docker.yml

name: Docker

# Builds the Dockerfile and checks that the installed AMReX is usable from a
# downstream CMake project. Runs when the image definition changes, and on
# demand.

on:
  push:
    branches: [development]
    paths:
      - 'Dockerfile'
      - '.dockerignore'
      - '.github/workflows/docker.yml'
  pull_request:
    paths:
      - 'Dockerfile'
      - '.dockerignore'
      - '.github/workflows/docker.yml'
  workflow_dispatch:

concurrency:
  group: ${{ github.ref }}-${{ github.head_ref }}-docker
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  build:
    name: Build image and link against it
    runs-on: ubuntu-latest
    timeout-minutes: 90

    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - name: Build the image
        run: docker build -t amrex:ci --build-arg BUILD_JOBS=4 .

      - name: Write a downstream project
        run: |
          mkdir -p smoke
          cat > smoke/main.cpp <<'EOF'
          #include <AMReX.H>
          int main (int argc, char* argv[])
          {
              amrex::Initialize(argc, argv);
              amrex::Finalize();
              return 0;
          }
          EOF
          cat > smoke/CMakeLists.txt <<'EOF'
          cmake_minimum_required(VERSION 3.25)
          # C as well as CXX: AMReXConfig.cmake asks for the C and CXX MPI
          # components whenever AMReX was built with MPI, so a CXX-only
          # project fails to find MPI_C.
          project(smoke C CXX)
          find_package(AMReX REQUIRED)
          add_executable(smoke main.cpp)
          target_link_libraries(smoke PUBLIC AMReX::amrex)
          EOF

      - name: Link it against the installed AMReX
        run: |
          docker run --rm -v "$PWD/smoke:/smoke:ro" amrex:ci \
            bash -c 'cmake -S /smoke -B /tmp/build && cmake --build /tmp/build -j 4 && test -x /tmp/build/smoke'