Add config update function (#1379)

Update CMakeLists.txt

FINALLY

dont ignore cmake module directory

move to separate file

very cool feature
tested that this still works

Co-authored-by: Aaron Kimbrell <aronwk.aaron@gmail.com>

.gitignore

@@ -122,3 +122,4 @@ docker/__pycache__
 docker-compose.override.yml
 
 !*Test.bin
+!cmake/*

CMakeLists.txt

@@ -3,6 +3,7 @@ project(Darkflame)
 include(CTest)
 
 set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
 
 # Read variables from file
 FILE(READ "${CMAKE_SOURCE_DIR}/CMakeVariables.txt" variables)
@@ -14,14 +15,13 @@ string(REPLACE "\n" ";" variables ${variables})
 foreach(variable ${variables})
 	# If the string contains a #, skip it
 	if(NOT "${variable}" MATCHES "#")
-
 		# Split the variable into name and value
 		string(REPLACE "=" ";" variable ${variable})
 
 		# Check that the length of the variable is 2 (name and value)
 		list(LENGTH variable length)
-		if(${length} EQUAL 2)
 
+		if(${length} EQUAL 2)
 			list(GET variable 0 variable_name)
 			list(GET variable 1 variable_value)
 
@@ -53,6 +53,7 @@ set(RECASTNAVIGATION_EXAMPLES OFF CACHE BOOL "" FORCE)
 if(UNIX)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++17 -O2 -Wuninitialized -fPIC")
 	add_compile_definitions(_GLIBCXX_USE_CXX11_ABI=0 _GLIBCXX_USE_CXX17_ABI=0)
+
 	if(NOT APPLE)
 		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -lstdc++fs")
 	endif()
@@ -97,11 +98,16 @@ make_directory(${CMAKE_BINARY_DIR}/logs)
 # Copy resource files on first build
 set(RESOURCE_FILES "sharedconfig.ini" "authconfig.ini" "chatconfig.ini" "worldconfig.ini" "masterconfig.ini" "blacklist.dcf")
 message(STATUS "Checking resource file integrity")
+
+include(Utils)
+
 foreach(resource_file ${RESOURCE_FILES})
 	set(file_size 0)
+
 	if(EXISTS ${PROJECT_BINARY_DIR}/${resource_file})
 		file(SIZE ${PROJECT_BINARY_DIR}/${resource_file} file_size)
 	endif()
+
 	if(${file_size} EQUAL 0)
 		configure_file(
 			${CMAKE_SOURCE_DIR}/resources/${resource_file} ${PROJECT_BINARY_DIR}/${resource_file}
@@ -114,30 +120,39 @@ foreach (resource_file ${RESOURCE_FILES})
 		string(REPLACE "\\\n" "" current_file_contents ${current_file_contents})
 		string(REPLACE "\n" ";" current_file_contents ${current_file_contents})
 		set(parsed_current_file_contents "")
+
 		# Remove comment lines so they do not interfere with the variable parsing
 		foreach(line ${current_file_contents})
 			string(FIND ${line} "#" is_comment)
+
 			if(NOT ${is_comment} EQUAL 0)
 				string(APPEND parsed_current_file_contents ${line})
 			endif()
 		endforeach()
+
 		file(READ ${CMAKE_SOURCE_DIR}/resources/${resource_file} depot_file_contents)
 		string(REPLACE "\\\n" "" depot_file_contents ${depot_file_contents})
 		string(REPLACE "\n" ";" depot_file_contents ${depot_file_contents})
 		set(line_to_add "")
+
 		foreach(line ${depot_file_contents})
 			string(FIND ${line} "#" is_comment)
+
 			if(NOT ${is_comment} EQUAL 0)
 				string(REPLACE "=" ";" line_split ${line})
 				list(GET line_split 0 variable_name)
+
 				if(NOT ${parsed_current_file_contents} MATCHES ${variable_name})
 					message(STATUS "Adding missing config option " ${variable_name} " to " ${resource_file})
 					set(line_to_add ${line_to_add} ${line})
+
 					foreach(line_to_append ${line_to_add})
 						file(APPEND ${PROJECT_BINARY_DIR}/${resource_file} "\n" ${line_to_append})
 					endforeach()
+
 					file(APPEND ${PROJECT_BINARY_DIR}/${resource_file} "\n")
 				endif()
+
 				set(line_to_add "")
 			else()
 				set(line_to_add ${line_to_add} ${line})
@@ -145,6 +160,7 @@ foreach (resource_file ${RESOURCE_FILES})
 		endforeach()
 	endif()
 endforeach()
+
 message(STATUS "Resource file integrity check complete")
 
 # if navmeshes directory does not exist, create it
@@ -160,6 +176,7 @@ file(REMOVE ${PROJECT_BINARY_DIR}/navmeshes.zip)
 
 # Copy vanity files on first build
 set(VANITY_FILES "CREDITS.md" "INFO.md" "TESTAMENT.md" "NPC.xml")
+
 foreach(file ${VANITY_FILES})
 	configure_file("${CMAKE_SOURCE_DIR}/vanity/${file}" "${CMAKE_BINARY_DIR}/vanity/${file}" COPYONLY)
 endforeach()
@@ -167,6 +184,7 @@ endforeach()
 # Move our migrations for MasterServer to run
 file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/migrations/dlu/)
 file(GLOB SQL_FILES ${CMAKE_SOURCE_DIR}/migrations/dlu/*.sql)
+
 foreach(file ${SQL_FILES})
 	get_filename_component(file ${file} NAME)
 	configure_file(${CMAKE_SOURCE_DIR}/migrations/dlu/${file} ${PROJECT_BINARY_DIR}/migrations/dlu/${file})
@@ -174,6 +192,7 @@ endforeach()
 
 file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/migrations/cdserver/)
 file(GLOB SQL_FILES ${CMAKE_SOURCE_DIR}/migrations/cdserver/*.sql)
+
 foreach(file ${SQL_FILES})
 	get_filename_component(file ${file} NAME)
 	configure_file(${CMAKE_SOURCE_DIR}/migrations/cdserver/${file} ${PROJECT_BINARY_DIR}/migrations/cdserver/${file})
@@ -313,8 +332,8 @@ endforeach()
 if(NOT WIN32)
 	include_directories("${PROJECT_SOURCE_DIR}/thirdparty/libbcrypt/include/bcrypt")
 endif()
-include_directories("${PROJECT_SOURCE_DIR}/thirdparty/libbcrypt/include")
 
+include_directories("${PROJECT_SOURCE_DIR}/thirdparty/libbcrypt/include")
 
 # Add linking directories:
 link_directories(${PROJECT_BINARY_DIR})

cmake/Utils.cmake

@@ -0,0 +1,47 @@
+# Parses a config file for a specific option and appends the new option if it does not exist
+# If the new option does exist, this function will do nothing.
+# file_name: The name of the file to parse
+# old_option_name: The name of the option to find
+# new_option_name: The name of the option to add
+function(UpdateConfigOption file_name old_option_name new_option_name)
+	string(APPEND old_option_name "=")
+	string(APPEND new_option_name "=")
+	message(STATUS "Checking " ${file_name} " for " ${old_option_name} " and adding " ${new_option_name} " if it does not exist")
+	file(READ ${file_name} current_file_contents)
+	string(REPLACE "\\\n" "" current_file_contents ${current_file_contents})
+	string(REPLACE "\n" ";" current_file_contents ${current_file_contents})
+	set(parsed_current_file_contents "")
+
+	# Remove comment lines so they do not interfere with the variable parsing
+	foreach(line ${current_file_contents})
+		string(FIND ${line} "#" is_comment)
+
+		if(NOT ${is_comment} EQUAL 0)
+			string(APPEND parsed_current_file_contents ${line})
+		endif()
+	endforeach()
+
+	set(found_new_option -1)
+	set(found_old_option -1)
+	set(current_value -1)
+
+	foreach(line ${current_file_contents})
+		string(FIND ${line} ${old_option_name} old_option_in_file)
+
+		if(${old_option_in_file} EQUAL 0)
+			set(found_old_option 1)
+			set(current_value ${line})
+		endif()
+
+		string(FIND ${line} ${new_option_name} found_new_option_in_file)
+
+		if(${found_new_option_in_file} EQUAL 0)
+			set(found_new_option 1)
+		endif()
+	endforeach(line ${current_file_contents})
+
+	if(${found_old_option} EQUAL 1 AND NOT ${found_new_option} EQUAL 1)
+		string(REPLACE ${old_option_name} ${new_option_name} current_value ${current_value})
+		file(APPEND ${file_name} "\n" ${current_value})
+	endif()
+endfunction()