build-docker.yml

name: Build and publish docker images

on:
  push:
    # Publish `master` as Docker `latest` image.
    branches:
      - master
      - development

    # Publish `v1.2.3` tags as releases.
    tags:
      - v*

env:
  IMAGE_NAME: robles
  REGISTRY_IMAGE: razeware/robles

jobs:
  # Run tests.
  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Run tests
        run: |
          if [ -f docker-compose.test.yml ]; then
            docker-compose --file docker-compose.test.yml build
            docker-compose --file docker-compose.test.yml run sut
          else
            docker build . --file Dockerfile
          fi

      - name: Notify slack - test results
        uses: zuplo/github-action-slack-notify-build@v2
        if: failure()
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
        with:
          channel: circleci
          status: FAILED
          color: danger

  notify_slack:
    name: Notify slack of build
    runs-on: ubuntu-latest
    needs:
      - test
    outputs:
      slack_message_id: ${{ steps.slack.outputs.message_id }}
    steps:
      - name: Notify slack - build starting
        uses: zuplo/github-action-slack-notify-build@v2
        if: success()
        id: slack
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
        with:
          channel: build
          status: STARTING
          color: warning

  determine_environment:
    name: Determine environment
    runs-on: ubuntu-latest
    outputs:
      environment: ${{ steps.set_environment.outputs.environment }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set environment
        id: set_environment
        run: |
          if [[ $GITHUB_REF == 'refs/heads/development' ]]; then
            echo "environment=staging" >> $GITHUB_OUTPUT
          # Else if tag starts with v, then it's a release
          elif [[ $GITHUB_REF == 'refs/tags/v'* ]]; then
            echo "environment=production" >> $GITHUB_OUTPUT
          else
            echo "environment=na" >> $GITHUB_OUTPUT
          fi

  # Build the image
  build:
    needs:
      - determine_environment
      - test
      - notify_slack

    if: github.event_name == 'push'

    strategy:
      fail-fast: false
      matrix:
        include:
          - runner: ubuntu-latest
            platform: linux/amd64
          - runner: public-arm-2core
            platform: linux/arm64

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

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.REGISTRY_IMAGE }}
          tags: |
            type=ref,event=tag,prefix=release-
            type=raw,value=latest,enable=${{ github.ref_name == 'master' }}
            type=raw,value=staging,enable=${{ needs.determine_environment.outputs.environment == 'staging' }}

      - uses: actions/checkout@v4

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v3
        with:
          buildkitd-flags: --debug

      - name: Log in to DockerHub registry
        run: echo "${{ secrets.DOCKERHUB_PASSWORD }}" | docker login -u razewareci --password-stdin

      - name: Build and push
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ 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

      - name: Logout of DockerHub Registry
        if: ${{ always() }}
        run: docker logout

      - name: Notify slack - build result failed
        uses: zuplo/github-action-slack-notify-build@v2
        if: failure()
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
        with:
          message_id: ${{ needs.notify_slack.outputs.slack_message_id }}
          channel: build
          status: FAILED
          color: danger

  # Join the two layers back together
  merge:
    runs-on: ubuntu-latest
    needs:
      - determine_environment
      - build
      - notify_slack

    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: |
            ${{ env.REGISTRY_IMAGE }}
          tags: |
            type=ref,event=tag,prefix=release-
            type=raw,value=latest,enable=${{ github.ref_name == 'master' }}
            type=raw,value=staging,enable=${{ needs.determine_environment.outputs.environment == 'staging' }}

      - name: Log in to DockerHub registry
        run: echo "${{ secrets.DOCKERHUB_PASSWORD }}" | docker login -u razewareci --password-stdin

      - 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 }}

      - name: Logout of DockerHub Registry
        if: ${{ always() }}
        run: docker logout

      - name: Notify slack - build result successful
        uses: zuplo/github-action-slack-notify-build@v2
        if: success()
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
        with:
          message_id: ${{ needs.notify_slack.outputs.slack_message_id }}
          channel: build
          status: SUCCESS
          color: good

      - name: Notify slack - build result failed
        uses: zuplo/github-action-slack-notify-build@v2
        if: failure()
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}
        with:
          message_id: ${{ needs.notify_slack.outputs.slack_message_id }}
          channel: build
          status: FAILED
          color: danger