blocklist(self):
         """Test driver blocklist works"""
         # Create 2 CPUs with preferences