cleanup-nightly-assets.yaml

name: Cleanup Nightly Assets

on:
  workflow_dispatch:  # Manual trigger
  schedule:
  - cron: '0 0 * * 0' # At 00:00 on Sunday, UTC

jobs:
  nightly:
    if: ${{ github.repository == 'shipwright-io/build' }}
    runs-on: ubuntu-latest
    permissions:
      contents: write  # To be able to update releases.

    steps:
    - uses: actions/checkout@v4
    - name: Get current month
      id: currentmonth
      run: echo "date=$(date +'%Y-%m')" >> $GITHUB_OUTPUT
    - name: Get previous month
      id: previousmonth
      run: echo "date=$(date -d "1 month ago" +%Y-%m)" >> $GITHUB_OUTPUT
    - name: Generate and upload release YAMLs
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: |
        WORK_DIR=`mktemp -d -p "$DIR"`
        gh release download nightly -D ${WORK_DIR}
        
        ASSETS_TOTAL=$(ls $WORK_DIR | wc -l)
        echo "[INFO] Currently ${ASSETS_TOTAL} assets for nightly release"

        ASSETS_TO_REMOVE=$(ls $WORK_DIR | grep  -v "${{ steps.currentmonth.outputs.date }}\|${{ steps.previousmonth.outputs.date }}" | wc -l)
        if [ "$ASSETS_TO_REMOVE" -eq "0" ]; then
          echo "[INFO] Nothing to delete"
          exit 0
        fi

        echo "[INFO] Going to delete ${ASSETS_TO_REMOVE} assets"

        find $WORK_DIR -type f -iname "*.yaml" -printf "%f\n" | grep  -v "${{ steps.currentmonth.outputs.date }}\|${{ steps.previousmonth.outputs.date }}" |
          while IFS= read FILE; do
            # sleep 2 sec, as recommended by https://docs.github.com/en/rest/guides/best-practices-for-using-the-rest-api?apiVersion=2022-11-28#dealing-with-secondary-rate-limits
            sleep 2
            echo "[INFO] Going to delete ${FILE} asset"
            gh release delete-asset nightly $FILE -y
          done

        rm -rf "$WORK_DIR"
        echo "[INFO] Deleted temporary directory ${WORK_DIR}"