2016-07-14 15:36:14 +00:00
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cmake_minimum_required(VERSION 2.8.12.2 FATAL_ERROR)
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function (add_shared_git_project SUBMODULE_PATH)
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if (IS_ABSOLUTE "${SUBMODULE_PATH}")
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set(submod_path "${SUBMODULE_PATH}")
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else()
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set(submod_path "${CMAKE_CURRENT_SOURCE_DIR}/${SUBMODULE_PATH}")
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endif()
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if (NOT EXISTS "${submod_path}")
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message(FATAL_ERROR "Path \"${submod_path}\" doesn't exist")
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endif()
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if (NOT IS_DIRECTORY "${submod_path}")
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message(FATAL_ERROR "Path \"${submod_path}\" is not a valid directory")
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endif()
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if (NOT EXISTS "${submod_path}/.git")
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message(FATAL_ERROR ".git not found in \"${submod_path}\". Not a git submodule?")
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endif()
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if (IS_DIRECTORY "${submod_path}/.git")
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message(FATAL_ERROR "\"${submod_path}.git\" is a directory, not a file as expected. Not a git submodule?")
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endif()
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get_filename_component(proj_name_orig "${submod_path}" NAME)
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if ("${proj_name_orig}" STREQUAL "")
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message(FATAL_ERROR "Couldn't make up a name for given project in \"${submod_path}\"")
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endif()
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2016-07-14 16:01:16 +00:00
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string(MAKE_C_IDENTIFIER "${proj_name_orig}" proj_name_c_id)
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2016-07-14 15:36:14 +00:00
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string(TOUPPER ${proj_name_c_id} proj_name)
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get_property(shared_projects_list GLOBAL PROPERTY SHARED_PROJECTS_LIST)
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list(FIND shared_projects_list ${proj_name} found_index)
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if (${found_index} GREATER -1)
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#nothing to do, the variable is already set so the project must have been
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#included already
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return()
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endif()
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#Obtain the path to the working tree
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# see http://stackoverflow.com/questions/27379818/git-possible-to-use-same-submodule-working-copy-by-multiple-projects
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# git rev-parse --git-dir --show-toplevel
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execute_process(
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COMMAND git rev-parse --show-toplevel
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WORKING_DIRECTORY "${submod_path}"
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OUTPUT_VARIABLE matched_gitdir
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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#Make sure we got an absolute path
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if (IS_ABSOLUTE "${matched_gitdir}")
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set(reported_submodule_dir "${matched_gitdir}")
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else()
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file(RELATIVE_PATH reported_submodule_dir "${CMAKE_CURRENT_SOURCE_DIR}" "${submod_path}/${matched_gitdir}")
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endif()
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unset(matched_gitdir)
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#Check if submodule is a subdirectory of the current source dir
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file(RELATIVE_PATH reported_submodule_rel_path "${CMAKE_CURRENT_SOURCE_DIR}" "${reported_submodule_dir}")
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string(LENGTH "${reported_submodule_rel_path}" rel_path_len)
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if (${rel_path_len} GREATER 2)
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string(SUBSTRING "${reported_submodule_rel_path}" 0 3 first_bit)
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if ("../" STREQUAL "${first_bit}")
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set(is_out_of_dirtree ON)
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else()
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set(is_out_of_dirtree OFF)
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endif()
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unset(first_bit)
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else()
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set(is_out_of_dirtree OFF)
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endif()
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unset(rel_path_len)
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#Globally mark current submodule as handled
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set_property(GLOBAL APPEND PROPERTY SHARED_PROJECTS_LIST ${proj_name})
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set(shared_project_binary "${CMAKE_CURRENT_BINARY_DIR}/shared_projects/${proj_name_orig}")
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if (is_out_of_dirtree)
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#message(FATAL_ERROR "Would call add_subdirectory(\"${reported_submodule_dir}\" \"${shared_project_binary}\")")
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add_subdirectory("${reported_submodule_dir}" "${shared_project_binary}" ${ARGN})
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else()
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#message(FATAL_ERROR "Would call add_subdirectory(\"${reported_submodule_rel_path}\")")
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add_subdirectory("${reported_submodule_rel_path}" ${ARGN})
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endif()
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endfunction()
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