docker-build.yaml

name: Create and publish Docker images with specific build args

on:
  workflow_dispatch:
  push:
    branches:
      - main
      - dev

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  FULL_IMAGE_NAME: ghcr.io/${{ github.repository }}

jobs:
  build-main-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64

    steps:
      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

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

      - name: Extract metadata for Docker images (default latest tag)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FULL_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=sha,prefix=git-
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
          flavor: |
            latest=${{ github.ref == 'refs/heads/main' }}

      - name: Extract metadata for Docker cache
        id: cache-meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FULL_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
          flavor: |
            prefix=cache-${{ matrix.platform }}-

      - name: Build Docker image (latest)
        uses: docker/build-push-action@v5
        id: build
        with:
          context: .
          push: true
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.FULL_IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=registry,ref=${{ steps.cache-meta.outputs.tags }}
          cache-to: type=registry,ref=${{ steps.cache-meta.outputs.tags }},mode=max
          build-args: |
            BUILD_HASH=${{ github.sha }}

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-main-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge-main-images:
    runs-on: ubuntu-latest
    needs: [build-main-image]
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          pattern: digests-main-*
          path: /tmp/digests
          merge-multiple: true

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

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

      - name: Extract metadata for Docker images (default latest tag)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FULL_IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=sha,prefix=git-
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
          flavor: |
            latest=${{ github.ref == 'refs/heads/main' }}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.FULL_IMAGE_NAME }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.FULL_IMAGE_NAME }}:${{ steps.meta.outputs.version }}