Not able to generate a standalone html from a notebook

Describe the bug

Jupyter-Book cannot build a standalone page.

To Reproduce

Steps to reproduce the behavior:

1. Generate a jupyter notebook;
2. Run jupyter-book build notebook.ipynb;

Expected behavior

Jupyter-book should generate a standalone html page, instead it freezes here:

$ jupyter-book build Untitled1.ipynb
Running Jupyter-Book v0.9.1
Source Folder: /home/raphael
Config Path: None
Output Path: /home/raphael/_build/_page/Untitled1/html
Running Sphinx v3.2.1

Environment

• Python Version [e.g. 3.7.1]: 3.7.9

• Package versions or output of jupyter-book --version: Jupyter Book: 0.9.1 MyST-NB: 0.10.2 Sphinx Book Theme: 0.0.39 MyST-Parser: 0.12.10 Jupyter-Cache: 0.4.2 NbClient: 0.5.1

• Operating System: Ubuntu 20.04 and Windows 10.

Additional context

I can use jupyter-book for a ‘complete’ project, everything works fine in this case. The problem only happens when trying to build a standalone page. I have also tried to run with $ jupyter-book build -W -n -vvv --keep-going Untitled1.ipynb, the output is in the jblog.txt file. jblog.txt

[raphaeltimbo]

Hi there @emdupre ! I have tried the command, but it returned an error:

$ jupyter-book build --builder singlehtml /home/raphael/Untitled1.ipynb
Usage: jupyter-book build [OPTIONS] PATH_SOURCE
Try 'jupyter-book build -h' for help.

Error: Invalid value for '--builder': invalid choice: singlehtml. (choose from html, dirhtml, pdfhtml, latex, pdflatex, linkcheck, custom)

I have left the build running here and after a long time it produced this log: sphinx-err-qd5hij84.log

At the end it has this message: jupyter_client.kernelspec.NoSuchKernel: No such kernel named conda-env-rs-py I think that maybe something in my conda env could cause this (maybe nb_conda_kernels), so I am going to try on a clean env.

[choldgraf]

ahhh - this feels like it is related to the fact that conda tends to create lots of custom kernels. Maybe the kernel used to execute the book isn’t the same as the kernel embedded in the notebooks themselves.

This feels related to https://github.com/executablebooks/meta/discussions/222 as well 🤔