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++ # Copyright (C) 2022 The Qt Company Ltd.
++ # SPDX-License-Identifier: BSD-3-Clause
++
++ # This script writes its arguments to the file determined by OUT_FILE.
++ # Each argument appears on a separate line.
++ # This is used for writing the config.opt file.
++ #
++ # This script takes the following arguments:
++ # IN_FILE: The input file. The whole command line as one string, or one argument per line.
++ # REDO_FILE: A file containing extra commands to be joined with IN_FILE.
++ # OUT_FILE: The output file. One argument per line.
++ # SKIP_ARGS: Number of arguments to skip from the front of the arguments list.
++ # SKIP_REDO_FILE_ARGS: Number of arguments to skip from the front of the redo file arguments list.
++ # IGNORE_ARGS: List of arguments to be ignored, i.e. that are not written.
++ #
++ # If the REDO_FILE is given, its parameters will be merged with IN_FILE parameters
++ # and be written into the OUT_FILE.
++
++ cmake_minimum_required(VERSION 3.16)
++
++ # Read arguments from IN_FILE and separate them.
++ file(READ "${IN_FILE}" raw_args)
++ # To catch cases where the path ends with an `\`, e.g., `-prefix "C:\Path\"`
++ string(REPLACE "\\\"" "\"" raw_args "${raw_args}")
++ string(REPLACE ";" "[[;]]" raw_args "${raw_args}")
++
++ separate_arguments(args NATIVE_COMMAND "${raw_args}")
++
++ string(REPLACE "\;" ";" args "${args}")
++ string(REPLACE "[[;]]" "\;" args "${args}")
++
++ if(DEFINED REDO_FILE)
++ file(READ "${REDO_FILE}" raw_redo_args)
++ separate_arguments(redo_args NATIVE_COMMAND "${raw_redo_args}")
++ if(DEFINED SKIP_REDO_FILE_ARGS)
++ foreach(i RANGE 1 ${SKIP_REDO_FILE_ARGS})
++ list(POP_FRONT redo_args)
++ endforeach()
++ endif()
++
++ if(args)
++ list(FIND args "--" args_ddash_loc)
++ list(FIND redo_args "--" redo_ddash_loc)
++ if("${redo_ddash_loc}" STREQUAL "-1")
++ if("${args_ddash_loc}" STREQUAL "-1")
++ list(LENGTH args args_ddash_loc)
++ endif()
++ # Avoid adding an empty line for an empty -redo
++ if(NOT "${redo_args}" STREQUAL "")
++ list(INSERT args ${args_ddash_loc} "${redo_args}")
++ endif()
++ else()
++ # Handling redo's configure options
++ list(SUBLIST redo_args 0 ${redo_ddash_loc} redo_config_args)
++ if(redo_config_args)
++ if("${args_ddash_loc}" STREQUAL "-1")
++ list(APPEND args "${redo_config_args}")
++ else()
++ list(INSERT args ${args_ddash_loc} "${redo_config_args}")
++ endif()
++ endif()
++
++ # Handling redo's CMake options
++ list(LENGTH redo_args redo_args_len)
++ math(EXPR redo_ddash_loc "${redo_ddash_loc} + 1")
++ # Catch an unlikely case of -redo being called with an empty --, ie., `-redo --`
++ if(NOT ${redo_ddash_loc} STREQUAL ${redo_args_len})
++ list(SUBLIST redo_args ${redo_ddash_loc} -1 redo_cmake_args)
++ endif()
++
++ if(DEFINED redo_cmake_args)
++ if("${args_ddash_loc}" STREQUAL "-1")
++ list(APPEND args "--")
++ endif()
++ list(APPEND args "${redo_cmake_args}")
++ endif()
++ endif()
++ else()
++ list(APPEND args "${redo_args}")
++ endif()
++ endif()
++
++ # Skip arguments if requested
++ if(DEFINED SKIP_ARGS)
++ foreach(i RANGE 1 ${SKIP_ARGS})
++ list(POP_FRONT args)
++ endforeach()
++ endif()
++
++ # Write config.opt
++ set(content "")
++ foreach(arg IN LISTS args)
++ if(NOT arg IN_LIST IGNORE_ARGS)
++ string(APPEND content "${arg}\n")
++ endif()
++ endforeach()
++
++ file(WRITE "${OUT_FILE}" "${content}")