pr-cleanup.yml

name: Cleanup caches on PR close
on:
    pull_request:
        types:
            - closed

jobs:
    cleanup:
        runs-on: ubuntu-24.04
        steps:
            - name: Check out code
              uses: actions/checkout@v4

            - name: Cleanup
              run: |
                  gh extension install actions/gh-actions-cache

                  REPO=${{ github.repository }}
                  BRANCH="refs/pull/${{ github.event.pull_request.number }}/merge"

                  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
                  done
                  echo "Done"

                  echo "Cleaning up any auto-generated branches."
                  snapshotBranch=gha/snapshots-${{ github.head_ref }}
                  if (git ls-remote --exit-code --heads origin ${snapshotBranch} >/dev/null) ; then
                      git push -d origin gha/snapshots-${{ github.head_ref }}
                  fi
              env:
                  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}