deploy_gitlab_ci: exit successfully if submodule already up to date

deploy_gitlab_ci.py

@@ -67,6 +67,9 @@ def main():
     integration_branch, _, submodule_project = update_submodule(
         project, args.submodule, args.revision, args.branch
     )
+    # If submodule is already at specified revision, exit successfully
+    if not integration_branch:
+        sys.exit(0)
 
     # Get source merge request
     mrs = get_merge_requests(

update_submodule.py

@@ -40,7 +40,7 @@ def update_submodule(project, submodule_name, submodule_revision, branch=None):
         # Check if revisions are different
         if submodule.hexsha == submodule_revision:
             print("Submodule is already at %s" % submodule_revision)
-            return 0
+            return (None, None, None)
 
         # Check for relative path
         if not submodule.url.startswith(".."):