Feature Request: UV Builder support for dependency groups like `Pixi's .environment()`

[yzx9]

The Pixi builder supports selecting named environments from pixi.toml via .environment():

Environment env = Appose.pixi("pixi.toml")
  .environment("cuda")
  .build();

This maps to pixi install -e cuda and enables optional dependency selection without modifying the manifest.

The UV builder has no equivalent. When using .content(pyprojectContent).scheme("pyproject.toml"), only [project.dependencies] is resolved. PEP 735 [dependency-groups] are ignored, so there is no way to install optional groups.

Proposed solution

Add a group(String...) method to UvBuilder that maps to uv sync --group <name>:

Environment env = Appose.uv()
  .content(pyprojectContent)
  .scheme("pyproject.toml")
  .python("3.12")
  .group("appose")       // maps to: uv sync --group appose
  .group("cuda")         // maps to: uv sync --group appose --group cuda
  .build();

This would bring UV builder to parity with Pixi builder's .environment() for optional dependency selection

If you’re interested, I can propose a PR

Current workaround

Consumers can modify the pyproject.toml content string before passing it to the builder:

String content = Files.readString(pyprojectFile.toPath());
content = content.replaceFirst("(dependencies\\s*=\\s*\\[)", "$1\"appose>=0.5.1\",");