dependencies.yml

name: "Dependency Image"

on:
  push:
  workflow_dispatch:

env:
  DOCKER_DEPENDENCY_IMAGE_NAME: ghcr.io/genspectrum/lapis-silo-dependencies

jobs:
  dependencyImage:
    name: Build Docker Image Dependencies
    runs-on: ubuntu-latest
    permissions:
      packages: write
    steps:
      - uses: actions/checkout@v4

      - name: Generate dependency files hash
        id: files-hash
        run: |
          DIR_HASH=$(echo -n ${{ hashFiles('conanfile.py', 'conanprofile.docker', '.github/workflows/ci.yml', './Dockerfile_dependencies') }})
          echo "DIR_HASH=$DIR_HASH" >> $GITHUB_ENV

      - name: Docker metadata
        id: dockerMetadata
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.DOCKER_DEPENDENCY_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
            type=raw,value=${{ env.DIR_HASH }}
            type=sha,format=long,prefix=commit-

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Check if image exists
        id: check-image
        run: |
          EXISTS=$(docker manifest inspect ${{ env.DOCKER_DEPENDENCY_IMAGE_NAME }}:${{ env.DIR_HASH }} > /dev/null 2>&1 && echo "true" || echo "false")
          echo "CACHE_HIT=$EXISTS" >> $GITHUB_ENV

      - name: Set up Docker Buildx
        if: env.CACHE_HIT == 'false'
        uses: docker/setup-buildx-action@v3

      - name: Build and push image if input files changed
        if: env.CACHE_HIT == 'false'
        uses: docker/build-push-action@v6
        with:
          context: .
          file: Dockerfile_dependencies
          push: true
          tags: ${{ steps.dockerMetadata.outputs.tags }}
          cache-from: type=gha,ref=builder-image-cache-${{ hashFiles('conanfile.py', 'Dockerfile') }}
          cache-to: type=gha,mode=min,ref=builder-image-cache-${{ hashFiles('conanfile.py', 'Dockerfile') }}
          platforms: 'linux/amd64'

      - name: Retag and push existing image if cache hit
        if: env.CACHE_HIT == 'true'
        run: |
          TAGS=(${{ steps.dockerMetadata.outputs.tags }})
          for TAG in "${TAGS[@]}"; do
            docker buildx imagetools create --tag $TAG ${{ env.DOCKER_DEPENDENCY_IMAGE_NAME }}:${{ env.DIR_HASH }}
          done