An extremely fast Python package and project manager, written in Rust.
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John Mumm c19a294a48
Add DisplaySafeUrl newtype to prevent leaking of credentials by default (#13560)
Prior to this PR, there were numerous places where uv would leak
credentials in logs. We had a way to mask credentials by calling methods
or a recently-added `redact_url` function, but this was not secure by
default. There were a number of other types (like `GitUrl`) that would
leak credentials on display.

This PR adds a `DisplaySafeUrl` newtype to prevent leaking credentials
when logging by default. It takes a maximalist approach, replacing the
use of `Url` almost everywhere. This includes when first parsing config
files, when storing URLs in types like `GitUrl`, and also when storing
URLs in types that in practice will never contain credentials (like
`DirectorySourceUrl`). The idea is to make it easy for developers to do
the right thing and for the compiler to support this (and to minimize
ever having to manually convert back and forth). Displaying credentials
now requires an active step. Note that despite this maximalist approach,
the use of the newtype should be zero cost.

One conspicuous place this PR does not use `DisplaySafeUrl` is in the
`uv-auth` crate. That would require new clones since there are calls to
`request.url()` that return a `&Url`. One option would have been to make
`DisplaySafeUrl` wrap a `Cow`, but this would lead to lifetime
annotations all over the codebase. I've created a separate PR based on
this one (#13576) that updates `uv-auth` to use `DisplaySafeUrl` with
one new clone. We can discuss the tradeoffs there.

Most of this PR just replaces `Url` with `DisplaySafeUrl`. The core is
`uv_redacted/lib.rs`, where the newtype is implemented. To make it
easier to review the rest, here are some points of note:

* `DisplaySafeUrl` has a `Display` implementation that masks
credentials. Currently, it will still display the username when there is
both a username and password. If we think is the wrong choice, it can
now be changed in one place.
* `DisplaySafeUrl` has a `remove_credentials()` method and also a
`.to_string_with_credentials()` method. This allows us to use it in a
variety of scenarios.
* `IndexUrl::redacted()` was renamed to
`IndexUrl::removed_credentials()` to make it clearer that we are not
masking.
* We convert from a `DisplaySafeUrl` to a `Url` when calling `reqwest`
methods like `.get()` and `.head()`.
* We convert from a `DisplaySafeUrl` to a `Url` when creating a
`uv_auth::Index`. That is because, as mentioned above, I will be
updating the `uv_auth` crate to use this newtype in a separate PR.
* A number of tests (e.g., in `pip_install.rs`) that formerly used
filters to mask tokens in the test output no longer need those filters
since tokens in URLs are now masked automatically.
* The one place we are still knowingly writing credentials to
`pyproject.toml` is when a URL with credentials is passed to `uv add`
with `--raw`. Since displaying credentials is no longer automatic, I
have added a `to_string_with_credentials()` method to the `Pep508Url`
trait. This is used when `--raw` is passed. Adding it to that trait is a
bit weird, but it's the simplest way to achieve the goal. I'm open to
suggestions on how to improve this, but note that because of the way
we're using generic bounds, it's not as simple as just creating a
separate trait for that method.
2025-05-27 00:05:30 +02:00
.cargo Don't build uv-dev by default (#6827) 2024-08-29 15:44:13 -04:00
.config
.github Stack traces from Windows CI crashes (#13656) 2025-05-26 22:22:42 +02:00
assets
changelogs Bump version to 0.7.0 and write changelog (#13201) 2025-04-29 16:37:00 -05:00
crates Add DisplaySafeUrl newtype to prevent leaking of credentials by default (#13560) 2025-05-27 00:05:30 +02:00
docs Bump version to 0.7.8 (#13629) 2025-05-23 19:13:28 -04:00
ecosystem Remove av pin in transformers (#13518) 2025-05-18 19:59:34 -04:00
python/uv A minimal build backend for uv: uv_build (#11446) 2025-03-06 13:27:20 -06:00
scripts Add downloading of GraalPy (#13172) 2025-05-06 11:02:27 -05:00
.editorconfig Ignore UV_CACHE_DIR in help tests (#7895) 2024-10-04 09:41:25 -05:00
.gitattributes Mark .inc files as Rust for GitHub Linguist (#9890) 2024-12-13 22:17:23 +00:00
.gitignore Optimize Version display (#13643) 2025-05-26 15:17:07 +02:00
.ignore github: include /.github/ in ripgrep searches by default (#12243) 2025-03-17 12:13:49 -05:00
.pre-commit-config.yaml Update pre-commit hook astral-sh/ruff-pre-commit to v0.11.11 (#13646) 2025-05-26 13:29:49 +02:00
.prettierignore Generate environment variables doc from code (#8493) 2024-11-03 08:31:38 -06:00
.python-versions Bump pinned Python versions (#12515) 2025-03-27 20:16:10 +00:00
_typos.toml
BENCHMARKS.md Update BENCHMARKS.md (#6258) 2024-08-20 16:42:57 +00:00
Cargo.lock Add DisplaySafeUrl newtype to prevent leaking of credentials by default (#13560) 2025-05-27 00:05:30 +02:00
Cargo.toml Update PubGrub to 06ec5a5 (#13616) 2025-05-23 13:51:43 +00:00
CHANGELOG.md Bump version to 0.7.8 (#13629) 2025-05-23 19:13:28 -04:00
clippy.toml Use fs_err for paths in symlinking errors (#13303) 2025-05-05 16:29:27 +00:00
CONTRIBUTING.md Use consistent commas around i.e. and e.g. (#12157) 2025-03-13 23:42:10 +00:00
Dockerfile Explicitly install the rust toolchain before the target during Docker builds (#11936) 2025-03-03 17:17:56 -06:00
LICENSE-APACHE Update copyright year (#10297) 2025-01-04 18:31:36 +00:00
LICENSE-MIT Update copyright year (#10297) 2025-01-04 18:31:36 +00:00
mkdocs.insiders.yml Watch for changes to the template file during documentation serve (#9244) 2024-11-19 22:39:38 -06:00
mkdocs.public.yml Move content from the mkdocs.public.yml into the template (#11246) 2025-02-05 16:13:46 +00:00
mkdocs.template.yml Revert "[docs] Fix Publishing Packages, Next = "Index"" (#13555) 2025-05-20 10:35:08 -04:00
PIP_COMPATIBILITY.md Move pip compatibility guide to the documentation (#6213) 2024-08-20 11:31:46 -05:00
pyproject.toml Bump version to 0.7.8 (#13629) 2025-05-23 19:13:28 -04:00
README.md Fix broken anchors in readme and docs index (#11338) 2025-02-08 15:21:08 +00:00
ruff.toml
rust-toolchain.toml Bump version to 0.7.6 (#13537) 2025-05-19 19:46:11 -04:00
SECURITY.md Add CVE disclosure to security policy (#11037) 2025-01-28 14:36:53 -06:00
STYLE.md Improve and fix some documents (#8749) 2024-11-01 09:44:04 -04:00
uv.schema.json Build backend: Support stubs packages (#13563) 2025-05-22 19:02:17 +02:00

uv

uv image image image Actions status Discord

An extremely fast Python package and project manager, written in Rust.

Shows a bar chart with benchmark results.

Installing Trio's dependencies with a warm cache.

Highlights

uv is backed by Astral, the creators of Ruff.

Installation

Install uv with our standalone installers:

# On macOS and Linux.
curl -LsSf https://astral.sh/uv/install.sh | sh
# On Windows.
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

Or, from PyPI:

# With pip.
pip install uv
# Or pipx.
pipx install uv

If installed via the standalone installer, uv can update itself to the latest version:

uv self update

See the installation documentation for details and alternative installation methods.

Documentation

uv's documentation is available at docs.astral.sh/uv.

Additionally, the command line reference documentation can be viewed with uv help.

Features

Projects

uv manages project dependencies and environments, with support for lockfiles, workspaces, and more, similar to rye or poetry:

$ uv init example
Initialized project `example` at `/home/user/example`

$ cd example

$ uv add ruff
Creating virtual environment at: .venv
Resolved 2 packages in 170ms
   Built example @ file:///home/user/example
Prepared 2 packages in 627ms
Installed 2 packages in 1ms
 + example==0.1.0 (from file:///home/user/example)
 + ruff==0.5.0

$ uv run ruff check
All checks passed!

$ uv lock
Resolved 2 packages in 0.33ms

$ uv sync
Resolved 2 packages in 0.70ms
Audited 1 package in 0.02ms

See the project documentation to get started.

uv also supports building and publishing projects, even if they're not managed with uv. See the publish guide to learn more.

Scripts

uv manages dependencies and environments for single-file scripts.

Create a new script and add inline metadata declaring its dependencies:

$ echo 'import requests; print(requests.get("https://astral.sh"))' > example.py

$ uv add --script example.py requests
Updated `example.py`

Then, run the script in an isolated virtual environment:

$ uv run example.py
Reading inline script metadata from: example.py
Installed 5 packages in 12ms
<Response [200]>

See the scripts documentation to get started.

Tools

uv executes and installs command-line tools provided by Python packages, similar to pipx.

Run a tool in an ephemeral environment using uvx (an alias for uv tool run):

$ uvx pycowsay 'hello world!'
Resolved 1 package in 167ms
Installed 1 package in 9ms
 + pycowsay==0.0.0.2
  """

  ------------
< hello world! >
  ------------
   \   ^__^
    \  (oo)\_______
       (__)\       )\/\
           ||----w |
           ||     ||

Install a tool with uv tool install:

$ uv tool install ruff
Resolved 1 package in 6ms
Installed 1 package in 2ms
 + ruff==0.5.0
Installed 1 executable: ruff

$ ruff --version
ruff 0.5.0

See the tools documentation to get started.

Python versions

uv installs Python and allows quickly switching between versions.

Install multiple Python versions:

$ uv python install 3.10 3.11 3.12
Searching for Python versions matching: Python 3.10
Searching for Python versions matching: Python 3.11
Searching for Python versions matching: Python 3.12
Installed 3 versions in 3.42s
 + cpython-3.10.14-macos-aarch64-none
 + cpython-3.11.9-macos-aarch64-none
 + cpython-3.12.4-macos-aarch64-none

Download Python versions as needed:

$ uv venv --python 3.12.0
Using Python 3.12.0
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate

$ uv run --python pypy@3.8 -- python --version
Python 3.8.16 (a9dbdca6fc3286b0addd2240f11d97d8e8de187a, Dec 29 2022, 11:45:30)
[PyPy 7.3.11 with GCC Apple LLVM 13.1.6 (clang-1316.0.21.2.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>>

Use a specific Python version in the current directory:

$ uv python pin 3.11
Pinned `.python-version` to `3.11`

See the Python installation documentation to get started.

The pip interface

uv provides a drop-in replacement for common pip, pip-tools, and virtualenv commands.

uv extends their interfaces with advanced features, such as dependency version overrides, platform-independent resolutions, reproducible resolutions, alternative resolution strategies, and more.

Migrate to uv without changing your existing workflows — and experience a 10-100x speedup — with the uv pip interface.

Compile requirements into a platform-independent requirements file:

$ uv pip compile docs/requirements.in \
   --universal \
   --output-file docs/requirements.txt
Resolved 43 packages in 12ms

Create a virtual environment:

$ uv venv
Using Python 3.12.3
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate

Install the locked requirements:

$ uv pip sync docs/requirements.txt
Resolved 43 packages in 11ms
Installed 43 packages in 208ms
 + babel==2.15.0
 + black==24.4.2
 + certifi==2024.7.4
 ...

See the pip interface documentation to get started.

Platform support

See uv's platform support document.

Versioning policy

See uv's versioning policy document.

Contributing

We are passionate about supporting contributors of all levels of experience and would love to see you get involved in the project. See the contributing guide to get started.

Acknowledgements

uv's dependency resolver uses PubGrub under the hood. We're grateful to the PubGrub maintainers, especially Jacob Finkelman, for their support.

uv's Git implementation is based on Cargo.

Some of uv's optimizations are inspired by the great work we've seen in pnpm, Orogene, and Bun. We've also learned a lot from Nathaniel J. Smith's Posy and adapted its trampoline for Windows support.

License

uv is licensed under either of

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in uv by you, as defined in the Apache-2.0 license, shall be dually licensed as above, without any additional terms or conditions.