name: Cleanup branch caches
on:
  pull_request:
    types: [opened, closed, reopened, synchronize]
  push:
  workflow_dispatch:
  workflow_call:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  actions: write

jobs:
  cleanup:
    runs-on: ubuntu-latest
    if: ${{ github.ref != 'refs/heads/main' }}
    steps:
      - name: Cleanup
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh extension install actions/gh-actions-cache

          REPO=${{ github.repository }}
          BRANCH=${{ github.ref }}

          echo "Fetching list of cache key"
          cacheKeysForPR=$(gh actions-cache list -R "$REPO" -B "$BRANCH" --limit 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"
