:snake: Tracking Issue uv/PyPI integration

[ruben-arts]

This is a list of issues which need to be solved to have complete pypi support.

Big features

• custom pypi index #1094 related pr: feat: alternative pypi registries #1225
• pip compile equivalent / trigger solve #1131
• Install dependencies of pypi package from conda preferentially #532

PyPI build environment

• Unsolvable pypi dependencies if platform excluded by feature #1051
• pixi install installs all environments in multi env setting when pypi-dependency is used #1046
• Cannot solve cross platform with a pypi dependency #1130

Related to wheel building

• Make pixi use build-backend dependencies from conda packages instead of uv build isolated variants #1088
• Read the build-system.requires during pixi init in some way #1109
• Non-editables and editables install cannot be combined in the same solve-group #1123
• Expose UV NoBuildIsolation in some way #1124

Small changes

• Support minimal lock-file updates when using pypi-dependencies #1296
• make support for pixi add --pypi source dependencies. #1078
• Pixi removing packages installed by uv not part of pixi.toml #998 related pr: feat: dont remove non pixi pypi installs #1043
• Expose uv config for pre-releases #1291
• pypi-dependencies wheel only installation #1294

Fixes

• Don't require uv build context when having no pypi-dependencies #1232