name: Cleanup cache

on:
  pull_request:
    types:
      - closed

jobs:
  cleanup-cache:
    runs-on: ubuntu-latest
    steps:
      - run: |
          gh extension install actions/gh-actions-cache

          echo "Fetching list of cache keys"
          cacheKeys=$(gh actions-cache list -R $GITHUB_REPOSITORY -B $BRANCH | cut -f 1 )

          echo "Deleting caches..."
          for cacheKey in $cacheKeys; do
            gh actions-cache delete $cacheKey -R $GITHUB_REPOSITORY -B $BRANCH --confirm
          done
        shell: bash
        continue-on-error: true
        env:
          GH_TOKEN: ${{ github.token }}
          BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge