name: CI

on:
  push:
    branches:
      - trunk
  pull_request:

permissions:
  contents: read

env:
  FPM_VERSION: "0.13.0"

jobs:
  test:
    name: Test (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - ubuntu-latest
          - macos-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v6

      - name: Set up Linux Fortran toolchain
        if: runner.os != 'macOS'
        run: |
          sudo apt-get update
          sudo apt-get install -y gfortran gcc g++
          echo "FC=$(command -v gfortran)" >> "$GITHUB_ENV"
          echo "CC=$(command -v gcc)" >> "$GITHUB_ENV"
          echo "CXX=$(command -v g++)" >> "$GITHUB_ENV"

      - name: Set up macOS Fortran toolchain
        if: runner.os == 'macOS'
        uses: fortran-lang/setup-fortran@v1
        with:
          compiler: gcc
          version: latest

      - name: Install fpm from official release
        if: runner.os != 'macOS'
        run: |
          asset="fpm-${FPM_VERSION}-linux-x86_64-gcc-12"
          curl -fsSLo "${asset}" "https://github.com/fortran-lang/fpm/releases/download/v${FPM_VERSION}/${asset}"
          curl -fsSLo "${asset}.sha256" "https://github.com/fortran-lang/fpm/releases/download/v${FPM_VERSION}/${asset}.sha256"
          shasum -a 256 -c "${asset}.sha256"
          chmod +x "${asset}"
          mv "${asset}" fpm
          echo "${PWD}" >> "$GITHUB_PATH"

      - name: Install fpm with Homebrew
        if: runner.os == 'macOS'
        run: |
          brew tap fortran-lang/homebrew-fortran
          brew install fpm

      - name: Show tool versions
        run: |
          fpm --version
          "$FC" --version
          "$CC" --version

      - name: Run test suite
        run: fpm test --verbose

      - name: Run examples
        run: fpm run --example --all