.github/workflows/cancel-duplicates.yml

name: Cancelling Duplicates
on:
  workflow_run:
    workflows:
      - 'CI'
    types: ['requested']

# See https://github.com/potiuk/cancel-workflow-runs#most-often-used-canceling-example

jobs:
  cancel-duplicate-workflow-runs:
    name: "Cancel duplicate workflow runs"
    runs-on: ubuntu-latest
    steps:
      - uses: potiuk/cancel-workflow-runs@953e057dc81d3458935a18d1184c386b0f6b5738 # 2020-10-01
        name: "Cancel duplicate workflow runs"
        with:
          cancelMode: allDuplicates
          token: ${{ secrets.GITHUB_TOKEN }}
          sourceRunId: ${{ github.event.workflow_run.id }}