qBittorrent/cmake/Modules/FunctionReadVersion.cmake

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# function for parsing version variables that are set in version.pri file
# the version identifiers there are defined as follows:
# VER_MAJOR = 3
# VER_MINOR = 4
# VER_BUGFIX = 0
# VER_BUILD = 0
# VER_STATUS = alpha
function(read_version priFile outMajor outMinor outBugfix outBuild outStatus)
file(STRINGS ${priFile} _priFileContents REGEX "^VER_.+")
# message(STATUS "version.pri version contents: ${_priFileContents}")
# the _priFileContents variable contains something like the following:
# VER_MAJOR = 3;VER_MINOR = 4;VER_BUGFIX = 0;VER_BUILD = 0;VER_STATUS = alpha # Should be empty for stable releases!
set(_regex "VER_MAJOR += +([0-9]+);VER_MINOR += +([0-9]+);VER_BUGFIX += +([0-9]+);VER_BUILD += +([0-9]+);VER_STATUS += +([0-9A-Za-z]+)?")
# note quotes around _regex, they are needed because the variable contains semicolons
string(REGEX MATCH "${_regex}" _tmp "${_priFileContents}")
if (NOT _tmp)
message(FATAL_ERROR "Could not detect project version number from ${priFile}")
endif()
# message(STATUS "Matched version string: ${_tmp}")
set(${outMajor} ${CMAKE_MATCH_1} PARENT_SCOPE)
set(${outMinor} ${CMAKE_MATCH_2} PARENT_SCOPE)
set(${outBugfix} ${CMAKE_MATCH_3} PARENT_SCOPE)
set(${outBuild} ${CMAKE_MATCH_4} PARENT_SCOPE)
set(${outStatus} ${CMAKE_MATCH_5} PARENT_SCOPE)
endfunction()