main.yml

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

name: CI to Docker Hub

# Controls when the workflow will run
on:
  # Triggers the workflow on push or pull request events but only for the master branch
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

  # 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
      - name: Checkout
        uses: actions/checkout@v2

      - name: Extract branch name
        id: extract_branch
        run: echo "BRANCH_NAME=$GITHUB_REF_NAME" >> $GITHUB_ENV

      - name: Extract docker tag name
        id: extract_tag
        run: echo "BRANCH_TAG=$(echo ${GITHUB_REF_NAME} | sed 's/[^[:alnum:]\.\_\-]/-/g')" >> $GITHUB_ENV

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v2

      - name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}      

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v3
        with:
          context: ./
          file: ./docker/CI.Dockerfile
          push: true
          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/watershed_workflow-ci:${{ env.BRANCH_TAG }}
          build-args: CI_ENV_DOCKER_TAG=master
          cache-from: type=gha
          cache-to: type=gha,mode=max
          
      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}