cmake-action/action.yml

name: CMake Action
description: Configure and build a CMake project
author: Alfi Maulana
branding:
  color: gray-dark
  icon: terminal
inputs:
  source-dir:
    description: Source directory of the CMake project
    required: false
  build-dir:
    description: Build directory of the CMake project
    required: false
  targets:
    description: List of build targets
    required: false
  run-test:
    description: If enabled, run testing using CTest (true/false)
    required: false
    default: false
  generator:
    description: Build system generator of the CMake project
    required: false
  c-compiler:
    description: Preferred executable for compiling C language files
    required: false
  cxx-compiler:
    description: Preferred executable for compiling C++ language files
    required: false
  c-flags:
    description: Additional flags passed when compiling C language files
    required: false
  cxx-flags:
    description: Additional flags passed when compiling C++ language files
    required: false
  args:
    description: Additional arguments passed during the CMake configuration
    required: false
  test-args:
    description: Additional arguments passed during the CTest run
    required: false
runs:
  using: composite
  steps:
    - name: Process the inputs
      id: process_inputs
      shell: bash
      run: |
        SOURCE_DIR="."
        if [ -n '${{ inputs.source-dir }}' ]; then
          SOURCE_DIR="${{ inputs.source-dir }}"
        fi
        BUILD_DIR="build"
        if [ -n '${{ inputs.build-dir }}' ]; then
          BUILD_DIR="${{ inputs.build-dir }}"
        elif [ -n "${{ inputs.source-dir }}" ]; then
          BUILD_DIR="${{ inputs.source-dir }}/build"
        fi
        ARGS="'$SOURCE_DIR' -B '$BUILD_DIR'"
        BUILD_ARGS="--build '$BUILD_DIR'"
        TEST_ARGS=""
        if [ -n '${{ inputs.targets }}' ]; then
          BUILD_ARGS="$BUILD_ARGS --target ${{ inputs.targets }}"
        fi
        if [ '${{ inputs.run-test }}' == 'true' ]; then
          TEST_ARGS="--test-dir '$BUILD_DIR' --output-on-failure --no-tests=error"
        fi
        if [ -n '${{ inputs.generator }}' ]; then
          ARGS="$ARGS -G '${{ inputs.generator }}'"
        fi
        if [ -n '${{ inputs.c-compiler }}' ]; then
          ARGS="$ARGS -D CMAKE_C_COMPILER='${{ inputs.c-compiler }}'"
        fi
        if [ -n '${{ inputs.cxx-compiler }}' ]; then
          ARGS="$ARGS -D CMAKE_CXX_COMPILER='${{ inputs.cxx-compiler }}'"
        fi
        if [ -n '${{ inputs.c-flags }}' ]; then
          ARGS="$ARGS -D CMAKE_C_FLAGS='${{ inputs.c-flags }}'"
        fi
        if [ -n '${{ inputs.cxx-flags }}' ]; then
          ARGS="$ARGS -D CMAKE_CXX_FLAGS='${{ inputs.cxx-flags }}'"
        fi
        if [ -n '${{ inputs.args }}' ]; then
          ARGS="$ARGS ${{ inputs.args }}"
        fi
        if [ -n '${{ inputs.test-args }}' ]; then
          TEST_ARGS="$TEST_ARGS ${{ inputs.test-args }}"
        fi
        echo "cmake_args=${ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
        echo "cmake_build_args=${BUILD_ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT
        echo "cmake_test_args=${TEST_ARGS//[$'\t\r\n']}" >> $GITHUB_OUTPUT        

    - name: Install Ninja
      if: ${{ inputs.generator == 'Ninja' }}
      shell: bash
      run: |
        case "$OSTYPE" in
          darwin*)  brew install ninja ;;
          linux*)   sudo apt install -y ninja-build ;;
          *)        choco install ninja ;;
        esac        

    - name: Configure the CMake project
      shell: ${{ runner.os == 'Windows' && 'pwsh' || 'bash' }}
      run: cmake ${{ steps.process_inputs.outputs.cmake_args }}

    - name: Build targets
      shell: ${{ runner.os == 'Windows' && 'pwsh' || 'bash' }}
      run: cmake ${{ steps.process_inputs.outputs.cmake_build_args }}

    - name: Run tests
      if: steps.process_inputs.outputs.cmake_test_args != ''
      shell: ${{ runner.os == 'Windows' && 'pwsh' || 'bash' }}
      run: ctest ${{ steps.process_inputs.outputs.cmake_test_args }}