CMake-minimal-version.yaml

name: CMake minimal version
# The aim of this test derminate minimal supported CMake version for LibRS project
# and check if it equlas to expected minimal CMAke version

on:
  push:
  pull_request:
  
env:
  EXPECTED_CMAKE_VERSION: "VERSION 3.8.0"

jobs:
  test_downloader:
    name: "Run CMake compatibility tool"
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: "Get current CMake version"
        id: cmake_version
        run: |
          sudo apt-get install  xorg-dev libglu1-mesa-dev
          
          # Go back from RealSense directory to parent directory  
          cd ..
          
          git clone https://github.com/nlohmann/cmake_min_version.git
          cd cmake_min_version
          # We clone a specific commit which we tested the process as working
          git checkout 687dc56e1cf52c865cebf6ac94ad67906d6e1369
          
          python3 -mvenv venv
          venv/bin/pip3 install -r requirements.txt
          venv/bin/python3 cmake_downloader.py --first_minor
          output=$(venv/bin/python3 cmake_min_version.py /home/runner/work/librealsense/librealsense/)
          echo "$output"
          
          # Retrieve CMake minimal version from the last line of the tool output.
          current_cmake_version=$(echo ${output: -30} | cut -d'(' -f 2 | head -c -2)
          # Saving cmake minimal version string in GitHub output
          echo "current_cmake_version=$current_cmake_version" >> $GITHUB_OUTPUT

      - name: "Check minimal CMake version"
        run: |
          if [ "${{steps.cmake_version.outputs.current_cmake_version}}" == "${EXPECTED_CMAKE_VERSION}" ] || [ "${{steps.cmake_version.outputs.current_cmake_version}}" \< "${EXPECTED_CMAKE_VERSION}" ]
          then
            echo "The test PASSED, current CMake version is ${{steps.cmake_version.outputs.current_cmake_version}} and it is not higher than ${EXPECTED_CMAKE_VERSION}"
            exit 0
          else
            echo "Error - LibRS minimal CMake version require is ${EXPECTED_CMAKE_VERSION} but on this build the minimal is ${{steps.cmake_version.outputs.current_cmake_version}}"
            exit 1
          fi