build.yml

name: Build ans Push Challenges

on: [workflow_call]  # allow this workflow to be called from other workflows

env:
  REGISTRY: ghcr.io

jobs:
  run:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          lfs: 'false'
      
      - name: Challenge discovery
        id: challenge-discovery
        uses: ./.github/actions/discover-challenges
        with:
          base-dir: '.'

      - name: Docker challenge discovery
        id: docker-chall-discovery
        run: |
          IFS=' ' read -r -a chall_dirs <<< "${{ steps.challenge-discovery.outputs.dirs }}"
          for dir in "${chall_dirs[@]}"; do
              if [[ -f "${dir}/docker-compose.yml" ]]; then
                  dirs+=("${dir}")
              fi
          done
          echo "dirs=${dirs[*]}" >> "$GITHUB_OUTPUT"

      - name: Docker challenges list
        run: echo "${{ steps.docker-chall-discovery.outputs.dirs }}"
      
      - uses: actions/cache/restore@v3
        id: challenges-hashes-cache
        with:
          path: .cache/last_hashes
          key: last-hashes

      - name: Create folder challenge hashes
        id: challenge-hashes
        run: |
          if [ -d .cache ]; then
            rm -f .cache/hashes
          fi
          mkdir -p .cache
          touch .cache/hashes
          IFS=' ' read -r -a challenge_dirs <<< "${{ steps.docker-chall-discovery.outputs.dirs }}"
          for dir in "${challenge_dirs[@]}"; do
            echo "$(find $dir -type f -print0 | sort -z | xargs -0 sha1sum | sha1sum | cut -d " " -f 1) $dir" >> .cache/hashes
          done
          sort .cache/hashes -o .cache/hashes
      
      - name: Find modified challenges
        id: modified-chalenges
        run: |
          COMMIT_MESSAGE=$(git log --format=%B -n 1)
          if [[ "$COMMIT_MESSAGE" == *"[no-cache]"* ]]; then
            rm -f .cache/last_hashes
          fi
          touch .cache/last_hashes
          changes=$(diff .cache/hashes .cache/last_hashes) || true
          if [[ -n "$changes" ]]; then
              changed_dirs=$(echo "$changes" | grep '<' | cut -d ' ' -f 3-)
              echo "$changed_dirs"
          fi
          mv .cache/hashes .cache/last_hashes
          echo dirs="${changed_dirs//$'\n'/ }" >> "$GITHUB_OUTPUT"
      
      - name: Changed challenges list
        run: echo "${{ steps.modified-chalenges.outputs.dirs }}"
      
      - name: Log in to the Container registry
        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
          
      - name: Build challenges
        run: |
          IFS=' ' read -r -a challenge_dirs <<< "${{ steps.modified-chalenges.outputs.dirs }}"
          for challenge_dir in "${challenge_dirs[@]}"; do
            docker compose -f $challenge_dir/docker-compose.yml build
          done
      
      - name: Push challenges
        run: |
          IFS=' ' read -r -a challenge_dirs <<< "${{ steps.modified-chalenges.outputs.dirs }}"
          for challenge_dir in "${challenge_dirs[@]}"; do
            docker compose -f $challenge_dir/docker-compose.yml push
          done
  
      - name: Clear cache
        uses: actions/github-script@v6
        with:
          script: |
            console.log("About to clear")
            const cachesToDelete = ["last-hashes"];
            const caches = await github.rest.actions.getActionsCacheList({
              owner: context.repo.owner,
              repo: context.repo.repo,
            })
            for (const cache of caches.data.actions_caches) {
              if (cachesToDelete.includes(cache.key)) {
                console.log(cache)
                github.rest.actions.deleteActionsCacheById({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  cache_id: cache.id,
                })
              }
            }
            console.log("Clear completed")
      
      - name: Save folder challenge hashes
        id: challenge-hashes-save
        uses: actions/cache/save@v3
        with:
          path: .cache/last_hashes
          key: last-hashes