# ref: https://docs.docker.com/ci-cd/github-actions/
# https://blog.oddbit.com/post/2020-09-25-building-multi-architecture-im/

name: docker

on: 
  push:
    branches:
    - master
    tags:
    - 'v*'

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - name: Prepare
      id: prepare
      run: |
        DOCKER_IMAGE=${{ secrets.DOCKER_IMAGE }}
        VERSION=latest

        # If this is git tag, use the tag name as a docker tag
        if [[ $GITHUB_REF == refs/tags/* ]]; then
          VERSION=${GITHUB_REF#refs/tags/v}
        fi
        TAGS="${DOCKER_IMAGE}:${VERSION}"

        # If the VERSION looks like a version number, assume that
        # this is the most recent version of the image and also
        # tag it 'latest'.
        if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
          TAGS="$TAGS,${DOCKER_IMAGE}:latest"
        fi

        # Set output parameters.
        echo ::set-output name=tags::${TAGS}
        echo ::set-output name=docker_image::${DOCKER_IMAGE}
        echo ::set-output name=docker_platforms::linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/s390x

      # https://github.com/crazy-max/ghaction-docker-buildx
    - name: Set up Docker Buildx
      id: buildx
      uses: crazy-max/ghaction-docker-buildx@v1
      with:
        version: latest

    - name: Environment
      run: |
        echo home=$HOME
        echo git_ref=$GITHUB_REF
        echo git_sha=$GITHUB_SHA
        echo version=${{ steps.prepare.outputs.version }}
        echo image=${{ steps.prepare.outputs.docker_image }}
        echo platforms=${{ steps.prepare.outputs.docker_platforms }}
        echo avail_platforms=${{ steps.buildx.outputs.platforms }}

      # https://github.com/actions/checkout
    - name: Checkout
      uses: actions/checkout@v4

    - name: Docker Buildx (no push)
      run: |
        docker buildx bake \
          --set ${{ github.event.repository.name }}.platform=${{ steps.prepare.outputs.docker_platforms }} \
          --set ${{ github.event.repository.name }}.output=type=image,push=false \
          --set ${{ github.event.repository.name }}.tags="${{ steps.prepare.outputs.tags }}" \
          --file docker-compose.yaml

    - name: Docker Login
      if: success()
      env:
        DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
      run: |
        echo "${DOCKER_PASSWORD}" | docker login --username "${{ secrets.DOCKER_USERNAME }}" --password-stdin

    - name: Docker Buildx (push)
      if: success()
      run: |
        docker buildx bake \
          --set ${{ github.event.repository.name }}.platform=${{ steps.prepare.outputs.docker_platforms }} \
          --set ${{ github.event.repository.name }}.output=type=image,push=true \
          --set ${{ github.event.repository.name }}.tags="${{ steps.prepare.outputs.tags }}" \
          --file docker-compose.yaml

    - name: Clear
      if: always()
      run: |
        rm -f ${HOME}/.docker/config.json