Resolves https://github.com/astral-sh/uv/issues/3313
## Summary
Add a new env variable `UV_LINK_MODE` as alias for the cli argument
--link-mode.
Updated the README env variables section.
## Test Plan
Tested manually using `UV_LINK_MODE=hardlink cargo run -p uv pip install
flask`.
When running
```
set UV_CACHE_DIR=%LOCALAPPDATA%\uv\cache-foo && uv venv venv
```
in windows CMD, the error would be just
```
error: The system cannot find the path specified. (os error 3)
```
The problem is that the first action in the cache dir is adding the tag,
and the `cachedir` crate is using `std::fs` instead of `fs_err`. I've
copied the two functions we use from the crate and changed the import
from `std::fs` to `fs_err`.
The new error is
```
error: failed to open file `C:\Users\Konstantin\AppData\Local\uv\cache-foo \CACHEDIR.TAG`
Caused by: The system cannot find the path specified. (os error 3)
```
which correctly explains the problem.
Closes#3280
We would only record spans for `uv` prefixed crates, while the rayon
operations are in `install_wheel_rs`, therefore "disappearing" spans
from rayon.
With these changes, we can profile the parallel installation:

## Summary
It seems like Azure might return a 401 when you request a package that
doesn't exist (even with valid credentials)? But I admittedly haven't
tested this. (We already skip 403, and this seems similar?)
Closes https://github.com/astral-sh/uv/issues/3291.
## Summary
This index strategy resolves every package to the latest possible
version across indexes. If a version is in multiple indexes, the first
available index is selected.
Implements #3137
This closely matches pip.
## Test Plan
Good question. I'm hesitant to use my certifi example here, since that
would inevitably break when torch removes this package. Please comment!
## Summary
The approach taken here is to model `--target` as an install scheme in
which all the directories are just subdirectories of the `--target`.
From there, everything else... just works? Like, upgrade, uninstalls,
editables, etc. all "just work".
Closes#1517.
## Summary
based on PEP 508 the `platform_machine` should be same as
`platform.machine()` output:
https://peps.python.org/pep-0508/#environment-markers
From my macOS M2
```python
In [1]: import platform
In [2]: platform.machine()
Out[2]: 'arm64'
```
I napari we also use `arm64` in requirements and it works as expected:
9fcf63e69a/pyproject.toml (L120)
## Test Plan
<!-- How was it tested? -->
I rebased https://github.com/astral-sh/uv/pull/2757 then realized that
we want to implement this for more than `uv venv`.
Closes https://github.com/astral-sh/uv/issues/2587
Closes https://github.com/astral-sh/uv/issues/2757
```
❯ cargo run -q -- pip install -p /Users/mz/bin/python3.7 anyio
warning: uv is only compatible with Python 3.8+, found Python 3.7.17.
Audited 1 package in 84ms
❯ cargo run -q -- venv -p /Users/mz/bin/python3.7
warning: uv is only compatible with Python 3.8+, found Python 3.7.17.
Using Python 3.7.17 interpreter at: /Users/mz/bin/python3.7
Creating virtualenv at: .venv
Activate with: source .venv/bin/activate
```
---------
Co-authored-by: Stevie Gayet <stegayet@users.noreply.github.com>
## Summary
Simplifies dependency errors of the form `you require package-a and you
require package-b` to `you require package-a and package-b`. Resolves
https://github.com/astral-sh/uv/issues/1009.
The only thing a `OnceMap` really needs to be able to do with the value
is to clone it. All extant uses benefited from having this done for them
by automatically wrapping values in an `Arc`. But this isn't necessarily
true for all things. For example, a value might have an `Arc` internally
to making cloning cheap in other contexts, and it doesn't make sense to
re-wrap it in an `Arc` just to use it with a `OnceMap`. Or
alternatively, cloning might just be cheap enough on its own that an
`Arc` isn't worth it.
Previously, this would use the "system" temporary directory.
Because we rename the resulting directory to its final destination,
and because renaming is implemented via hardlinking, and because
hardlinking doesn't work across mount points, and because /tmp is
commonly on a different mount point than where `uv` is checked out,
we "fix" this by putting the temporary directory somewhere close to
the final destination of the fetched artifact.
There are alternatives we might consider pursuing. For example,
if the `rename` fails, then we should probably do a recursive
directory copy. But this is a quick fix for now and it also
consistent with colocation of other temporary directories in `uv`.
The main downside of this change is that if a user does ^C while
`uv-dev fetch-python` is running, then there is no mechanism for
cleaning up temporary directories.
## Summary
I initially implemented this by allowing arbitrary
`x86_64-manylinux_x_y`, but it makes the Clap, Serde, and Schemars
definitions more complicated, _and_ makes it harder for the user.
Ultimately, manylinux itself only provides images for 2_17 and 2_28, so
this seems like it should be sufficient.
Closes https://github.com/astral-sh/uv/issues/3222.
## Summary
We now recursively expand any self-dependencies via extras, which lets
us detect conflicts sooner and avoid building unnecessary versions of
packages that are excluded via the extra.
Closes https://github.com/astral-sh/uv/issues/3135.
Previously, uv-auth would fail to compile due to a missing process
feature. I chose to make all tokio features we use top level features,
so we can share the tokio cache between all test invocations.
## Summary
See the diff in the tests. If you have a constraint with an extra, we
should respect it, but we shouldn't _add_ the extra to the requirements.
## Summary
macOS 11 has been EOL for 7 months, and it seems like it's common to
publish ARM-only wheels at 12.0+. I think this is a better default for
ARM macs.
Closes https://github.com/astral-sh/uv/issues/3227.
## Test Plan
`cargo run pip install scikit-learn==1.3.2 --python-platform macos
--no-build`
## Summary
The cli gives <COLOR> as value placeholder which is misleading. I
changed this to <COLOR_CHOICE> to make it obvious you don't supply a
color but a ColorChoice value.
## Test Plan
Compiled and verified --help text was correct
## Summary
This is mainly a cleanup PR to leverage uv-version in uv-virtualenv
instead of passing it via `uv`.
In #1852 I introduced the ability to pass extra cfg to `gourgeist` for
the primary purpose of passing the uv version, but since the dawn of the
uv-version crate dynamically passing more values to pyvenv.cfg is no
longer needed.
## Test Plan
Existing `uv` tests should still verify `uv = <version>` exists in the
venv and make sure no regressions were introduced.
## Summary
The function `find_in_directory` joins `uv.toml`. The initial join in
`user` is redundant.
Also a small comment fix.
## Test Plan
Not really sure how to test this. Please suggest if any tests need to be
added.
## Summary
Avoid removing quotes from markers, e.g. `numpy (>=1.19) ;
python_version >= "3.7"` should not be rewritten. Fixes
https://github.com/astral-sh/uv/issues/2551.
This PR also makes fixups a bit more flexible internally for fixes that
aren't simple to implement with a pure regex replacement, like this one.
https://github.com/astral-sh/uv/pull/1529 fixed a similar problem but
the current regex is still not smart enough to avoid all markers
completely (like `python_version`).
## Test Plan
Added a few unit tests.
Fixes the failure to lookup credentials in
https://github.com/astral-sh/uv/issues/3205
The issue is that we seed the cache with the index URL which includes a
username but no password. We did not ensure that a password was present
in the cached credentials before attempting a request with them. Now,
the cache will not return credentials when a username is provided and
the cached credentials have no password — the cached credentials are
useless in that case.
Tested with a Google Artifact Registry and keyring
```
RUST_LOG=uv=trace cargo run -q -- pip install requests --index-url https://oauth2accesstoken@us-central1-python.pkg.dev/<project>/pypi/simple/ --no-cache --keyring-provider subprocess -v
```