[jupyter] Provide JupyterLab UI

JupyterLab is provided side-by-side with Jupyter Classic interface within
the same process.

Published URL changed:

 * jupyterlab-url provides IPv6 URL to JupterLab interface
 * jupyter-class-url provides IPv6 URL to the classic UI

Thanks to using only one process, the path in the URL differentiates the
style of the interface.

component/jupyter/buildout.cfg

@@ -39,6 +39,9 @@ eggs =
   ${seaborn:egg}
   ${statsmodels:egg}
   patsy
+# additional eggs for jupyterlab
+  jupyterlab
+  jupyterlab-launcher
 
 interpreter = pythonjupyter
 
@@ -69,6 +72,9 @@ scripts =
   jupyter-nbextension
   jupyter-notebook
   jupyter-serverextension
+  jupyter-lab
+  jupyter-labextension
+  jupyter-labhub
 
 initialization =
   # https://github.com/ipython/ipython/issues/5420

software/jupyter/buildout.hash.cfg

@@ -16,7 +16,7 @@
 
 [instance-jupyter-notebook]
 filename = instance.cfg.in
-md5sum = 27bb1bcf71a2f637f539af697ed73445
+md5sum = 89ef078efd20c5e03d1cf7228568b865
 
 [jupyter-notebook-config]
 filename = jupyter_notebook_config.py.jinja

software/jupyter/instance.cfg.in

@@ -59,7 +59,7 @@ key_file = ${directory:etc}/jupyter_cert.key
 [instance]
 recipe = slapos.cookbook:wrapper
 command-line =
-  {{ bin_directory }}/jupyter-notebook
+  {{ bin_directory }}/jupyter-lab
   --no-browser
   --ip=${instance-parameter:host}
   --port=${instance-parameter:port}
@@ -68,7 +68,7 @@ command-line =
   --keyfile=${instance-parameter:key_file}
   --notebook-dir=${instance-parameter:notebook_dir}
   --log-level="DEBUG"
-wrapper-path = ${directory:service}/jupyter-notebook
+wrapper-path = ${directory:service}/jupyter-lab
 parameters-extra = true
 environment =
   JUPYTER_PATH=${directory:jupyter_dir}
@@ -126,7 +126,8 @@ instance-configuration =
 
 [publish-connection-parameter]
 recipe = slapos.cookbook:publish.serialised
-url = https://[${instance-parameter:host}]:${instance-parameter:port}
+jupyter-classic-url = https://[${instance-parameter:host}]:${instance-parameter:port}/tree
+jupyterlab-url = https://[${instance-parameter:host}]:${instance-parameter:port}/lab
 
 [erp5-kernel]
 recipe = slapos.cookbook:symbolic.link

software/jupyter/software.cfg

@@ -71,6 +71,8 @@ ipython-genutils = 0.1.0
 ipywidgets = 6.0.0
 jupyter-client = 5.0.0
 jupyter-core = 4.3.0
+jupyterlab = 0.26.3
+jupyterlab-launcher = 0.3.1
 matplotlib = 2.0.0
 mistune = 0.7.3
 nbformat = 4.3.0