This is an alternative to https://github.com/astral-sh/uv/pull/14788
which has the benefit that it addresses
https://github.com/astral-sh/uv/issues/13327 which would be an issue
even if we reverted #14447.
There are two changes here
1. We copy entry points into the ephemeral environment, and rewrite
their shebangs (or trampoline target) to ensure the ephemeral
environment is not bypassed.
2. We link `etc/jupyter` and `share/jupyter` data directories into the
ephemeral environment, this is in order to ensure the above doesn't
break Jupyter which unfortunately cannot find the `share` directory
otherwise. I'd love not to do this, as it seems brittle and we don't
have a motivating use-case beyond Jupyter. I've opened
https://github.com/jupyterlab/jupyterlab/issues/17716 upstream for
discussion, as there is a viable patch that could be made upstream to
resolve the problem. I've limited the fix to Jupyter directories so we
can remove it without breakage.
Closes https://github.com/astral-sh/uv/issues/14729
Closes https://github.com/astral-sh/uv/issues/13327
Closes https://github.com/astral-sh/uv/issues/14749
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
Incorporating #8637 into #8458
- Adds `python-managed` feature selection to Windows CI for `python
install` tests
- Adds trampoline sniffing utilities to `uv-trampoline-builder`
- Uses a trampoline to install Python executables into the `PATH` on
Windows
Currently, our trampoline is used to convert `<command> [args]` to
`python <command> [args]` for script entrypoints installed into virtual
environments. For #8458, it'd be nice to convert a shim `python3.12
[args]` to `python [args]`. Here, we modify the trampolines to support
this use-case.
The only change we really need here is to avoid injecting `<command>`
into the child process. We change the "magic number" at the end of the
trampoline executables from `UVUV` to `UVSC` and `UVPY` which define
"script" and "python" variants to the trampoline. We then omit the
`<command>` injection in the latter case. We also omit writing the zip
script payload.
To support construction of the new variant, a new
`uv-trampoline-builder` crate is introduced — this avoids requirements
on `uv-install-wheel` in future work. I also use `uv-trampoline-builder`
to consolidate some of the test setup for `uv-trampoline`.
There should be no backwards compatibility concerns, since trampolines
are fully self-referential.
I rebased to fix the commits at the end, as this took many iterations to
get working via CI. This should roughly be reviewable by commit if you
prefer.
