docker_check.yml

# GitHub actions workflow which builds the docker images.
# This is useful as it will run in PRs that change the Dockerfile, and can be
# an early source of warnings that the Dockerfile isn't right.
# This check also triggers when this file itself is modified.

name: Check Docker image can be built successfully

on:
  push:
    paths:
      - 'docker/Dockerfile'
      - '.github/workflows/docker_check.yml'

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Set up QEMU
        id: qemu
        uses: docker/setup-qemu-action@v1
        with:
          platforms: arm64

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

      - name: Inspect builder
        run: docker buildx inspect

      # we explicitly check out the repository (and use `context: .` in buildx)
      # because we need to preserve the git metadata so that setuptools_scm
      # (part of build system config in pyproject.toml) can deduce the package version.
      # See: https://github.com/marketplace/actions/build-and-push-docker-images#path-context
      - name: Checkout
        uses: actions/checkout@v3

      - name: Build all platforms
        uses: docker/build-push-action@v2
        with:
          context: .
          push: false
          labels: "gitsha1=${{ github.sha }}"
          file: "docker/Dockerfile"
          platforms: linux/amd64,linux/arm64