qp-demo/.github/workflows/docker-pull.yml

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

name: docker-pull

# Controls when the action will run. 
on:
  # Triggers the workflow on push or pull request events but only for the master branch
  push:
    branches: 
    - master
    - release_*
    - github-action-test

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# 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

    # 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
      - uses: actions/checkout@v2

      - name: Login to Docker Hub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1

      - name: Extract branch name
        shell: bash
        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
        id: extract_branch

      - name: Get Docker tag from branch name
        id: extract_docker_tag
        shell: bash
        run: |
          if [ "${{ steps.extract_branch.outputs.branch }}" == "master" ]; then
            echo "##[set-output name=tag;]$(echo 'latest')"
          elif [[ "${{ steps.extract_branch.outputs.branch }}" == release_* ]]; then
            echo "##[set-output name=tag;]$(echo '${{ steps.extract_branch.outputs.branch }}' | cut -d '_' -f2-)"
          else
            echo "##[set-output name=tag;]$(echo 'ghtest')"
          fi
      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          context: ./
          file: ./Dockerfile
          push: true
          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/qp_demo:${{ steps.extract_docker_tag.output.tag }}

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}