name: CMake Versions CI

on:
  pull_request:
  push:
    branches:
      - master
      - develop
      - feature/**
    tags: ['**']
  workflow_dispatch:
    inputs:
      branch:
        description: 'Boost branch to run for'
        required: false
        default: 'auto'
        options:
          - auto
          - master
          - develop

jobs:
  posix:
    strategy:
      fail-fast: false
      matrix:
        enable_test: [ON, OFF]
        cmake_version:
          - 3.8.2
          - 3.9.6
          - 3.10.3
          - 3.11.4
          - 3.12.4
          - 3.13.5
          - 3.14.7
          - 3.15.7
          - 3.16.9
          - 3.17.5
          - 3.18.6
          - 3.19.8
          - 3.20.6
          - 3.21.7
          - 3.22.6
          - 3.23.5
          - 3.24.4
          - 3.25.3
          - 3.26.6
          - 3.27.9
          - 3.28.6
          - 3.29.9
          - 3.30.9
          - 3.31.9
          - 4.0.4
          - 4.1.2

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
      - name: Setup Boost
        run: |
          BOOST_BRANCH="${{inputs.branch}}"
          if [[ -z $BOOST_BRANCH || $BOOST_BRANCH == "auto" ]]; then
              REF=${GITHUB_BASE_REF:-$GITHUB_REF}
              REF=${REF#refs/heads/}
              echo REF: $REF
              [[ "$REF" == "master" ]] && BOOST_BRANCH=master || BOOST_BRANCH=develop
          fi
          echo BOOST_BRANCH: $BOOST_BRANCH
          cd ..
          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
          cd boost-root
          git submodule update --init --jobs 3 
          rm -rf tools/cmake/*
          cp -r $GITHUB_WORKSPACE/* tools/cmake

      - name: Cache CMake
        id: cache-cmake
        uses: actions/cache@v4
        with:
          path: /tmp/cmake
          key: ${{ runner.os }}-cmake-${{matrix.cmake_version}}

      - name: Install CMake dependencies
        run: sudo apt-get -o Acquire::Retries=3 -y -q --no-install-suggests --no-install-recommends install curl libcurl4-openssl-dev libarchive-dev

      - name: Build CMake
        if: steps.cache-cmake.outputs.cache-hit != 'true'
        run: |
            version=${{matrix.cmake_version}}
            filename="cmake-$version.tar.gz"
            cd "$(mktemp -d)"
            wget https://cmake.org/files/v${version%.*}/$filename
            tar -xf $filename --strip-components=1
            flags=(
              "-DCMAKE_BUILD_TYPE=Release"
              "-DCMAKE_INSTALL_PREFIX=/tmp/cmake"
              "-B" "__build"
              "-Wno-dev"  # Make configuring more silent
              "-DCMAKE_USE_SYSTEM_CURL=1"  # Avoid failures caused by newer (system) OpenSSL in CMake < 3.10
              "-DCMAKE_CXX_FLAGS='-include cstdint -include limits'"  # Fix missing includes in CMake < 3.10
            )
            cmake "${flags[@]}" .
            cmake --build __build -- -j 3
            cmake --build __build --target install

      - name: Configure Boost with CMake ${{matrix.cmake_version}}
        working-directory: ../boost-root
        run: |
          version_greater_equal() { printf '%s\n' "$2" "$1" | sort --check=quiet --version-sort; }
          excluded=()
          for cml in "$PWD"/libs/*/CMakeLists.txt "$PWD"/libs/numeric/*/CMakeLists.txt; do
            lib=$(dirname "${cml#*libs/}")
            if minimal_cmake_version=$(grep "cmake_minimum_required" "$cml" | grep -Eo '[0-9]\.[0-9]+' | head -1); then
              version_greater_equal ${{matrix.cmake_version}} "$minimal_cmake_version" || excluded+=("$lib")
            else
              echo "Minimum required CMake version not found in $cml for library $lib"
            fi
          done
          # Libraries that don't declare their correct minimal required CMake version or where dependencies require higher version
          # Example: version_greater_equal ${{matrix.cmake_version}} 3.12.0 || excluded+=("name")
          /tmp/cmake/bin/cmake --version
          /tmp/cmake/bin/cmake -DBUILD_TESTING=${{matrix.enable_test}} -DBOOST_EXCLUDE_LIBRARIES="$(IFS=';'; echo "${excluded[*]}")" -B "__build_cmake-$version" .