Display warning if UI file fails

When trying to load ui files, we try to find the file in several directories.
If a file is not found in one directory, try to load it from the next directory.
However, if a file is found in a directory but we are not able to load it (e.g.
due to unsupported versions of glade used to generate it, etc), we should print
a warning to the terminal to help the developer debug the issue.

This is an unexpected failure (whereas not finding the file in that directory at
all is an 'expected' failure).

1 files changed, 6 insertions, 1 deletions

diff --git a/src/virt-viewer-util.c b/src/virt-viewer-util.c
index 9deddad..4c60583 100644
--- a/src/virt-viewer-util.c
+++ b/src/virt-viewer-util.c
@@ -58,7 +58,12 @@ GtkBuilder *virt_viewer_util_load_ui(const char *name)
         gtk_builder_add_from_file(builder, name, &error);
     } else {
         gchar *path = g_build_filename(PACKAGE_DATADIR, "ui", name, NULL);
-        gboolean success = (gtk_builder_add_from_file(builder, path, NULL) != 0);
+        gboolean success = (gtk_builder_add_from_file(builder, path, &error) != 0);
+        if (error) {
+            if (!(error->domain == G_FILE_ERROR && error->code == G_FILE_ERROR_NOENT))
+                g_warning("Failed to add ui file '%s': %s", path, error->message);
+            g_clear_error(&error);
+        }
         g_free(path);
 
         if (!success) {