docker.yml

name: Build and Push Docker Image
on:
  release:
    types: [created]
  workflow_dispatch:
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
jobs:
  build-and-push-by-digest:
    strategy:
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-latest
            arch: amd64
            rustflags: "-C target-cpu=native"
          - platform: linux/arm64
            runner: ubuntu-22.04-arm
            arch: arm64
            rustflags: "-C codegen-units=1"
    runs-on: ${{ matrix.runner }}
    permissions:
      contents: read
      packages: write
    steps:
      - name: Set Lowercase Image Name
        run: echo "LOWERCASE_IMAGE_NAME=$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 1
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: ${{ matrix.platform }}
          provenance: mode=max
          sbom: true
          build-args: |
            RUSTFLAGS=${{ matrix.rustflags }}
            CARGO_INCREMENTAL=0
          push: true
          # Push by digest only (no tag)
          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.LOWERCASE_IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
      
      # Export digest to a file for use in the manifest job
      - name: Export digest
        run: |
          mkdir -p ${{ runner.temp }}/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${digest#sha256:}"
      
      # Upload digest as an artifact
      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.arch }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1
  
  create-manifest:
    needs: build-and-push-by-digest
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Set Lowercase Image Name
        run: echo "LOWERCASE_IMAGE_NAME=$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.LOWERCASE_IMAGE_NAME }}
          tags: |
            type=sha
            type=ref,event=tag
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/') }}
      
      # Download all digest artifacts
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true
      
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
          
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          install: true
          use: true
      
      # Create and push manifest with all tags
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(echo "${{ steps.meta.outputs.tags }}" | sed 's/,/ -t /g' | sed 's/^/-t /') \
            $(printf '${{ env.REGISTRY }}/${{ env.LOWERCASE_IMAGE_NAME }}@sha256:%s ' *)
      
      # Optional: Inspect the manifest to verify
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.LOWERCASE_IMAGE_NAME }}:${{ steps.meta.outputs.version }}