name: Clean container registry
on:
  push:
  workflow_dispatch:
jobs:
  clean:
    runs-on: docker
    strategy:
      matrix:
        box:
          - "devbox"
    steps:
      - name: Get timestamp
        id: timestamp
        run: |
          echo "year=$(date +'%Y-%m')" >> $GITHUB_OUTPUT
          echo "current_month=$(date +'%Y-%m')" >> $GITHUB_OUTPUT
      - uses: actions/delete-package-versions@v5
        with:
          package-name: ${{matrix.box}}
          package-type: 'container'
          min-version-to-keep: 3
          # ignore latest and this month uploads
          ignore-versions: '^(?:latest)$'
          token: ${{ secrets.CONTAINER_REGISTRY_TOKEN }}