I am trying to generate postscript for crashlytics upload.

basicaly what should be the outcome is this:

however, the DEPENDS to add values to "Input Files" does not seem working,

according to this, it should be done via:
 

set(DWARF_DSYM_FOLDER_PATH "${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}")
set(DWARF_DSYM_FILE "${DWARF_DSYM_FOLDER_PATH}/Contents/Resources/DWARF/${PRODUCT_NAME}")
set(INFO_PLIST "${DWARF_DSYM_FOLDER_PATH}/Contents/Info.plist") set(GOOGLE_SERVICE_INFO_PLIST "$(TARGET_BUILD_DIR)/$(UNLOCALIZED_RESOURCES_FOLDER_PATH)/GoogleService-Info.plist")
set(EXECUTABLE_PATH "$(TARGET_BUILD_DIR)/$(EXECUTABLE_PATH)")

add_custom_command(POST_BUILD
    TARGET ${TARGET_NAME}
    COMMAND /bin/sh -c "${CMAKE_CURRENT_SOURCE_DIR}/../../extralibs/firebase_ios_sdk/FirebaseCrashlytics/run"
    COMMENT "iOS: Processing and uploading dSYM files to Crashlytics"
    DEPENDS ${DWARF_DSYM_FOLDER_PATH} ${DWARF_DSYM_FILE} ${INFO_PLIST} ${GOOGLE_SERVICE_INFO_PLIST} ${EXECUTABLE_PATH}
)

 
but it does not populate the Input Files whatsoever,
also it very much manipulates with the COMMAND i put there:

and for sure it does not give me options to manipulate with other fields from that POST_SCRIPT build phase:

 
therefore currently the only option i see is to wait till project.pbxproj exists and manipulate it manualy via some shell file... which I do but its shady solution and brings even more pain then gain (it reformates, change codings etc, so many things to consider... and each xcode version changes stuff).
 
so isnt there ANY way how to physicaly set/change properties in the that post script block generated from add_custom_command() into project.pbcproj?
currently (for this firebase case) there are properties in that block to be set/modified:
 - shellScript (this is whats being populated from COMMAND
 - alwaysOutOfDate
 - name (default being set as "CMake PostBuild Rules")
 - showEnvVarsInLog
 - inputFiles (which in theory shall be populated by DEPENDS but does not work)