build-and-push.yaml

name: build-and-push

on:
  push: {}
  workflow_dispatch:
    inputs:
      root:
        description: 'root directory to look for Dockerfiles'
        required: true
        default: '.'
        type: string
      build_all:
        description: 'build all images'
        required: false
        default: false
        type: boolean

jobs:
  generate-matrix:
    name: Generate build matrix
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Get changed files
        if: ${{ inputs.build_all == false }}
        id: changed-files
        with:
          dir_names: "true"
          path: ${{ inputs.root }}
        uses: tj-actions/changed-files@v45.0.7
      - id: set-matrix
        run: |
          echo "matrix=$(
            for dir in ${{ inputs.build_all && format('{0}/*', inputs.root) || steps.changed-files.outputs.all_changed_files }}; do
              [[ -f "$dir/Dockerfile" ]] || continue
              name="$(basename "$dir")"
              jq -n --arg dir "${dir#./}" --arg name "${name//_/-}" '{"dir": $dir, "name": $name}'
            done | jq -c -r -s '.'
          )" >> "$GITHUB_OUTPUT"

  build-and-push-images:
    needs: [generate-matrix]
    runs-on: ubuntu-latest
    if: ${{ needs.generate-matrix.outputs.matrix != '[]' }}
    strategy:
      fail-fast: true
      matrix:
        include: ${{ fromJson(needs.generate-matrix.outputs.matrix) }}

    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          lfs: true
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
            images: ghcr.io/${{ github.repository }}/${{ matrix.dir }}
            tags: |
                # 'latest' on main branch
                type=ref,event=branch,pattern=latest
                # Semver from a tag like v1.2.3 => v1.2.3, v1.2, and v1
                type=semver,pattern=v{{version}}
                type=semver,pattern=v{{major}}.{{minor}}
                type=semver,pattern=v{{major}}

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

      - name: Build and push Docker image
        id: build_and_push
        uses: docker/build-push-action@v6
        with:
            context: ${{ matrix.dir }}
            file: ${{ matrix.dir }}/Dockerfile
            push: true
            platforms: linux/amd64,linux/arm64
            tags: ${{ steps.meta.outputs.tags }}
            labels: ${{ steps.meta.outputs.labels }}