## Summary
Resolves#6913.
Add `tool.uv.build-constraint-dependencies` to pyproject.toml.
The changes are analogous to the constraint-dependencies feature
implemented in #5248.
Add documentation for `build-constraint-dependencies`
## Test Plan
Add tests for `uv lock`, `uv add`, `uv pip install` and `uv pip
compile`.
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
## Summary
This PR revives https://github.com/astral-sh/uv/pull/10017, which might
be viable now that we _don't_ enforce any platforms by default.
The basic idea here is that users can mark certain platforms as required
(empty, by default). When resolving, we ensure that the specified
platforms have wheel coverage, backtracking if not.
For example, to require that we include a version of PyTorch that
supports Intel macOS:
```toml
[project]
name = "project"
version = "0.1.0"
requires-python = ">=3.11"
dependencies = ["torch>1.13"]
[tool.uv]
required-platforms = [
"sys_platform == 'darwin' and platform_machine == 'x86_64'"
]
```
Other than that, the forking is identical to past iterations of this PR.
This would give users a way to resolve the tail of issues in #9711, but
with manual opt-in to supporting specific platforms.
Closes#11285
Closes https://github.com/astral-sh/uv/pull/11437
This changes `-p` from an alias of `--python-version` to `--python`
while retaining backwards compatibility for `--python-version`-like
fallback behavior when the requested version, e.g., `-p 3.12`, cannot be
found.
This was initially implemented with a hidden `--python-legacy` flag
which allows us to special case the short `-p` flag — unlike the
implementation in #11437. However, after further discussion, we decided
the behavior difference between `-p` and `--python` would be confusing
so now `-p` is an alias for `--python` and `--python` is special-cased
when a version is used.
Additionally, we now respect the `UV_PYTHON` environment variable, but
it is ignored when `--python-version` is set. If you want different
`--python-version` and `--python` values, you must do so explicitly. I
considered banning this, but it is valid for e.g. `--python pypy
--python-version 3.12`
Unlike https://github.com/astral-sh/uv/pull/10222, this does not respect
`UV_PYTHON` in `uv python uninstall` (continuing to require an explicit
target there) which I think is simpler and matches our `.python-version`
file behavior.
---------
Co-authored-by: Choudhry Abdullah <cabdulla@trinity.edu>
Co-authored-by: Choudhry Abdullah <choudhry347@choudhrys-air-2.trinity.local>
Co-authored-by: Aria Desires <aria.desires@gmail.com>
## Summary
The environment is located at a stable path within the cache, based on
the script's absolute path.
If a lockfile exists for the script, then we use our standard lockfile
semantics (i.e., update the lockfile if necessary, etc.); if not, we
just do a `uv pip sync` (roughly).
Example usage:
```
❯ uv init --script hello.py
Initialized script at `hello.py`
❯ uv add --script hello.py requests
Updated `hello.py`
❯ cargo run sync --script hello.py
Using script environment at: /Users/crmarsh/.cache/uv/environments-v1/hello-84e289fe3f6241a0
Resolved 5 packages in 3ms
Installed 5 packages in 12ms
+ certifi==2025.1.31
+ charset-normalizer==3.4.1
+ idna==3.10
+ requests==2.32.3
+ urllib3==2.3.0
```
Closes https://github.com/astral-sh/uv/issues/6637.
<!--
Thank you for contributing to uv! To help us out with reviewing, please
consider the following:
- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title?
- Does this pull request include references to any relevant issues?
-->
## Summary
This adds `NO_BINARY` and `NO_BINARY_PACKAGE` environment variables to
the uv CLI, allowing the user to specify packages to build from source
using environment variables. Its not a complete fix for #4291 as it does
not handle the `pip` subcommand.
## Test Plan
This was tested by running `uv sync` with various `UV_NO_BINARY` and
`UV_NO_BINARY_PACKAGE` environment variables set and checking that the
correct set of packages were compiled rather than taken from pre-built
wheels.
---------
Co-authored-by: Zanie Blue <contact@zanie.dev>
I think `UV_PROJECT_ENVIRONMENT` is too complicated for use-cases where
the user wants to sync to the active environment. I don't see a
compelling reason not to make opt-in easier. I see a lot of questions
about how to deal with this warning in the issue tracker, but it seems
painful to collect them here for posterity.
A notable behavior here — we'll treat this as equivalent to
`UV_PROJECT_ENVIRONMENT` so... if you point us to a valid virtual
environment that needs to be recreated for some reason (e.g., new Python
version request), we'll happily delete it and start over.
Since the resolver internals docs were written, we added a lot more
features to the resolver, which should be documented.
As usual, these docs are not targeted at regular users, but should give
interested readers an insight into the internals of uv and help advanced
users with especially hard resolver problems.
## Summary
Fixes a recurring typo.
## Details
There's a typo appearing in a particular sentence...
> Ignore package dependencies, instead only add those packages
explicitly listed on the command line to the resulting **the**
requirements file.
... used in:
* `crates/uv-cli/src/lib.rs`
* `crates/uv-settings-src-settings.rs`
* `docs/reference/settings.md`
* `uv.schem.json`
Docs, comments and a CLI command description seem affected.
This PR fixes it.
---------
Co-authored-by: bujnok01 <bujnok01@heiway.net>
I'm sorry, but I was writing some new content here and the inconsistent
wrapping was very hard to maintain and I didn't want to muddy the diff
there with reflowing.
I don't think we need to be strict about the reflow (I'm not sure we
even can be) but some of these were very far off from our typical wrap
length.
We'll probably end up shipping but we were moving ahead with this on the
basis that pip may not even ship this, so let's play it safe and wait
for a bit.
Ultimately this is a lot of settings plumbing and a couple minor pieces
of Actual Logic (which are so simple I have to assume there's something
missing, but maybe not!).
Note this "needlessly" use DevDependencyGroup since it costs nothing, is
more futureproof, and lets us maintain one primary interface (we just
pass `false` for all the dev arguments).
Fixes#8590Fixes#8969
<!--
Thank you for contributing to uv! To help us out with reviewing, please
consider the following:
- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title?
- Does this pull request include references to any relevant issues?
-->
## Summary
I use `uv` for automation on remote hosts and it would be useful to have
it be able to tell me the supported versions of python (for the remote
machine) in a machine readable manner so I do not need to parse `uv
python list`.
This change adds `--format (json|text)` to `uv python list` to make it's
output machine readable
Loosely related:
- https://github.com/astral-sh/uv/issues/411
## Test Plan
Manually tested via
```
# quick inspection without pretty print
cargo run -- python list --format json
```
### Short example of output (trimmed down)
Cmd: `cargo run -- python list --format json | jq '.[:2]'`
```json
[
{
"key": "cpython-3.13.1+freethreaded-linux-x86_64-gnu",
"version": "3.13.1",
"version_parts": {
"major": 3,
"minor": 13,
"patch": 1
},
"path": null,
"symlink": null,
"url": "https://github.com/astral-sh/python-build-standalone/releases/download/20241219/cpython-3.13.1%2B20241219-x86_64-unknown-linux-gnu-freethreaded%2Bpgo%2Blto-full.tar.zst",
"os": "linux",
"variant": "freethreaded",
"implementation": "cpython",
"arch": "x86_64",
"libc": "gnu"
},
{
"key": "cpython-3.13.1-linux-x86_64-gnu",
"version": "3.13.1",
"version_parts": {
"major": 3,
"minor": 13,
"patch": 1
},
"path": "/usr/bin/python3.13",
"symlink": null,
"url": null,
"os": "linux",
"variant": "default",
"implementation": "cpython",
"arch": "x86_64",
"libc": "gnu"
}
]
```
---------
Co-authored-by: John Zlotek <jzlotek@gmail.com>
## Summary
Resolves#5952
Add a `--path` option to `uv pip freeze` to be compatible with `pip
freeze`
## Test Plan
New snapshot tests
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
## Summary
You can now run `uv tree --script main.py` to show the dependency tree
for a given script. If a lockfile doesn't exist, it will create one.
Closes https://github.com/astral-sh/uv/issues/7328.
## Summary
You can now run `uv lock --script main.py` to lock a given script
(though as of this PR, the script itself isn't used anywhere).
Closes https://github.com/astral-sh/uv/issues/6318.
<!--
Thank you for contributing to uv! To help us out with reviewing, please
consider the following:
- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title?
- Does this pull request include references to any relevant issues?
-->
## Summary
Follow up to #8553
Clarifies that the `exclude-newer` setting must be a full timestamp and
not a date.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
N/A
<!-- How was it tested? -->
## Summary
This follows Ruff's design exactly: you can provide a version specifier
(like `>=0.5`), and we'll enforce it at runtime.
Closes https://github.com/astral-sh/uv/issues/8605.
## Summary
Closes#7913 by adding an optional `--description` argument to `uv init`
that fills the description field in the pyproject.toml with the supplied
arg value.
Updated `uv init` docs to describe this new optional argument.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Added snapshot tests in `uv/crates/uv/tests/it/init.rs` to test this
functionality.
<!-- How was it tested? -->
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
## Summary
`uv run --exact` will remove any unnecessary packages prior to running
the given command. (By default, `uv run` uses "inexact" semantics.)
Closes https://github.com/astral-sh/uv/issues/7838.
Build failures are one of the most common user facing failures that
aren't "obivous" errors (such as typos) or resolver errors. Currently,
they show more technical details than being focussed on this being an
error in a subprocess that is either on the side of the package or -
more likely - in the build environment, e.g. the user needs to install a
dev package or their python version is incompatible.
The new error message clearly delineates the part that's important (this
is a build backend problem) from the internals (we called this hook) and
is consistent about which part of the dist building stage failed. We
have to calibrate the exact wording of the error message some more. Most
of the implementation is working around the orphan rule, (this)error
rules and trait rules, so it came out more of a refactoring than
intended.
Example:
<!--
Thank you for contributing to uv! To help us out with reviewing, please
consider the following:
- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title?
- Does this pull request include references to any relevant issues?
-->
## Summary
The `fork-strategy` default value was overlooked in #9887.
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
Background reading: https://github.com/astral-sh/uv/issues/8157
Companion PR: https://github.com/astral-sh/pubgrub/pull/36
Requires for test coverage: https://github.com/astral-sh/packse/pull/230
When two packages A and B conflict, we have the option to choose a lower
version of A, or a lower version of B. Currently, we determine this by
the order we saw a package (assuming equal specificity of the
requirement): If we saw A before B, we pin A until all versions of B are
exhausted. This can lead to undesirable outcomes, from cases where it's
just slow (sentry) to others cases without lower bounds where be
backtrack to a very old version of B. This old version may fail to build
(terminating the resolution), or it's a version so old that it doesn't
depend on A (or the shared conflicting package) anymore - but also is
too old for the user's application (fastapi). #8157 collects such cases,
and the `wrong-backtracking` packse scenario contains a minimized
example.
We try to solve this by tracking which packages are "A"s, culprits, and
"B"s, affected, and manually interfering with project selection and
backtracking. Whenever a version we just chose is rejected, we give the
current package a counter for being affected, and the package it
conflicted with a counter for being a culprit. If a package accumulates
more counts than a threshold, we reprioritize: Undecided after the
culprits, after the affected, after packages that only have a single
version (URLs, `==<version>`). We then ask pubgrub to backtrack just
before the culprit. Due to the changed priorities, we now select package
B, the affected, instead of package A, the culprit.
To do this efficiently, we ask pubgrub for the incompatibility that
caused backtracking, or just the last version to be discarded (due to
its dependencies). For backtracking, we use the last incompatibility
from unit propagation as a heuristic. When a version is discarded
because one of its dependencies conflicts with the partial solution, the
incompatibility tells us the package in the partial solution that
conflicted.
We only backtrack once per package, on the first time it passes the
threshold. This prevents backtracking loops in which we make the same
decisions over and over again. But we also changed the priority, so that
we shouldn't take the same path even after the one time we backtrack (it
would defeat the purpose of this change).
There are some parameters that can be tweaked: Currently, the threshold
is set to 5, which feels not too eager with so me of the conflicts that
we want to tolerate but also changes strategies quickly. The relative
order of the new priorities can also be changed, as for each (A, B) pair
the priority of B is afterwards lower than that for A. Currently,
culprits capture conflict for the whole package, but we could limit that
to a specific version. We could discard conflict counters after
backtracking instead of keeping them eternally as we do now. Note that
we're always taking about pairs (A, B), but in practice we track
individual packages, not pairs.
A case that we wouldn't capture is when B is only introduced to the
dependency graph after A, but I think that would require cyclical
dependency for A and B to conflict? There may also be cases where
looking at the last incompatibility is insufficient.
Another example that we can't repair with prioritization is
urllib3/boto3/botocore: We actually have to check all the newer versions
of boto3 and botocore to identify the version that allows with the older
urllib3, no shortcuts allowed.
```
urllib3<1.25.4
boto3
```
All examples I tested were cases with two packages where we only had to
switch the order, so I've abstracted them into a single packse case.
This PR changes the resolution for certain paths, and there is the risk
for regressions.
Fixes#8157
---
All tested examples improved.
Input fastapi:
```text
starlette<=0.36.0
fastapi<=0.115.2
```
```
# BEFORE
$ uv pip --no-progress compile -p 3.11 --exclude-newer 2024-10-01 --no-annotate debug/fastapi.txt
annotated-types==0.7.0
anyio==4.6.0
fastapi==0.1.17
idna==3.10
pydantic==2.9.2
pydantic-core==2.23.4
sniffio==1.3.1
starlette==0.36.0
typing-extensions==4.12.2
# AFTER
$ cargo run --profile fast-build --no-default-features pip compile -p 3.11 --no-progress --exclude-newer 2024-10-01 --no-annotate debug/fastapi.txt
annotated-types==0.7.0
anyio==4.6.0
fastapi==0.109.1
idna==3.10
pydantic==2.9.2
pydantic-core==2.23.4
sniffio==1.3.1
starlette==0.35.1
typing-extensions==4.12.2
```
Input xarray:
```text
xarray[accel]
```
```
# BEFORE
$ uv pip --no-progress compile -p 3.11 --exclude-newer 2024-10-01 --no-annotate debug/xarray-accel.txt
bottleneck==1.4.0
flox==0.9.13
llvmlite==0.36.0
numba==0.53.1
numbagg==0.8.2
numpy==2.1.1
numpy-groupies==0.11.2
opt-einsum==3.4.0
packaging==24.1
pandas==2.2.3
python-dateutil==2.9.0.post0
pytz==2024.2
scipy==1.14.1
setuptools==75.1.0
six==1.16.0
toolz==0.12.1
tzdata==2024.2
xarray==2024.9.0
# AFTER
$ cargo run --profile fast-build --no-default-features pip compile -p 3.11 --no-progress --exclude-newer 2024-10-01 --no-annotate debug/xarray-accel.txt
bottleneck==1.4.0
flox==0.9.13
llvmlite==0.43.0
numba==0.60.0
numbagg==0.8.2
numpy==2.0.2
numpy-groupies==0.11.2
opt-einsum==3.4.0
packaging==24.1
pandas==2.2.3
python-dateutil==2.9.0.post0
pytz==2024.2
scipy==1.14.1
six==1.16.0
toolz==0.12.1
tzdata==2024.2
xarray==2024.9.0
```
Input sentry: The resolution is identical, but arrived at much faster:
main tries 69 versions (sentry-kafka-schemas: 63), PR tries 12 versions
(sentry-kafka-schemas: 6; 5 times conflicting, then once the right
version).
```text
python-rapidjson<=1.20,>=1.4
sentry-kafka-schemas<=0.1.113,>=0.1.50
```
```
# BEFORE
$ uv pip --no-progress compile -p 3.11 --exclude-newer 2024-10-01 --no-annotate debug/sentry.txt
fastjsonschema==2.20.0
msgpack==1.1.0
python-rapidjson==1.8
pyyaml==6.0.2
sentry-kafka-schemas==0.1.111
typing-extensions==4.12.2
# AFTER
$ cargo run --profile fast-build --no-default-features pip compile -p 3.11 --no-progress --exclude-newer 2024-10-01 --no-annotate debug/sentry.txt
fastjsonschema==2.20.0
msgpack==1.1.0
python-rapidjson==1.8
pyyaml==6.0.2
sentry-kafka-schemas==0.1.111
typing-extensions==4.12.2
```
Input apache-beam
```text
# Run on Python 3.10
dill<0.3.9,>=0.2.2
apache-beam<=2.49.0
```
```
# BEFORE
$ uv pip --no-progress compile -p 3.10 --exclude-newer 2024-10-01 --no-annotate debug/apache-beam.txt
× Failed to download and build `apache-beam==2.0.0`
╰─▶ Build backend failed to determine requirements with `build_wheel()` (exit status: 1)
# AFTER
$ cargo run --profile fast-build --no-default-features pip compile -p 3.10 --no-progress --exclude-newer 2024-10-01 --no-annotate debug/apache-beam.txt
apache-beam==2.49.0
certifi==2024.8.30
charset-normalizer==3.3.2
cloudpickle==2.2.1
crcmod==1.7
dill==0.3.1.1
dnspython==2.6.1
docopt==0.6.2
fastavro==1.9.7
fasteners==0.19
grpcio==1.66.2
hdfs==2.7.3
httplib2==0.22.0
idna==3.10
numpy==1.24.4
objsize==0.6.1
orjson==3.10.7
proto-plus==1.24.0
protobuf==4.23.4
pyarrow==11.0.0
pydot==1.4.2
pymongo==4.10.0
pyparsing==3.1.4
python-dateutil==2.9.0.post0
pytz==2024.2
regex==2024.9.11
requests==2.32.3
six==1.16.0
typing-extensions==4.12.2
urllib3==2.2.3
zstandard==0.23.0
```
ChiLin Chiu
Chao Ning
Charlie Marsh
Zanie Blue
Alex Lowe
konsti
Aria Desires
titipoco
Mathieu Kniewallner
Eric Mark Martin
Trevor Manz
Arnav Gupta
Richard Höchenberger