publish-seichiassist-builder.yml

name: Build and publish seichiassist-builder docker image
on:
  push:
    branches:
    - main
    paths:
    - 'seichiassist-builder/**'
    - '.github/workflows/publish-seichiassist-builder.yml'

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    env:
      image_name: seichiassist-builder

    # 参考: https://qiita.com/kawakawaryuryu/items/b0291c1bc1141a535263
    steps:
      - name: Checkout code
        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
        with:
          submodules: recursive

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - id: prepare_image_id
        name: Prepare image id's components
        run: |
          lowercase_id=ghcr.io/${{ github.repository_owner }}/${{ env.image_name }}
          echo "::set-output name=lowercase_id::$(echo $lowercase_id | tr '[A-Z]' '[a-z]')"
          echo "::set-output name=short-ref::$(git rev-parse --short "$GITHUB_SHA")"

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: ./seichiassist-builder
          builder: ${{ steps.buildx.outputs.name }}
          push: true
          tags: |
            ${{ steps.prepare_image_id.outputs.lowercase_id }}:latest
            ${{ steps.prepare_image_id.outputs.lowercase_id }}:${{ steps.prepare_image_id.outputs.short-ref }}
          cache-from: type=gha
          # すべてのビルドステージのすべてのレイヤーをキャッシュして欲しいのでmode=max
          cache-to: type=gha,mode=max