name: run Docker CD

on:
  push:
    tags:
      - "v*.*.*"
  workflow_dispatch:
    inputs:
      tag:
        description: "Test scenario tag"
        required: true
        default: "test"
      set-latest-tag:
        description: "Also set the 'latest' tag with this run? (y/n)"
        required: true
        default: "n"

env:
  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules

jobs:
  build:
    name: CD build docker and push to DockerHub
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: handle manual workflow start and prepare docker image tag(s)
        id: docker-tags
        shell: bash
        run: |
          if [[ "x${{ github.event.inputs.tag }}" != "x" ]]; then
            echo "Workflow started via workflow_dispatch! Parameters: tag=${{ github.event.inputs.tag }}, set-latest-tag=${{ github.event.inputs.set-latest-tag }}"
            tag="${{ github.event.inputs.tag }}"
          else
            echo "Workflow started via push with tag! Complete tag: ${GITHUB_REF:10}"
            tag="${GITHUB_REF:11}"
          fi

          if [[ "x${{ github.event.inputs.set-latest-tag }}" == "xy" || "x${{ github.event.inputs.tag }}" == "x" ]]; then
            tags="${{ secrets.DOCKERHUB_USERNAME }}/greeter-webapi:$tag, ${{ secrets.DOCKERHUB_USERNAME }}/greeter-webapi:latest"
            echo "Docker image release tags: $tags"
          else
            tags="${{ secrets.DOCKERHUB_USERNAME }}/greeter-webapi:$tag"
            echo "Docker image release tag: $tags"
          fi

          echo ::set-output name=tags::$tags

      #
      # configure and build in GitHub CI as smoke test

      # speed up configure step by installing boost as system lib, also use Ninja for faster builds
      - name: speed up configure and build
        shell: bash
        run: sudo apt-get update && sudo apt-get install -y libboost-all-dev ninja-build

      # use GitHub cache to cache dependencies
      - uses: actions/cache@v2
        with:
          path: "**/cpm_modules"
          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}

      - name: configure
        run: cmake -S standalone -B build -G Ninja -D CMAKE_BUILD_TYPE=Release

      - name: build
        run: cmake --build build

      #
      # end GitHub CI local build

      - name: set up Docker Buildx for multi-platform support
        uses: docker/setup-buildx-action@v1

      - name: set up QEMU for multi-platform support
        uses: docker/setup-qemu-action@v1

      - name: login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: build Docker image and push to DockerHub
        uses: docker/build-push-action@v2
        with:
          file: ./standalone/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.docker-tags.outputs.tags }}
          cache-from: type=gha
          cache-to: type=gha,mode=max