buildbot/buildbot — pull request #659 by elmirjagudin (2013-03-13 12:34:31+00:00)
Title: Check if valid base directory is specified for 'buildslave upgrade-slave' command.

Check if we got a valid slave base dir on 'buildslave upgrade-slave' cli command. If not, print error message and exit.

Currently the command will fail with a exception Traceback on invalid base directory.