cache-maintenance.yml

name: cache-maintenance

on:
  push:
    branches: [main]
    paths:
      - pnpm-lock.yaml
      - .github/actions/setup-workspace/action.yml
      - .github/workflows/cache-maintenance.yml
  pull_request_target:
    types: [closed]
  workflow_dispatch:

permissions:
  actions: write
  contents: read

jobs:
  seed-pnpm-windows:
    if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/main')
    runs-on: windows-latest
    timeout-minutes: 15
    steps:
      - name: Checkout main
        uses: actions/checkout@v6.0.2

      - name: Seed Windows pnpm cache
        uses: ./.github/actions/setup-workspace
        with:
          save-pnpm-cache: 'true'

  clean-closed-pr-buildkit:
    if: github.event_name == 'pull_request_target' && github.repository == 'nexu-io/open-design'
    runs-on: ubuntu-24.04
    timeout-minutes: 5
    steps:
      - name: Delete closed PR BuildKit caches
        env:
          CACHE_REF: refs/pull/${{ github.event.pull_request.number }}/merge
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail

          cache_rows="$(
            gh cache list \
              --repo "$GITHUB_REPOSITORY" \
              --ref "$CACHE_REF" \
              --limit 10000 \
              --json id,key,sizeInBytes \
              --jq '.[] | select((.key | startswith("buildkit-blob-")) or (.key | startswith("index-buildkit-"))) | [.id, .key, .sizeInBytes] | @tsv'
          )"

          if [ -z "$cache_rows" ]; then
            echo "No closed-PR BuildKit caches found for $CACHE_REF"
            exit 0
          fi

          count=0
          bytes=0
          while IFS=$'\t' read -r cache_id cache_key cache_size; do
            [ -n "$cache_id" ] || continue
            echo "Deleting cache id=$cache_id key=$cache_key bytes=$cache_size ref=$CACHE_REF"
            gh cache delete "$cache_id" --repo "$GITHUB_REPOSITORY"
            count=$((count + 1))
            bytes=$((bytes + cache_size))
          done <<< "$cache_rows"

          echo "Deleted $count closed-PR BuildKit caches ($bytes bytes) for $CACHE_REF"