Hello,

I would like to suggest adding a new CMake variable (e.g. NPM_CMAKEJS) to the set of variables defined by CMake.js when configuring the project. (i.e. something like D.push({"NPM_CMAKEJS": "TRUE"}); in cMake.js)

This would indicate that CMake has been invoked by CMake.js. (as opposed to a call from the command line or by an IDE such as CLion)

Having such a variable allows more flexibility in the CMakeLists.txt. For instance, when working on a complex project, it can be used to switch between sub-projects:

if (NPM_CMAKEJS)
    add_subdirectory(node_addon)
else()
    add_subdirectory(other_subproject)
endif()

Thanks :)