Do post configure function(s) more generically

CMakeLists.txt

@@ -81,4 +81,5 @@ include(client)
 include(basegame)
 include(missionpack)
 
+include(post_configure)
 include(installer)

cmake/client.cmake

@@ -108,7 +108,3 @@ foreach(LIBRARY IN LISTS CLIENT_DEPLOY_LIBRARIES)
         # install() requires a relative path hence:
         $<PATH:RELATIVE_PATH,$<TARGET_FILE_DIR:${CLIENT_BINARY}>,${CMAKE_BINARY_DIR}/$<CONFIG>>)
 endforeach()
-
-if(POST_CLIENT_CONFIGURE_FUNCTION)
-    cmake_language(CALL ${POST_CLIENT_CONFIGURE_FUNCTION})
-endif()

cmake/platforms/emscripten.cmake

@@ -35,7 +35,7 @@ if(EMSCRIPTEN_PRELOAD_FILE)
     list(APPEND CLIENT_LINK_OPTIONS --preload-file "${BASEGAME}")
 endif()
 
-set(POST_CLIENT_CONFIGURE_FUNCTION deploy_shell_files)
+list(APPEND POST_CONFIGURE_FUNCTIONS deploy_shell_files)
 
 function(deploy_shell_files)
     configure_file(${SOURCE_DIR}/web/client.html.in

cmake/platforms/macos.cmake

@@ -19,7 +19,7 @@ set(CMAKE_OSX_ARCHITECTURES arm64;x86_64)
 
 if(BUILD_MACOS_APP)
     set(CLIENT_EXECUTABLE_OPTIONS MACOSX_BUNDLE)
-    set(POST_CLIENT_CONFIGURE_FUNCTION finish_macos_app)
+    list(APPEND POST_CONFIGURE_FUNCTIONS finish_macos_app)
 endif()
 
 function(finish_macos_app)

cmake/post_configure.cmake

@@ -0,0 +1,3 @@
+foreach(POST_CONFIGURE_FUNCTION IN LISTS POST_CONFIGURE_FUNCTIONS)
+    cmake_language(CALL ${POST_CONFIGURE_FUNCTION})
+endforeach()