docker-build.yaml

name: docker-build
# Most of this action was copied from https://docs.docker.com/build/ci/github-actions/multi-platform/

# Only build base when any of the files in the base directory are modified
on:
  push:
    branches: [master, build_jetson]
    tags:
      - '*'
  workflow_dispatch:
  schedule:
    - cron: '0 0 * * 0'

env:
  REGISTRY_IMAGE: kumarrobotics/dcist-master

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64

    steps:
      -
        name: Free Disk Space
        uses: jlumbroso/free-disk-space@main
        with:
          tool-cache: true
      -
        name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
      -
        name: Checkout
        uses: actions/checkout@v4
      -
        name: Set platform-specific build-args
        id: set_build_args
        run: |
          export $(cat build.bash | grep UPSTREAM_X86_64 | sed 's/^export //')
          export $(cat build.bash | grep UPSTREAM_AARCH64 | sed 's/^export //')
          if [ "${{ matrix.platform }}" = "linux/amd64" ]; then
            echo "upstream_image=$UPSTREAM_X86_64" >> $GITHUB_ENV
          elif [ "${{ matrix.platform }}" = "linux/arm64" ]; then
            echo "upstream_image=$UPSTREAM_AARCH64" >> $GITHUB_ENV
          else
            echo "Architecture not supported"
            exit 1
          fi
      -
        name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: "{{defaultContext}}:dcist-master"
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: upstream_image=${{ env.upstream_image }}
          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
      -
        name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"
      -
        name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1
  merge:
    runs-on: ubuntu-latest
    needs:
      - build
    steps:
      -
        name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
      -
        name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        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.REGISTRY_IMAGE }}@sha256:%s ' *)
      -
        name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}