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function(vcpkg_replace_string filename match replace)
cmake_parse_arguments(PARSE_ARGV 3 "arg" "REGEX;IGNORE_UNCHANGED" "" "")
if(arg_REGEX)
set(arg_REGEX "REGEX")
else()
if("${match}" STREQUAL "${replace}")
return() # Avoid reading the file or triggering warnings
endif()
set(arg_REGEX "")
endif ()
file(READ "${filename}" contents)
string(SHA512 before_hash "${contents}")
string(${arg_REGEX} REPLACE "${match}" "${replace}" contents "${contents}")
string(SHA512 after_hash "${contents}")
if(NOT arg_IGNORE_UNCHANGED AND "${before_hash}" STREQUAL "${after_hash}")
message("${Z_VCPKG_BACKCOMPAT_MESSAGE_LEVEL}" "vcpkg_replace_string made no changes.")
endif()
file(WRITE "${filename}" "${contents}")
endfunction()
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