vroomanj

from dockerspawner import SystemUserSpawner

from traitlets import default

from tornado import gen

class SystemUserChooser(SystemUserSpawner):
    @default('options_form')
    def _options_form(self):
        default_env = "YOURNAME=%s\n" % self.user.name

vroomanj

[TON OF DEBUG STATEMENTS]
2016-09-16 07:53:05,501 root         INFO     docker-squash version 1.0.4, Docker d381c64-unsupported, API 1.22...
2016-09-16 07:53:05,501 root         INFO     Using v2 image format
2016-09-16 07:53:05,645 root         INFO     Old image has 60 layers
2016-09-16 07:53:05,645 root         INFO     Checking if squashing is necessary...
2016-09-16 07:53:05,645 root         INFO     Attempting to squash last 60 layers...
2016-09-16 07:53:05,646 root         INFO     Saving image sha256:929d5cb581d25e2421fc306a3c574557b93baf9153899b329d79edfc9ad1b140 to /tmp/docker-squash-ygjmez2c/old/image.tar file...
2016-09-16 08:27:25,384 root         INFO     Image saved!
2016-09-16 08:27:25,428 root         INFO     Unpacking /tmp/docker-squash-ygjmez2c/old/image.tar tar file to /tmp/docker-squash-ygjmez2c/old directory
2016-09-16 08:37:38,745 root         INFO     Archive unpacked!