main-tag.yml

name: Build multiarch image - tag

on:
  push:
    tags:
      - '[0-9]+.[0-9]+'
    
  workflow_dispatch:
  
jobs:
  build:
    runs-on: ubuntu-latest
    if: "!contains(github.event.head_commit.message, '[ci-skip]')"
    steps:

      - name: Get latest tag
        id: vars
        run: echo ::set-output name=tag::${GITHUB_REF:10}

      - name: Checkout
        uses: actions/checkout@v2
        with:
          ref: ${{ steps.vars.outputs.tag }}

      - name: Prepare
        id: prep
        run: |
          BUILD_DATE=$(date --rfc-3339=seconds --utc)
          echo ::set-output name=build_date::${BUILD_DATE}
          PLATFORMS=amd64,arm,arm64
          TAGS1="quay.io/${{ github.repository_owner }}/echoserver:${{ steps.vars.outputs.tag }}"
          if [ "${{github.event_name}}" == "pull_request" ]; then
                echo ::set-output name=push::false
              else
                echo ::set-output name=push::true
                echo ::set-output name=tags1::${TAGS1}
                echo ::set-output name=branch::${GIT_BRANCH}
          fi
          echo ::set-output name=platforms::${PLATFORMS}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
        with:
          platforms: ${{ steps.prep.outputs.platforms }}

      - name: Login to Quay.io
        uses: docker/login-action@v1
        if: github.event_name != 'pull_request'
        with:
          registry: quay.io
          username: ${{ secrets.QUAY_USERNAME }}
          password: ${{ secrets.QUAY_TOKEN }}

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1
        with:
          install: true
          version: latest
          driver-opts: image=moby/buildkit:latest

      - name: Build and push (echoserver)
        uses: docker/build-push-action@v2
        with:
          labels: |
            org.opencontainers.image.created=${{ steps.prep.outputs.build_date }}
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          file: Dockerfile
          platforms: ${{ steps.prep.outputs.platforms }}
          push: ${{ steps.prep.outputs.push }}
          tags: ${{ steps.prep.outputs.tags1 }}