registry: improve plugin loader failure message for uninstalled setups

Everyone running an uninstalled git setup is going to wonder about
this failure next time they update, so let's mention the solution
in the error message.

diff --git a/gst/gstregistry.c b/gst/gstregistry.c
index e277742..ac5598e 100644 (file)
--- a/gst/gstregistry.c
+++ b/gst/gstregistry.c
@@ -890,7 +890,12 @@ gst_registry_scan_plugin_file (GstRegistryScanContext * context,
     GST_DEBUG ("Using scan-helper to load plugin %s", filename);
     if (!_priv_gst_plugin_loader_funcs.load (context->helper,
             filename, file_size, file_mtime)) {
-      g_warning ("External plugin loader failed...");
+      g_warning ("External plugin loader failed. This most likely means that "
+          "the plugin loader helper binary was not found or could not be run. "
+          "%s", (g_getenv ("GST_PLUGIN_PATH") != NULL) ?
+          "If you are running an uninstalled GStreamer setup, you might need "
+          "to update your gst-uninstalled script so that the "
+          "GST_PLUGIN_SCANNER environment variable gets set." : "");
       context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
     }
   } else {