---
name: Cleanup

on:
  pull_request:
    types:
      - closed

jobs:
  cleanup-cache:
    runs-on: ubuntu-latest
    steps:
      - name: 'Cleanup PR cache'
        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 | 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"
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}