feat: add trampoline for pixi global

[Hofer-Julian]

TODO:

• Implement hardlinked trampoline to reuse the binary.

[nichmor]

to reiterate missing things:

• making hard links of trampoline when installing rather than duplicating them
• compressing trampoline binary itself to include a smaller sized thing in pixi
• testing

[Hofer-Julian]

Testing:

Preparation

• cp -r ~/.pixi ~/.pixi-backup

Things we should test:

• Migration with pixi global sync
• Is everything there? Does pixi global list work? Are the binaries working?
• pixi global install $your_favorite_binaries
• pixi global add $something
• pixi global remove $something
• pixi global edit and pixi global sync
• rm -rf ~/.pixi
• cp -r ~/.pixi-backup ~/.pixi
• Delete some files in ~/.pixi/bin and/or ~/.pixi/envs
• Run pixi global sync
• Is the result expected?

[wolfv]

Here are a few things I tried:

1. Launch Python and check that it has no parent process other than zsh: Looks good!

$ pstree -s python
-+= 00001 root /sbin/launchd
 |-+= 02808 wolfv /Applications/iTerm.app/Contents/MacOS/iTerm2
 | \-+- 02810 wolfv /Users/wolfv/Library/Application Support/iTerm2/iTermServer-3.5.5 /Users/wolfv/Library/Application Support/iTerm2/iterm2-daemon-1.socket
 |   |-+= 67889 root /usr/bin/login -fpl wolfv /Applications/iTerm.app/Contents/MacOS/ShellLauncher --launch_shell
 |   | \-+= 67891 wolfv -zsh
 |   |   \--= 76396 wolfv /Users/wolfv/.pixi/envs/python/bin/python

2. Launch Python and press CTRL+C and CTRL+D, both work as expected
3. Check that we get the correct exit code: while this looks wrong, it's the same without the trampoline. We might want to double check on Linux and Win.

╰─$ ~/.pixi/envs/python/bin/python
Python 3.13.0 | packaged by conda-forge | (main, Oct 17 2024, 12:32:35) [Clang 17.0.6 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.exit(123)
╭─wolfv@pixi ~/Programs/pixi ‹feat/global-trampoline●›
╰─$ echo $?                                                                                                                                                                                                                                                               

1

4. Installed and started Spyder: GUI program works as well!