Use UV as a faster pip implementation

[Arusekk]

Closes #2490

[Arusekk]

Okay: for some reason this breaks PLT emulation (so unicorn?), breaks it consistently, and only breaks it on py3.10.

Why? No idea yet.

[Arusekk]

>>> import unicorn
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/.venv/lib/python3.10/site-packages/unicorn/__init__.py", line 4, in <module>
    from .unicorn import Uc, ucsubclass, uc_version, uc_arch_supported, version_bind, debug, UcError, __version__
  File "/.venv/lib/python3.10/site-packages/unicorn/unicorn.py", line 14, in <module>
    from .unicorn_py3 import *
  File "/.venv/lib/python3.10/site-packages/unicorn/unicorn_py3/__init__.py", line 1, in <module>
    from .unicorn import *
  File "/.venv/lib/python3.10/site-packages/unicorn/unicorn_py3/unicorn.py", line 236, in <module>
    uclib = __load_uc_lib()
  File "/.venv/lib/python3.10/site-packages/unicorn/unicorn_py3/unicorn.py", line 123, in __load_uc_lib
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

[Arusekk]

Okay, this is a thing probably on Unicorn's side: unicorn-engine/unicorn#2122

[Arusekk]

Huh?

https://github.com/astral-sh/uv/blob/83f1b8b0f13713f2413ae9b96c64da0cedcf5fb8/crates/uv/src/commands/venv.rs#L354-L365

        // Resolve the seed packages.
        let requirements = if interpreter.python_tuple() >= (3, 12) {
            vec![Requirement::from(
                uv_pep508::Requirement::from_str("pip").unwrap(),
            )]
        } else {
            // Include `setuptools` and `wheel` on Python <3.12.
            vec![
                Requirement::from(uv_pep508::Requirement::from_str("pip").unwrap()),
                Requirement::from(uv_pep508::Requirement::from_str("setuptools").unwrap()),
                Requirement::from(uv_pep508::Requirement::from_str("wheel").unwrap()),
            ]
        };

It seems venv does seed itself, but not venv-less things.

[Arusekk]

Blocked: waiting for Unicorn 2.1.4.

[cclauss]

Please fix git conflicts.

[Arusekk]

Note setup-uv@v6 brought a usability impairment (astral-sh/setup-uv#381).

[Arusekk]

Nope, still blocked, waiting for unicorn 2.1.5 (2.1.4 has broken MIPS).

[cclauss]

ModuleNotFoundError: No module named 'pkg_resources'

Some of the pkg_resources code is still available in modern setuptools.
% uvx --with=unicorn python3.14 -c 'import unicorn'
% uvx --with=setuptools,unicorn python3.14 -c 'import unicorn'

[peace-maker]

We should consider softening our unicorn 2.1.4 ban and maybe allow it and just add a temporary warning when emulating MIPS PLT. There are annoying consequences when installing pwntools on Python 3.14 due to missing unicorn binary wheels.

Then we could switch to uv too or are there other blockers still @Arusekk?

[peace-maker]

See #2721