publish.yaml

name: Publish Docker image
on:
  push:
    branches:
      - master
    tags:
      - v*
jobs:
  push_to_registries:
    name: Push Docker image to Dockerhub
    runs-on: ubuntu-latest
    env:
      DOCKER_REGISTRY: docker.io
      DOCKER_IMAGE: mrjoshlab/udp2grpc
      DOCKER_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
      DOCKER_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
      DOCKER_TARGET_PLATFORM: linux/amd64,linux/arm64,linux/arm/v7
    steps:
      - name: Check out the repo
        uses: actions/checkout@v2

      - name: Set up Docker Buildx
        uses: crazy-max/ghaction-docker-buildx@v2
        with:
          version: latest

      - name: Prepare
        if: success()
        id: prepare
        run: |
          echo ::set-output name=docker_platform::${DOCKER_TARGET_PLATFORM}
          echo ::set-output name=docker_image::${DOCKER_REGISTRY}/${DOCKER_IMAGE}
          echo ::set-output name=release_version::${GITHUB_REF#refs/*/}
      - name: Login to DockerHub
        if: success()
        run: |
          echo "${DOCKER_TOKEN}" | docker login ${DOCKER_REGISTRY} --username "${DOCKER_USERNAME}" --password-stdin
      - name: Run Buildx (push image)
        if: success()
        run: |
          docker buildx build \
          --platform ${{ steps.prepare.outputs.docker_platform }} \
          --tag ${{ steps.prepare.outputs.docker_image }}:latest \
          --tag ${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.release_version }} \
          --file ./Dockerfile \
          --output type=image,push=true .