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CMake: init/update a Git submodule and add_subdirectory()
cmake_minimum_required(VERSION 3.19)
function(add_git_submodule dir)
# add a Git submodule directory to CMake, assuming the
# Git submodule directory is a CMake project.
#
# Usage: in CMakeLists.txt
#
# include(AddGitSubmodule.cmake)
# add_git_submodule(mysubmod_dir)
find_package(Git REQUIRED)
if(NOT EXISTS ${dir}/CMakeLists.txt)
execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive -- ${dir}
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
COMMAND_ERROR_IS_FATAL ANY)
endif()
add_subdirectory(${dir})
endfunction(add_git_submodule)
@adi-g15
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adi-g15 commented Jun 30, 2021

Thanks for the gist 🙂🙏
I was searching for how to do this in cmakelists if user missed recursively cloning.

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