nbdev_export modifies irrelevant items in pyproject.toml

[ifsheldon]

Provide a minimally reproducible example

You can clone my repo and initialize the environment with uv sync. The code in the repo is not relevant, but I'm sure that you can reproduce this issue in 5mins.

From line 43 - line 51 in my pyproject.toml, I setup sources of torch for uv to resolve.

[[tool.uv.index]]
name="torch-cpu"
url = "https://download.pytorch.org/whl/cpu"
explicit = true

[[tool.uv.index]]
name="torch-gpu"
url = "https://download.pytorch.org/whl/cu128"
explicit = true

https://github.com/ifsheldon/tensor-network-notes/blob/b675c068899e29c0c5324e7e7557ed41a1e9216a/pyproject.toml#L43

When I run uv run nbdev_export, nbdev_export keeps overwriting the name fields to the project name, which is really annoying, like below

[[tool.uv.index]]
name="tensor-network-code" # my project name
url = "https://download.pytorch.org/whl/cpu"
explicit = true

[[tool.uv.index]]
name="tensor-network-code" # my project name
url = "https://download.pytorch.org/whl/cu128"
explicit = true

Did you just do the plain string replacement when processing pyproject.toml instead of parsing it correctly?

[ifsheldon]

I think this is the cause

https://github.com/AnswerDotAI/nbdev/blob/ea0800cb1f4a7c5a847e840cf18bfecba95fd707/nbdev/config.py#L262

[jph00]

Disable update_pyproject in settings.ini to manage the file yourself.

[jph00]

(A better fix of course would be to handle the toml properly, rather than with a regex - PRs welcome if anyone wants to look at that.)