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Example JupyterHub config allowing users to specify environment variables and notebook-server args
import shlex
from jupyterhub.spawner import LocalProcessSpawner
class DemoFormSpawner(LocalProcessSpawner):
def _options_form_default(self):
default_env = "YOURNAME=%s\n" %
return """
<label for="args">Extra notebook CLI arguments</label>
<input name="args" placeholder="e.g. --debug"></input>
<label for="env">Environment variables (one per line)</label>
<textarea name="env">{env}</textarea>
def options_from_form(self, formdata):
options = {}
options['env'] = env = {}
env_lines = formdata.get('env', [''])
for line in env_lines[0].splitlines():
if line:
key, value = line.split('=', 1)
env[key.strip()] = value.strip()
arg_s = formdata.get('args', [''])[0].strip()
if arg_s:
options['argv'] = shlex.split(arg_s)
return options
def get_args(self):
"""Return arguments to pass to the notebook server"""
argv = super().get_args()
if self.user_options.get('argv'):
return argv
def get_env(self):
env = super().get_env()
if self.user_options.get('env'):
return env
c.JupyterHub.spawner_class = DemoFormSpawner