`uv version --bump ...` drops comments just before the version

[khneal]

Summary

I noticed that using uv version --bump ... will drop any comments in pyproject.toml on lines immediately preceding the "version = ..." line.

For example, running uv version --bump patch with this pyproject.toml:

# hello
[project]
# hello
name = "hello-world"
# hello
version = "0.1.0"
# hello
description = "Add your description here"
# hello
readme = "README.md"
# hello
requires-python = ">=3.13"
# hello
dependencies = []
# hello

Will result in this:

# hello
[project]
# hello
name = "hello-world"
version = "0.1.1"
# hello
description = "Add your description here"
# hello
readme = "README.md"
# hello
requires-python = ">=3.13"
# hello
dependencies = []
# hello

Platform

macOS 15 arm64

Version

uv 0.8.22 (Homebrew 2025-09-23)

Python version

Python 3.13.7 (main, Sep 18 2025, 22:52:34) [Clang 20.1.4 ]

[konstin]

We need to preserve the decor when changing the version.

[assadyousuf]

Have a fix for this: #16141

[khneal]

Thank you @assadyousuf and @konstin!
This will help us retain comments for developers that are not as familiar with pyproject.toml.