pr-clean-cache.yml

name: PR Cache Cleanup

on:
  pull_request:
    types: [ closed ]

jobs:
  pr-clean-cache:
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@f086349bfa2bd1361f7909c78558e816508cdc10 # v2.8.0
        with:
          disable-sudo: true
          egress-policy: block
          allowed-endpoints: >
            api.github.com:443
            objects.githubusercontent.com:443

      - name: Clean up
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge
        run: |
          gh extension install actions/gh-actions-cache

          echo "Fetching list of cache key"
          cacheKeysForPR=$(gh actions-cache list -R "$REPO" -B "$BRANCH" -L 100 | cut -f 1 )

          ## Setting this to not fail the workflow while deleting cache keys.
          set +e
          echo "Deleting caches..."
          for cacheKey in $cacheKeysForPR
          do
              gh actions-cache delete "$cacheKey" -R "$REPO" -B "$BRANCH" --confirm
              echo " - Deleted cache key: $cacheKey"
          done
          echo "Done"