mirror of
https://github.com/jupyterhub/jupyterhub.git
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4082006039
swaps from default nbclassic and opt-in to lab, to now default to lab and opt-in to nbclassic defaults to jupyterlab *if* lab 3.1 is available, so should still work without configuration if lab is unavailable (or too old)
69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
"""Make a single-user app based on the environment:
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- $JUPYTERHUB_SINGLEUSER_APP, the base Application class, to be wrapped in JupyterHub authentication.
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default: jupyter_server.serverapp.ServerApp
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.. versionchanged:: 2.0
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Default app changed to launch `jupyter labhub`.
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Use JUPYTERHUB_SINGLEUSER_APP=notebook.notebookapp.NotebookApp for the legacy 'classic' notebook server.
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"""
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import os
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from traitlets import import_item
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from .mixins import make_singleuser_app
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JUPYTERHUB_SINGLEUSER_APP = os.environ.get("JUPYTERHUB_SINGLEUSER_APP")
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if JUPYTERHUB_SINGLEUSER_APP:
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App = import_item(JUPYTERHUB_SINGLEUSER_APP)
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else:
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App = None
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_import_error = None
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for JUPYTERHUB_SINGLEUSER_APP in (
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"jupyter_server.serverapp.ServerApp",
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"notebook.notebookapp.NotebookApp",
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):
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try:
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App = import_item(JUPYTERHUB_SINGLEUSER_APP)
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except ImportError as e:
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continue
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if _import_error is None:
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_import_error = e
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else:
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break
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if App is None:
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raise _import_error
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SingleUserNotebookApp = make_singleuser_app(App)
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def main():
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"""Launch a jupyterhub single-user server"""
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if not os.environ.get("JUPYTERHUB_SINGLEUSER_APP"):
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# app not specified, launch jupyter-labhub by default,
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# if jupyterlab is recent enough (3.1).
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# This is a minimally extended ServerApp that does:
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# 1. ensure lab extension is enabled, and
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# 2. set default URL to `/lab`
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import re
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_version_pat = re.compile(r"(\d+)\.(\d+)")
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try:
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import jupyterlab
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from jupyterlab.labhubapp import SingleUserLabApp
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m = _version_pat.match(jupyterlab.__version__)
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except Exception:
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m = None
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if m is not None:
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version_tuple = tuple(int(v) for v in m.groups())
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if version_tuple >= (3, 1):
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return SingleUserLabApp.launch_instance()
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return SingleUserNotebookApp.launch_instance()
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