docker.yml

# Build docker images with a Jupyter server with Cadabra
# kernel whenever a commit is pushed to github.
#
# Lint this thing with
#
#   yq eval docker.yml

name: Docker

# on: [push]

on:
  release:
    types: [created]

jobs:
  build:
    runs-on: ubuntu-latest

#     strategy:
#       fail-fast: false
#       matrix:
#         arch:
#           - amd64
#           - arm64

    steps:
    - name: Prepare
      run: |
        platform=${{ matrix.platform }}
        echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV          

    - name: Set up QEMU
      uses: docker/setup-qemu-action@master

    - uses: actions/checkout@v3

#     - name: Exit if not on master branch
#       if: github.ref != 'refs/heads/master'
#       run: exit 1
      
    - name: Log in to Docker Hub
      uses: docker/login-action@master
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_PASSWORD }}

    - name: Extract metadata (tags, labels) for Docker
      id: meta
      uses: docker/metadata-action@master
      with:
        images: kpeeters/cadabra2-jupyter

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

    - name: Build Docker image
      uses: docker/build-push-action@master
      with:
        platforms: linux/amd64, linux/arm64
        context: .
        file: docker/Dockerfile
        push: true
#${{ github.ref == 'master' }}
        labels: ${{ steps.meta.outputs.labels }}
        tags:   kpeeters/cadabra2-jupyter:latest
#        outputs: type=docker

#     - name: Upload artifact to github assets
#       uses: actions/upload-artifact@main
#       with:
#         name: cadabra2-jupyter-${{ matrix.arch }}
#         path: cadabra2-jupyter-${{ matrix.arch }}.tar