SubmoduleSetup.cmake

if(NOT IS_GIT_REPO)
    return()
endif()

# This file initializes the required submodules
if(OGS_USE_XDMF)
    list(APPEND REQUIRED_SUBMODULES ThirdParty/xdmf)
endif()
if(OGS_BUILD_SWMM)
    list(APPEND REQUIRED_SUBMODULES ThirdParty/SwmmInterface)
endif()

execute_process(
    COMMAND ${GIT_EXECUTABLE} submodule status
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
    OUTPUT_VARIABLE SUBMODULES_STATE
)
string(REPLACE "\n" ";" SUBMODULES_LIST ${SUBMODULES_STATE})

foreach(SUBMODULE_STATE ${SUBMODULES_LIST})

    string(REGEX MATCH "ThirdParty/[/A-Za-z0-9_-]*" SUBMODULE ${SUBMODULE_STATE})
    if(NOT ${SUBMODULE} IN_LIST REQUIRED_SUBMODULES)
        continue()
    endif()

    string(REGEX MATCH "^\\-" UNINITIALIZED ${SUBMODULE_STATE})
    string(REGEX MATCH "^\\+" MISMATCH ${SUBMODULE_STATE})

    if(IS_CI)
        # Always set submodule to the given state
        execute_process(
            COMMAND ${GIT_EXECUTABLE} submodule update --init --force
                --recursive ${DEPTH} ${SUBMODULE}
            WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
            RESULT_VARIABLE RESULT
        )
    else()
        set(RESULT "")
        if(UNINITIALIZED)
            message(STATUS "Initializing submodule ${SUBMODULE}")
            execute_process(
                COMMAND ${GIT_EXECUTABLE} submodule update --init
                    --recursive ${DEPTH} ${SUBMODULE}
                WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
                RESULT_VARIABLE RESULT
            )

        elseif(MISMATCH)
            message(STATUS "Updating submodule ${SUBMODULE}")
            execute_process(
                COMMAND ${GIT_EXECUTABLE} submodule update
                    --recursive ${SUBMODULE}
                WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
                RESULT_VARIABLE RESULT
            )
        endif()
    endif()

    if((NOT ${RESULT} STREQUAL "") AND (NOT ${RESULT} STREQUAL "0"))
        message(FATAL_ERROR "Error in submodule setup; return value: ${RESULT}")
    endif()
endforeach()