Comment 8 for bug 1429896

Daniel, my preference for a build folder is always for it to be entirely generated. I prefer in-folder builds (as opposed to some other folder hidden somewhere like /tmp), but nonetheless the folder should all be generated and not have any files I care about in it. For that reason I can completely delete the folder and regenerate it at will. You could make an argument about build only having temporary files and the output (click package, html pages, etc) going somewhere else.