Bug description

I have a project that uses mkdocstrings for generating documentation. Currently (zensical==0.0.20) if the mkdocstrings extension fails, e.g.

$ zensical build --clean    
Build started
Error: ModuleNotFoundError: No module named 'mkdocstrings'
Error: ModuleNotFoundError: No module named 'mkdocstrings'
Error: ModuleNotFoundError: No module named 'mkdocstrings'
Build finished in 0.06s

$ echo $?
0

then the zensical output directory contains only a partially built site containing assets, with no pages:

├── assets
│   ├── images
│   │   └── favicon.png
│   ├── javascripts
│   │   ├── LICENSE
│   │   ├── bundle.8ffeb9c9.min.js
│   │   └── workers
│   │       └── search.e2d2d235.min.js
│   └── stylesheets
│       ├── classic
│       │   ├── main.9a39631f.min.css
│       │   └── palette.7dc9a0ad.min.css
│       └── modern
│           ├── main.d4922b3c.min.css
│           └── palette.dfe2e883.min.css
└── sitemap.xml

and the exit code is 0.

It would be nice if the exit code would be 1 (so that this is more obviously a failure, if for example it happens in CI). Maybe we should also have the output directory be cleaned up?

I should mention that I'd be happy to contribute the necessary changes if this sounds okay to the maintainers!

Related links

• mkdocstrings

Reproduction

repro.tar.gz

Steps to reproduce

1. In any fresh zensical docs config, enable the mkdocstrings plugin.
2. Try to build without first installing mkdocstrings. The build will fail, but the exit code will be 0, and the site/ directory will only have the basic static assets.

Before submitting

• I have read and followed the bug reporting guidelines.
• I have attached links to the documentation, and possibly related issues.
• I assure that I have removed all customizations before submitting this bug report.
• I have attached a .zip file with a minimal reproduction.