Snippet for git version for build header

gitrev-snippet.genie

function KaBuild.VersionHeader(self)
	return KaBuild.SourcePath(self, 'KaVersionBuildId.h')
end

-- ...
    
    prebuildcommands {
			'echo "#pragma once" > ' .. build:VersionHeader(),
			'echo -n "#define ENGINE_BUILD_SRC 0x" >> ' .. build:VersionHeader(),
			'git describe --always >> ' .. build:VersionHeader(),
		}
    
-- Output looks-a-like dis:
-- #pragma once
-- #define ENGINE_BUILD_SRC 0x3163c1f29