Cancel already running pipeline on MR when pushing new commits

When opening an MR a pipeline run will be triggered. If a new commit is added to this MR a new pipeline will be started and the pipeline from an earlier commit should be cancelled.

Problem Statement

Multiple running (parallel) pipelines on a single MR. The result of the "old" pipeline is irrelevant.

Who will benefit?

Everyone 🎉

Benefits and risks

This will speed-up MRs and maybe other parallel CI runs and save resources on the test infrastructure.

Proposed solution

Examples

There is an GitHub Action (cancel-workflow-action) that does excactly this.

Priority/Severity

• High (This will bring a huge increase in performance/productivity/usability/legislative cover)
• Medium (This will bring a good increase in performance/productivity/usability)
• Low (anything else e.g., trivial, minor improvements)