Print configuration from cmake-js https://github.com/cmake-js/cmake-js/issues/23

CMakeLists.txt

cmake_minimum_required(VERSION 3.2.2)

function(PARSE_CMAKEJS_PROPERTIES)
  function(GET_VARIABLE INPUT_STRING VARIABLE_TO_SELECT OUTPUT_VARIABLE)
    set(SEARCH_STRING "${VARIABLE_TO_SELECT}=\"")
    string(LENGTH "${SEARCH_STRING}" SEARCH_STRING_LENGTH)
    string(LENGTH "${INPUT_STRING}" INPUT_STRING_LENGTH)

    string(FIND "${INPUT_STRING}" "${VARIABLE_TO_SELECT}=\"" SEARCH_STRING_INDEX)

    math(EXPR SEARCH_STRING_INDEX "${SEARCH_STRING_INDEX}+${SEARCH_STRING_LENGTH}")

    string(SUBSTRING "${INPUT_STRING}" ${SEARCH_STRING_INDEX} ${INPUT_STRING_LENGTH} AFTER_SEARCH_STRING)
    string(FIND "${AFTER_SEARCH_STRING}" "\"" QUOTE_INDEX)
    string(SUBSTRING "${AFTER_SEARCH_STRING}" "0" "${QUOTE_INDEX}" RESULT_STRING)
    set("${OUTPUT_VARIABLE}" "${RESULT_STRING}" PARENT_SCOPE)
  endfunction(GET_VARIABLE)

  string(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LOWER)
  if (CMAKE_BUILD_TYPE_LOWER STREQUAL "debug")
    exec_program(./node_modules/.bin/cmake-js ${CMAKE_CURRENT_SOURCE_DIR}
                 ARGS print-configure --debug
                 OUTPUT_VARIABLE CMAKE_JS_OUTPUT
    )
  else()
    exec_program(./node_modules/.bin/cmake-js ${CMAKE_CURRENT_SOURCE_DIR}
                 ARGS print-configure
                 OUTPUT_VARIABLE CMAKE_JS_OUTPUT
    )
  endif ()

  get_variable("${CMAKE_JS_OUTPUT}" "CMAKE_JS_INC" CMAKE_JS_INC)
  set(CMAKE_JS_INC "${CMAKE_JS_INC}" PARENT_SCOPE)

  get_variable("${CMAKE_JS_OUTPUT}" "CMAKE_LIBRARY_OUTPUT_DIRECTORY" CMAKE_LIBRARY_OUTPUT_DIRECTORY)
  set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}" PARENT_SCOPE)

endfunction(PARSE_CMAKEJS_PROPERTIES)

project(rep0st)

parse_cmakejs_properties()

include_directories("${CMAKE_JS_INC}")
file(GLOB SOURCE_FILES "src/*.cc" "src/*.h")
add_library(${PROJECT_NAME} SHARED ${SOURCE_FILES})
set_target_properties(${PROJECT_NAME} PROPERTIES PREFIX "" SUFFIX ".node")
target_link_libraries(${PROJECT_NAME} ${CMAKE_JS_LIB})