build.yml

name: Build and publish the docker images
on:
  push:
    branches:
      - master
    tags:
      - "v*"
  pull_request:
    types:
      - opened
      - reopened
      - synchronize

jobs:
  configure:
    name: Preliminary configuration
    runs-on: ubuntu-latest
    outputs:
      ref: ${{ steps.configure.outputs.ref }}
      repo-suffix: ${{ steps.configure.outputs.repo-suffix }}
      repo-push: ${{ steps.configure.outputs.repo-push }}
      version: ${{ steps.version.outputs.version }}

    steps:
      - name: Get version
        id: version
        run: echo "::set-output name=version::${GITHUB_REF/refs\/tags\//}"
        if: |
          github.event_name == 'push' &&
          github.event.repository.full_name == github.repository &&
          startsWith(github.ref, 'refs/tags/v')

      - name: Configure
        id: configure
        env:
          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
        run: |
          # The ref of the commit to checkout (do not use the merge commit if pull request)
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            echo "::set-output name=ref::${{ github.event.pull_request.head.sha }}"
          elif [[ "${{ steps.version.outputs.version }}" != "" ]]; then
            echo "::set-output name=ref::${{ steps.version.outputs.version }}"
          else
            echo "::set-output name=ref::${{ github.sha }}"
          fi

          # The suffix to append to the repository name if not triggered by a push for a release
          [[ "${{ steps.version.outputs.version }}" == "" ]] && \
            echo "::set-output name=repo-suffix::-dev" || \
            echo "::set-output name=repo-suffix::"

          # Do not push the resulting images to DockerHub if triggered by a pull request or DockerHub credentials are not available
          [[ "${{ github.event_name }}" == "pull_request" || -z $DOCKER_USERNAME ]] && \
            echo "::set-output name=repo-push::false" || \
            echo "::set-output name=repo-push::true"


  build:
    name: Build
    runs-on: ubuntu-latest
    needs: configure

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          ref: ${{ needs.configure.outputs.ref }}
          persist-credentials: false

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

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
        if: needs.configure.outputs.repo-push == 'true'

      - name: Configure the build-push-action parameters
        id: parameters
        env:
          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
        run: |
          echo "::set-output name=repo-owner::${DOCKER_USERNAME:-crownlabs}"
          echo "::set-output name=repo-name::faveo${{ needs.configure.outputs.repo-suffix }}"

      - name: Build and Push the Faveo image
        uses: docker/build-push-action@v2
        with:
          tags: |
            ${{ steps.parameters.outputs.repo-owner }}/${{ steps.parameters.outputs.repo-name }}:${{ needs.configure.outputs.ref }}
          push: ${{ needs.configure.outputs.repo-push }}
          context: .