package.yml

# SPDX-License-Identifier: Apache-2.0
name: Package
on: [push, pull_request, merge_group]

concurrency:
  group: package-${{ github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

permissions:
  contents: read

jobs:
  install-and-consume:
    name: install+consume (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ windows-2025, ubuntu-24.04, macos-15 ]
    steps:
      - uses: actions/checkout@v4
      - uses: seanmiddleditch/gha-setup-ninja@v6
      - if: runner.os == 'Windows'
        uses: ilammy/msvc-dev-cmd@v1
        with: { arch: x64 }

      # The library supports only the newest GCC, the same one build.yml pins.
      - name: Install GCC 14
        if: runner.os == 'Linux'
        run: sudo apt-get update && sudo apt-get install -y g++-14 && echo "CXX=g++-14" >> "$GITHUB_ENV"

      # Configured exactly as the vcpkg port does: tests and examples OFF. If the
      # library ever needs Catch2 in order to CONFIGURE, this step fails -- which
      # is the point, because that failure is the port breaking, caught here.
      - name: Configure as the port does
        shell: bash
        run: |
          cmake -S . -B out/pkg -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DFORMULA_BUILD_TESTS=OFF \
            -DFORMULA_BUILD_EXAMPLES=OFF \
            -DFORMULA_INSTALL=ON \
            -DCMAKE_INSTALL_PREFIX="$PWD/stage"

      - name: Install
        run: cmake --install out/pkg

      - name: The installed package leaks nothing
        shell: bash
        run: |
          set -euo pipefail
          cfgdir=stage/lib/cmake/formula-cpp
          find stage -type f | sort
          test -f "$cfgdir/formula-cpp-config.cmake"
          test -f stage/include/formula-cpp/formula.hpp
          if grep -REn 'Catch2|CPM|_deps|FORMULA_BUILD_' "$cfgdir"; then
            echo "::error::installed package references test or dependency machinery"; exit 1
          fi
          # CMake writes generated files with forward slashes on every
          # platform, but $GITHUB_WORKSPACE in bash on the Windows runner is
          # backslash-separated -- a literal comparison never matches there,
          # so this leg would silently assert nothing. Normalise the
          # workspace path to forward slashes before comparing.
          workspace_normalized="${GITHUB_WORKSPACE//\\//}"
          if grep -RFn "$workspace_normalized" "$cfgdir"; then
            echo "::error::installed package bakes in a build-machine path"; exit 1
          fi

      - name: Consume via find_package(CONFIG)
        shell: bash
        run: |
          cmake -S test/package -B out/consume -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DCMAKE_PREFIX_PATH="$PWD/stage"
          cmake --build out/consume
          ctest --test-dir out/consume --output-on-failure

      # A Debug consumer against a Release install. Trivially fine for a
      # header-only library -- which is exactly the claim being checked.
      - name: Consume in a different configuration
        if: runner.os == 'Windows'
        shell: bash
        run: |
          cmake -S test/package -B out/consume-dbg -G Ninja \
            -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH="$PWD/stage"
          cmake --build out/consume-dbg