I am trying to list files in subdirectory with a specific pattern using CMake…

function(ListFilesInSubmodule directory_path pattern)
    if(DEFINED WIN32)
        execute_process(COMMAND powershell -c 'Get-ChildItem -Path "${directory_path}" -Recurse -Filter "${pattern}" -File | ForEach-Object { Write-Host $_.FullName }'
        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
        OUTPUT_VARIABLE _Files
        OUTPUT_STRIP_TRAILING_WHITESPACE
        )
    else()
        execute_process(COMMAND bash -c "find '${directory_path}' -type f -name '${pattern}'"
            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
            OUTPUT_VARIABLE _Files
            OUTPUT_STRIP_TRAILING_WHITESPACE
        )
    endif()

    if(NOT _Files)
            message(STATUS "No files found matching pattern '${pattern}' in '${directory_path}'.")
    else()
        string(REPLACE "n" ";" _FilesList ${_Files})
        foreach(_file IN LISTS _FilesList)
            if(EXISTS "${CMAKE_SOURCE_DIR}/${_file}")
                set(PLUGIN_STRUCTURES
                    ${PLUGIN_STRUCTURES}
                    "${_file}"
                    PARENT_SCOPE
                )
                message(STATUS "File is found '${_file}'.")
            else()
                message(WARNING "File is possibly not found '${_file}'.")
            endif()
        endforeach()
    endif()
endfunction()

i tried the function like this

ListFilesInSubmodule("libs/subhook" "*.c")
ListFilesInSubmodule("libs/subhook" "*.h")

message(STATUS "PLUGIN_STRUCTURES : ${PLUGIN_STRUCTURES}")

and it almost works but the target variable is set to the last file’s name only not all of them as expected

I tried to set a separate variable like

    else()
        string(REPLACE "n" ";" _FilesList ${_Files})
        foreach(_file IN LISTS _FilesList)
            if(EXISTS "${CMAKE_SOURCE_DIR}/${_file}")
                set(_Temp ${_Temp} "${_file}")
                message(STATUS "File is found '${_file}'.")
            else()
                message(WARNING "File is possibly not found '${_file}'.")
            endif()
        endforeach()
    endif()
    set(PLUGIN_STRUCTURES
        ${_Temp}
        PARENT_SCOPE
    )

but it didn’t work either…