From 3f90dca733c54e33b90aa10dcc10d4bf10bc03fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim-Philipp=20M=C3=BCller?= <tim@centricular.com>
Date: Thu, 11 Apr 2024 14:13:24 +0100
Subject: [PATCH] ci: trigger_cerbero_pipeline: improve error in case of
 insufficient permissions

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6608>
---
 ci/gitlab/trigger_cerbero_pipeline.py | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/ci/gitlab/trigger_cerbero_pipeline.py b/ci/gitlab/trigger_cerbero_pipeline.py
index 6390fa30ef..4a95f39e90 100755
--- a/ci/gitlab/trigger_cerbero_pipeline.py
+++ b/ci/gitlab/trigger_cerbero_pipeline.py
@@ -91,11 +91,26 @@ if __name__ == "__main__":
         variables['MESON_COMMIT'] = meson_commit
         del variables['CI_GSTREAMER_TRIGGERED']
 
-    pipe = cerbero.trigger_pipeline(
-        token=os.environ['CI_JOB_TOKEN'],
-        ref=cerbero_branch,
-        variables=variables,
-    )
+    try:
+        pipe = cerbero.trigger_pipeline(
+            token=os.environ['CI_JOB_TOKEN'],
+            ref=cerbero_branch,
+            variables=variables,
+        )
+    except gitlab.exceptions.GitlabCreateError as e:
+        if e.response_code == 400:
+            exit('''
+
+            Could not start cerbero sub-pipeline due to insufficient permissions.
+
+            This is not a problem and is expected if you are not a GStreamer
+            developer with merge permission in the cerbero project.
+
+            When your Merge Request is assigned to Marge (our merge bot), it
+            will trigger the cerbero sub-pipeline with the correct permissions.
+            ''')
+        else:
+            exit(f'Could not create cerbero sub-pipeline. Error: {e}')
 
     fprint(f'Cerbero pipeline running at {pipe.web_url} ')
     while True: