move logic for getting xpybuild version number into a function to avoid polluting the toplevel namespace of every module that imports buildcommon (which is all of them)
move logic for getting xpybuild version number into a function to avoid polluting the toplevel namespace of every module that imports buildcommon (which is all of them)

xpybuild/xpybuild,xpybuild/xpybuild,xpybuild/xpybuild,xpybuild/xpybuild