name: Build docker images

on:
  push:

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      packages: write
    steps:
      - name: checkout code
        uses: actions/checkout@v2

      - name: Get tag name
        shell: bash
        run: |
          BRANCH=$(echo ${GITHUB_REF#refs/heads/});
          if [ -z $BRANCH ]; then
            exit 1;
          elif  [ $BRANCH == "master" ]; then
            BRANCH=latest;
          fi

          echo "##[set-output name=tag;]$(echo $BRANCH)"
        id: tag_name

      # https://github.com/docker/setup-qemu-action
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to docker hub
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Build the image
        run: |
          docker buildx build --push \
          --tag ghcr.io/edenhaus/bumper:${{ steps.tag_name.outputs.tag }} \
          --platform linux/amd64,linux/arm/v7,linux/arm64 .