while[ -h "$SOURCE"];do# resolve $SOURCE until the file is no longer a symlink
DIR="$(cd -P "$( dirname "$SOURCE")"&&pwd)"
SOURCE="$(readlink "$SOURCE")"
[[$SOURCE != /* ]]&&SOURCE="$DIR/$SOURCE"# if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
# UTC Timestamp of the last commit is used as the build number. This is for easy synchronization of build number between Windows, OSX and Linux builds.