main.yml

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: [ "*" ]
    tags: [ "*" ]
  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
      - 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: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
         images: ubcctlt/barman
         # generate Docker tags based on the following events/attributes
         tags: |
           type=schedule
           type=ref,event=branch
           type=ref,event=pr
           type=ref,event=tag
           type=semver,pattern={{version}}
           type=semver,pattern={{major}}.{{minor}}
           type=semver,pattern={{major}}
           type=sha

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

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          context: ./
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request'  }}
          tags: ${{ steps.meta.outputs.tags  }}
          labels: ${{ steps.meta.outputs.labels  }}

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