cancel_pipelines: reverse order of cancellation

Cancel parent pipeline first before cancelling its children in order not
to have failed parent pipelines (trigger jobs are failed if their
downstream pipeline is cancelled).

scripts/cancel_pipelines.py

@@ -24,6 +24,10 @@ def cancel_pipeline_including_children(
 
     cancelled_pipelines = []
 
+    if pipeline.status not in ["success", "failed", "canceled"]:
+        cancelled_pipelines.append(pipeline)
+        pipeline.cancel()
+
     # Browse through all downstream pipelines
     for bridge in pipeline.bridges.list(as_list=False):
 
@@ -41,10 +45,6 @@ def cancel_pipeline_including_children(
         cancelled_pipelines += cancel_pipeline_including_children(
             project, downstream_pipeline
         )
-        if downstream_pipeline.status not in ["success", "failed", "canceled"]:
-            cancelled_pipelines.append(downstream_pipeline)
-
-    pipeline.cancel()
 
     return cancelled_pipelines
 
@@ -73,8 +73,6 @@ def cancel_pipelines(
     for pipeline in pipelines:
         if pipeline.id < below_pipeline_id:
             cancelled_pipelines += cancel_pipeline_including_children(project, pipeline)
-            if pipeline.status not in ["success", "failed", "canceled"]:
-                cancelled_pipelines.append(pipeline)
 
     return cancelled_pipelines