feat: new pixi global

[Hofer-Julian]

This adds functionality as described in https://pixi.sh/dev/design_proposals/pixi_global_manifest/

Test it locally by doing the following:

# Clone the repository
git clone https://github.com/prefix-dev/pixi.git

# Navigate into the repository
cd pixi

# Checkout a specific branch
git switch feature/pixi-global

# Install the Rust project with a custom binary name
pixi run install-as pixid

Helpful tests for us:

# Make sure that your current setup is loaded into a manifest in $HOME/.pixi/manifests/pixi_global.toml
> pixi global sync

# Make sure running install adds a package and exposed the binaries
> pixi global install nushell
> nu

# Make sure binaries can be properly exposed as specials
> pixi global install "python==3.10.*" --expose python310=python
> python310

[ruben-arts]

Nitpick: I'm not a fan of the project directory as this has nothing to do with the "pixi projects". I would just move all the code into the src/global. And then you could move the manifest into its own module for instance.

[wolfv]

When updating or instlaling I would like to see the new version that was installed afterwards.

Also I had a situation where I did:

pixi global install rattler-build=0.23   # not the latest
pixi global update rattler-build  # did not do anything 

For the latter, I think it migth be good to print something. I know that might be more work though. Let's think about it tomorrow.

[wolfv]

And one last little one: I tried to figure out what version of rattler-build I had installed, but I think pixi global list does not let me filter right now? I tried pixi global list rattler and pixi global list rattler-build. My assumption was, that, like search it would show me things starting with these letters.

[ruben-arts]

@wolfv pixi g list -e rattler-build gives more info

[chawyehsu]

Packages having underscore in their name get ignored

$ pixi g list
Global install location: C:\[redacted]\
├── conda-smithy 3.41.1
|   └─ exec: feedstocks.bat, conda-smithy.bat
├── huggingface_hub 0.25.1
|   └─ exec: huggingface-cli.bat
├── rattler-build 0.23.0
|   └─ exec: rattler-build.bat, generate-cli-docs.bat
└── uv 0.4.17
   └─ exec: uvx.bat, uv.bat

$ pixi-next g list
WARN Failed to parse environment name 'huggingface_hub', please use only lowercase letters, numbers and dashes
Global environments as specified in 'C:\[redacted]\manifests\pixi-global.toml'
├── conda-smithy: 3.41.1
│   └─ exposes: feedstocks, conda-smithy
├── rattler-build: 0.23.0
│   └─ exposes: generate-cli-docs, rattler-build
└── uv: 0.4.17
   └─ exposes: uvx, uv

[Hofer-Julian]

Oh nice find @chawyehsu!

[ruben-arts]

Awesome work 🚀