Jupyter notebook integration/mode

[remram44]

Need to think about what this means, but something can probably be done.

[remram44]

Current idea:

Run the kernel component of Jupyter (could be IPython, could be any other supported kernel) in a wrapper script that traces and then pack. Jupyter works as normal, but when you are done you get a RPZ file with Python, the kernel components, and all the libraries and data that are used in the notebook.

This should work with a wrapper script; we can provide a custom KernelSpecManager that would use that wrapper for each existing kernel.

Re-running a packed environment would need some trickery, since we need to change the connection file. A different wrapper is necessary to start the kernel via reprounzip.

Relevant: jupyter/jupyter_client#157 (Jupyter needs to leave time for ReproZip to finish packing once kernel is done)

[remram44]

New idea: trace/pack notebook file offline. Re-running still needs trickery, but the tracer can be written to place the connection file in a saner place? (it should probably still appear as an input file)

[remram44]

Question we discussed today: how to deal with the separate notebook+reprozip files?

• Having to distribute both together is awkward
• Putting a link in the notebook to the package is difficult because there needs to be a permanent URL and the user needs to put it in there (but it's the easiest to use)
• Putting the notebook in the package is awkward; unpacker could show them but someone not using ReproZip wouldn't be able to look at them, and changing them means they still have to be distributed separately

[remram44]

Working on the Jupyter extension to do this from the notebook UI. Goal for SciPy: one-click trace-and-pack, and save in the client side.

• Trace & pack on server
• Notebook extension
• File tree extension

[remram44]

Fixes:

• From GUI, open notebook server in the right directory (that ipynb is in)
• Add option to Kernel menu (with "...")
• Handle notebook execution fail (user code failed)
• Add box for config file/pack filename
• Add button from the tree view too
• Warn if cells are out of order before tracing?