## Summary
This PR consolidates the concurrency limits used throughout `uv` and
exposes two limits, `UV_CONCURRENT_DOWNLOADS` and
`UV_CONCURRENT_BUILDS`, as environment variables.
Currently, `uv` has a number of concurrent streams that it buffers using
relatively arbitrary limits for backpressure. However, many of these
limits are conflated. We run a relatively small number of tasks overall
and should start most things as soon as possible. What we really want to
limit are three separate operations:
- File I/O. This is managed by tokio's blocking pool and we should not
really have to worry about it.
- Network I/O.
- Python build processes.
Because the current limits span a broad range of tasks, it's possible
that a limit meant for network I/O is occupied by tasks performing
builds, reading from the file system, or even waiting on a `OnceMap`. We
also don't limit build processes that end up being required to perform a
download. While this may not pose a performance problem because our
limits are relatively high, it does mean that the limits do not do what
we want, making it tricky to expose them to users
(https://github.com/astral-sh/uv/issues/1205,
https://github.com/astral-sh/uv/issues/3311).
After this change, the limits on network I/O and build processes are
centralized and managed by semaphores. All other tasks are unbuffered
(note that these tasks are still bounded, so backpressure should not be
a problem).
## Summary
This is universal environment variable used to determine the mac OS
deployment target. We now respect it in `--python-platform` -- so we
default to 12.0, but users can override it as needed.
## Summary
Hi! Added `UV_NO_BUILD_ISOLATION` as a boolean environment variable for
the `--no-build-isolation` command-line option.
Closes https://github.com/astral-sh/uv/issues/3309
## Test Plan
Added new test `respect_no_build_isolation_env_var` to check that the
behaviour is the same as if the ``--no-build-isolation``
command-line-option is set.
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`.
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## Summary
The option `--platform` for `uv pip compile` was added in #3111 and was
later renamed to `--python-platform` #3146.
This PR updates the documentation such that the listed option is working
again.
## Test Plan
```bash
❯ uv --version
uv 0.1.37 (645d0399f 2024-04-23)
```
Before:
```bash
❯ uv pip compile requirements.in --platform=linux
error: unexpected argument '--platform' found
tip: to pass '--platform' as a value, use '-- --platform'
Usage: uv pip compile <SRC_FILE>...
For more information, try '--help'.
```
After:
```bash
❯ uv pip compile requirements.in --python-platform=linux
Resolved 1 package in 215ms
# This file was autogenerated by uv via the following command:
# uv pip compile requirements.in --python-platform=linux
uv==0.1.37
```
Since we're now using read timeouts and not total timeouts, we can use a
lower threshold, a single read shouldn't take 5 min (and not even 10s).
The 10s value is somewhat arbitrary.
Like #3144, this is a breaking change in some sense.
## Summary
This PR is adding `UV_CONSTRAINT` environment variable as analogous to
`PIP_CONSTRAINT` to allow providing constraint file via environment
variable. Implementing this will simplify adoption of uv in testing
procedure in projects that I'm involved (testing using tox).
This was my motivation for opening #1841 that is closed in favor of
#1789 which was closed without implementing this feature.
In this implementation, I have used space as a separator as analogous to
`pip`. This introduces an obvious problem if the path contains space.
Another option could be to use standard separator (`:` - UNIX like, `;`
- Windows). Which one did you prefer?
## Test Plan
It is my first contribution and first rust coding experience. It will be
nice if one could point how I should implement testing this.
## Summary
I've wanted to try this for a long time, so decided to give it a shot.
The basic idea is that you can provide a target triple (e.g.,
`--platform x86_64-pc-windows-msvc`) and resolve against that platform,
rather than the currently-running platform. It's functionally similar to
`--python-version`, though a bit simpler since there's no need to engage
with `Requires-Python`.
Our infrastructure is well-setup for this and so, in the end, it's
actually pretty straightforward: for each triple, we just need to
override the markers and platform tags.
## Summary
This partially revives https://github.com/astral-sh/uv/pull/2135 (with
some modifications) to enable users to opt-in to looking for packages
across multiple indexes.
The behavior is such that, in version selection, we take _any_
compatible version from a "higher-priority" index over the compatible
versions of a "lower-priority" index, even if that means we might accept
an "older" version.
Closes https://github.com/astral-sh/uv/issues/2775.
## Summary
Hi! I noticed the badge in the `README.md` says CI it's failing
[](https://github.com/astral-sh/uv/actions)
But current main CI is okay. The problem is that badge is bringing the
latest actions ran in the repo. Even if it's from a PR
So I changed to this link:
It shows the current main branch CI status, but _I couldn't get the link
to work (go into `uv/actions`)_. Is it acceptable to lose some
functionality in order to display the correct information?
## Test Plan
manually
## Summary
I was going to create a feature-request issue for adding graph like
showing of currently installed dependencies in venv, but then I found
`uv pip freeze | uv pip compile` is what I'm looking for.
As one who manually pip-installs packages every once in a while (instead
of edit `requirements.in` each time), after a while I would need to have
graph of installed packages (e.g. to see how uninstallinga packages
effects on others).
I found this command is so useful and wondered if we could have this in
docs as one of `uv` features.
## Test Plan
<!-- How was it tested? -->
---------
Co-authored-by: Zanie Blue <contact@zanie.dev>
## Summary
Small follow up to https://github.com/astral-sh/uv/pull/2362 to check if
`SSL_CERT_FILE` is set to enable `--native-tls` functionality. This
maintains backwards compatibility with `0.1.17` and below users
leveraging only `SSL_CERT_FILE`.
Closes https://github.com/astral-sh/uv/issues/2400
## Test Plan
<!-- How was it tested? -->
Assuming `SSL_CERT_FILE` is already working via `--native-tls`, this is
simply a shortcut to enable `--native-tls` functionality implicitly
while still being able to let `rustls-native-certs` handle the loading
of `SSL_CERT_FILE` instead of ourselves.
Edit: Manually tested by setting up own self-signed CA certificate
bundle and set `SSL_CERT_FILE` to this and confirmed the loading happens
without having to specify `--native-tls`.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fix left over after renaming UV_SYSTEM to UV_SYSTEM_PYTHON in
https://github.com/astral-sh/uv/pull/2354
CC @charliermarsh
## Test Plan
<!-- How was it tested? -->
## Summary
It turns out that on macOS, reading the native certificates can add
hundreds of milliseconds to client initialization. This PR makes
`--native-tls` a command-line flag, to toggle (at runtime) the choice of
the `webpki` roots or the native system roots.
You can't accomplish this kind of configuration with the `reqwest`
builder API, so instead, I pulled out the heart of that logic from the
crate
(e319263851/src/async_impl/client.rs (L498)),
and modified it to allow toggling a choice of root.
Note that there's an open PR for this in reqwest
(https://github.com/seanmonstar/reqwest/pull/1848), along with an issue
(https://github.com/seanmonstar/reqwest/issues/1843), which I may ping,
but it's been around for a while and I believe reqwest is focused on its
next major release.
Closes https://github.com/astral-sh/uv/issues/2346.
## Summary
Add a new env variable `UV_SYSTEM` as alias for the cli argument
`--system`.
Use cases:
- No need to specify on each uv call inside the docker container the
`--system` flag
- It allows installing and configuring uv in a base container and in the
child containers nobody needs to know if you need the `--system` cli
flag
- The Home Assistant development env can be set up via devcontainer or a
venv. Both use some common scripts. Instead of adding duplicate or
special code to identify the dev container to set the `--system` flag,
it would be nicer to set it via an env variable.
I'm unfamiliar with Rust and tried to add the support by looking at the
code.
## Test Plan
I did test it manually
`UV_SYSTEM_PYTHON=true uv pip install requests`
`uv --system` is failing in GitHub Actions, because `py --list-paths`
returns all the pre-cached Pythons:
```
-V:3.12 * C:\hostedtoolcache\windows\Python\3.12.2\x64\python.exe
-V:3.12-32 C:\hostedtoolcache\windows\Python\3.12.2\x86\python.exe
-V:3.11 C:\hostedtoolcache\windows\Python\3.11.8\x64\python.exe
-V:3.11-32 C:\hostedtoolcache\windows\Python\3.11.8\x86\python.exe
-V:3.10 C:\hostedtoolcache\windows\Python\3.10.11\x64\python.exe
-V:3.10-32 C:\hostedtoolcache\windows\Python\3.10.11\x86\python.exe
-V:3.9 C:\hostedtoolcache\windows\Python\3.9.13\x64\python.exe
-V:3.9-32 C:\hostedtoolcache\windows\Python\3.9.13\x86\python.exe
-V:3.8 C:\hostedtoolcache\windows\Python\3.8.10\x64\python.exe
-V:3.8-32 C:\hostedtoolcache\windows\Python\3.8.10\x86\python.exe
-V:3.7 C:\hostedtoolcache\windows\Python\3.7.9\x64\python.exe
-V:3.7-32 C:\hostedtoolcache\windows\Python\3.7.9\x86\python.exe
```
So, our default selector returns the first entry here. But none of these
are actually in `PATH` except the one that the user installed via
`actions/setup-python@v5` -- that's the point of the action, that it
puts the correct versions in `PATH`.
It seems to me like we should prioritize `PATH` over `py --list-paths`.
Is there a good reason not to do this?
Closes: https://github.com/astral-sh/uv/issues/2056
Recommend installing uv on windows with
```
powershell -c "irm https://astral.sh/uv/install.ps1 | iex"
```
instead of
```
irm https://astral.sh/uv/install.ps1 | iex
```
to support installing on cmd.exe, the classic non-powershell windows
command prompt.
See https://github.com/axodotdev/cargo-dist/issues/458 for background.
This will also be included in the next cargo-dist release.
I have confirmed this passes on
* Command Prompt
* Windows PowerShell
* PowerShell
* git bash
Closes#1750
CC @12932 this fixes the uv command prompt installation.
## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
There was no example of to hint support for extras in the README.md.
I added one example in the install section that is used in the uv tests.
## Summary
I packaged `uv` in the official repositories:
https://archlinux.org/packages/extra/x86_64/uv/
This PR simply updates README.md to add the instructions to install the
package.
## Test Plan
None.
Specify that the command to run for Windows is for powershell
## Summary
Clarifies the usage of the command to run to install uv on Windows
(powershell only)
## Test Plan
It wasn't 😈
---------
Co-authored-by: konsti <konstin@mailbox.org>
## Summary
This opens up space to add other cache-related commands. (`uv clean`
continues to work for backwards compatibility but is hidden from the
CLI.)
