cleanup-cache.yml

name: Cleanup caches

on:
  pull_request:
    types:
      - closed
  workflow_dispatch:

permissions:
  actions: write
  contents: read

jobs:
  cleanup:
    name: Cleanup caches
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Cleanup caches
        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 cache keys"
          cacheKeysForPR=$(gh actions-cache list -R "$REPO" -B "$BRANCH" | cut -f 1)

          if [ -z "$cacheKeysForPR" ]; then
            echo "No caches to delete"
            exit 0
          fi

          set +e
          echo "Deleting caches..."
          for cacheKey in $cacheKeysForPR; do
            gh actions-cache delete "$cacheKey" -R "$REPO" -B "$BRANCH" --confirm
          done
          echo "Done"