main.yml

# This is a basic workflow to help you get started with Actions

name: Docker build & Push

# Controls when the action will run. 
on:
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:
  pull_request:
  push:
    tags:
      - '5.*'

env:
  DOCKER_REGISTRY_IMAGE: eveseat/seat
  GHCR_REGISTRY_IMAGE: ghcr.io/eveseat/seat

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64
          - linux/arm/v7
        image:
          - eveseat/seat
          - ghcr.io/eveseat/seat

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - name: Clone repository
        uses: actions/checkout@v3

      - name: Get artifact name
        id: getartifactname
        run: echo "artifact=$(printf '%s-digests' ${{ matrix.image }} | sed 's/\//-/g;s/\./-/g')" >> "$GITHUB_OUTPUT"

      # Define tagging policy
      # - everything coming in another branch than default one is considered edge (unstable)
      # - everything coming in default branch is considered latest
      # - all releases are tags with major, major.minor and version
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ matrix.image }}
          flavor: |
            latest=false
          tags: |
            type=raw,value=edge,enable=${{ github.ref_type == 'branch' && github.ref_name != 'master' }}
            type=raw,value=latest,enable=${{ github.ref_type == 'tag' && github.ref_name == 'master' }}
            type=semver,enable=${{ github.ref_type == 'tag' }},pattern={{major}}
            type=semver,enable=${{ github.ref_type == 'tag' }},pattern={{major}}.{{minor}}
            type=semver,enable=${{ github.ref_type == 'tag' }},pattern={{version}}

      - name: Setup QEMU
        uses: docker/setup-qemu-action@v2

      - name: Setup Docker Build-X
        uses: docker/setup-buildx-action@v2

      - name: Login to Github Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ secrets.GHCR_USERNAME }}
          password: ${{ secrets.GHCR_TOKEN }}

      - name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          registry: docker.io
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Update embedded manifest
        run: |
          echo ${{ steps.meta.outputs.version }} > version

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v4
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ matrix.image }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=gha,ref=eveseat/seat/${{ matrix.platform }}
          cache-to: type=gha,mode=max,ref=eveseat/seat/${{ matrix.platform }}

      - 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@v3
        with:
          name: ${{ steps.getartifactname.outputs.artifact }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  create-manifest:
    runs-on: ubuntu-latest
    needs:
      - build
    strategy:
      fail-fast: false
      matrix:
        image:
          - eveseat/seat
          - ghcr.io/eveseat/seat
    steps:
      - name: Get artifact name
        id: getartifactname
        run: echo "artifact=$(printf '%s-digests' ${{ matrix.image }} | sed 's/\//-/g;s/\./-/g')" >> "$GITHUB_OUTPUT"

      - name: Download digests
        uses: actions/download-artifact@v3
        with:
          name: ${{ steps.getartifactname.outputs.artifact }}
          path: /tmp/digests

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

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ matrix.image }}
          tags: |
            type=raw,value=edge,enable=${{ github.ref_type == 'branch' && github.ref_name != 'master' }}
            type=raw,value=latest,enable=${{ github.ref_type == 'tag' && github.ref_name == 'master' }}
            type=semver,enable=${{ github.ref_type == 'tag' }},pattern={{major}}
            type=semver,enable=${{ github.ref_type == 'tag' }},pattern={{major}}.{{minor}}
            type=semver,enable=${{ github.ref_type == 'tag' }},pattern={{version}}

      - name: Login to Github Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ secrets.GHCR_USERNAME }}
          password: ${{ secrets.GHCR_TOKEN }}

      - name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          registry: docker.io
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - 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") \
            $(printf '${{ matrix.image }}@sha256:%s ' *)

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