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https://github.com/DarkflameUniverse/DarkflameServer
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48 lines
1.7 KiB
CMake
48 lines
1.7 KiB
CMake
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# Parses a config file for a specific option and appends the new option if it does not exist
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# If the new option does exist, this function will do nothing.
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# file_name: The name of the file to parse
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# old_option_name: The name of the option to find
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# new_option_name: The name of the option to add
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function(UpdateConfigOption file_name old_option_name new_option_name)
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string(APPEND old_option_name "=")
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string(APPEND new_option_name "=")
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message(STATUS "Checking " ${file_name} " for " ${old_option_name} " and adding " ${new_option_name} " if it does not exist")
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file(READ ${file_name} current_file_contents)
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string(REPLACE "\\\n" "" current_file_contents ${current_file_contents})
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string(REPLACE "\n" ";" current_file_contents ${current_file_contents})
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set(parsed_current_file_contents "")
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# Remove comment lines so they do not interfere with the variable parsing
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foreach(line ${current_file_contents})
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string(FIND ${line} "#" is_comment)
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if(NOT ${is_comment} EQUAL 0)
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string(APPEND parsed_current_file_contents ${line})
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endif()
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endforeach()
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set(found_new_option -1)
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set(found_old_option -1)
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set(current_value -1)
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foreach(line ${current_file_contents})
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string(FIND ${line} ${old_option_name} old_option_in_file)
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if(${old_option_in_file} EQUAL 0)
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set(found_old_option 1)
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set(current_value ${line})
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endif()
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string(FIND ${line} ${new_option_name} found_new_option_in_file)
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if(${found_new_option_in_file} EQUAL 0)
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set(found_new_option 1)
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endif()
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endforeach(line ${current_file_contents})
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if(${found_old_option} EQUAL 1 AND NOT ${found_new_option} EQUAL 1)
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string(REPLACE ${old_option_name} ${new_option_name} current_value ${current_value})
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file(APPEND ${file_name} "\n" ${current_value})
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endif()
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endfunction()
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