Show a warning if a desktop file is not found when required

This would have helped some head scratching this morning...

1 files changed, 12 insertions, 0 deletions

diff --git a/libappstream-builder/plugins/asb-plugin-desktop.c b/libappstream-builder/plugins/asb-plugin-desktop.c
index 8e7312f..e41e3e9 100644
--- a/libappstream-builder/plugins/asb-plugin-desktop.c
+++ b/libappstream-builder/plugins/asb-plugin-desktop.c
@@ -246,6 +246,7 @@ asb_plugin_process_app (AsbPlugin *plugin,
 			const gchar *tmpdir,
 			GError **error)
 {
+	gboolean found = FALSE;
 	guint i;
 	const gchar *app_dirs[] = {
 		"/usr/share/applications",
@@ -263,8 +264,19 @@ asb_plugin_process_app (AsbPlugin *plugin,
 			if (!asb_plugin_desktop_refine (plugin, pkg, fn,
 							app, tmpdir, error))
 				return FALSE;
+			found = TRUE;
 		}
 	}
 
+	/* required */
+	if (!found && as_app_get_kind (AS_APP (app)) == AS_APP_KIND_DESKTOP) {
+		g_set_error (error,
+			     ASB_PLUGIN_ERROR,
+			     ASB_PLUGIN_ERROR_FAILED,
+			     "a desktop file is required for %s",
+			     as_app_get_id (AS_APP (app)));
+		return FALSE;
+	}
+
 	return TRUE;
 }