## Summary
Avoid serializing and writing the lockfile if a cheap comparison shows
that the contents have not changed.
## Test Plan
Shaves ~10ms off of https://github.com/astral-sh/uv/issues/4860 for me.
```
➜ transformers hyperfine "../../uv/target/profiling/uv lock" "../../uv/target/profiling/baseline lock" --warmup 3
Benchmark 1: ../../uv/target/profiling/uv lock
Time (mean ± σ): 130.5 ms ± 2.5 ms [User: 130.3 ms, System: 85.0 ms]
Range (min … max): 126.8 ms … 136.9 ms 23 runs
Benchmark 2: ../../uv/target/profiling/baseline lock
Time (mean ± σ): 140.5 ms ± 5.0 ms [User: 142.8 ms, System: 85.5 ms]
Range (min … max): 133.2 ms … 153.3 ms 21 runs
Summary
../../uv/target/profiling/uv lock ran
1.08 ± 0.04 times faster than ../../uv/target/profiling/baseline lock
```
Adds a nice hint at the bottom of `uv help` output indicating how to get
more details about a specific command, roughly matching Cargo's
interface.
We use the short help and skip the pager for the root `uv help` since
it's intended to be a landing page for the help interface more than an
in-depth display. This also matches Cargo, though I like that they have
the global options above the commands and I've not changed that here.
## Summary
We now recreate the environment in `uv sync`, `uv tool install`, and `uv
tool run` if the underlying interpreter has been removed.
Closes https://github.com/astral-sh/uv/issues/4933.
This is an attempt to solve https://github.com/astral-sh/uv/issues/ by
applying the extra marker of the requirement to overrides and
constraints.
Say in `a` we have a requirements
```
b==1; python_version < "3.10"
c==1; extra == "feature"
```
and overrides
```
b==2; python_version < "3.10"
b==3; python_version >= "3.10"
c==2; python_version < "3.10"
c==3; python_version >= "3.10"
```
Our current strategy is to discard the markers in the original
requirements. This means that on 3.12 for `a` we install `b==3`, but it
also means that we add `c` to `a` without `a[feature]`, causing #4826.
With this PR, the new requirement become,
```
b==2; python_version < "3.10"
b==3; python_version >= "3.10"
c==2; python_version < "3.10" and extra == "feature"
c==3; python_version >= "3.10" and extra == "feature"
```
allowing to override markers while preserving optional dependencies as
such.
Fixes#4826
## Summary
Allows `--all` as an alternative to specifying specific targets.
## Test Plan
Verified that `cargo run python uninstall` still fails.
```
❯ cargo run python uninstall --all
Compiling uv-cli v0.0.1 (/Users/crmarsh/workspace/puffin/crates/uv-cli)
Compiling uv v0.2.23 (/Users/crmarsh/workspace/puffin/crates/uv)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.86s
Running `target/debug/uv python uninstall --all`
warning: `uv python uninstall` is experimental and may change without warning.
Searching for Python installations
Found existing installation: cpython-3.9.18-macos-aarch64-none
Found existing installation: cpython-3.8.18-macos-aarch64-none
Found existing installation: cpython-3.8.12-macos-aarch64-none
Found existing installation: cpython-3.12.1-macos-aarch64-none
Found existing installation: cpython-3.11.7-macos-aarch64-none
Found existing installation: cpython-3.10.13-macos-aarch64-none
Uninstalled cpython-3.10.13-macos-aarch64-none
Uninstalled cpython-3.11.7-macos-aarch64-none
Uninstalled cpython-3.12.1-macos-aarch64-none
Uninstalled cpython-3.8.12-macos-aarch64-none
Uninstalled cpython-3.8.18-macos-aarch64-none
Uninstalled cpython-3.9.18-macos-aarch64-none
Uninstalled 6 versions in 479ms
```
admittedly, nitpick PR but i initially misread the trailing dot in
```
# Create a virtual environment at .venv.
```
as part of the directory name, i.e. that the env would be placed in
`.venv.`
I feel like I'm always drowning in the help output from `uv` because we
have so many options.
I basically agree with the commentary in
https://github.com/clap-rs/clap/issues/4687 that having different
behaviors for `-h` and `--help` is surprising. I think `--help` is more
obvious for users and I want to optimize for that experience.
This roughly matches the help menus in Cargo and pip.
The `uv help` command can be used for long help. In #4906 and #4909 we
improve that command.
Extends #4904 which adds test cases for the existing behavior.
## Summary
In marker normalization, we now remove any markers that are redundant
with the `requires-python` specifier (i.e., always true for the given
Python requirement).
For example, given `iniconfig ; python_version >= '3.7'`, we can remove
the `python_version >= '3.7'` marker when resolving with
`--python-version 3.8`.
Closes#4852.
## Summary
Given `python_version != '3.8' and python_version < '3.10'`, the first
term was expanded to `python_version < '3.8'` and `python_version >
'3.8'`. We then AND'd all three terms together. We don't seem to have a
way to differentiate between the terms to AND and the terms to OR in the
normalization code (it all gets flattened together), so instead this PR
expands the expressions at the leaf level and then flattens them at the
level above when appropriate.
Closes https://github.com/astral-sh/uv/issues/4910.
## Summary
Closes https://github.com/astral-sh/uv/issues/4915.
```
error: No interpreter found for Python 3.12.4 in virtual environments, managed installations, or system path
```
## Summary
Closes https://github.com/astral-sh/uv/issues/4848.
## Test Plan
```
> cargo run -- run -vv --preview --isolated --python 3.12.4 python -V
error: No interpreter found for Python 3.12.4 in virtual environments or managed installations or system path
```
## Summary
More marker simplification:
- Filters out redundant subtrees based on outer expressions, e.g. `a and (a or
b)` simplifies to `a`.
- Flattens nested trees internally, e.g. `(a and b) and c`
Resolves https://github.com/astral-sh/uv/issues/4536.
The PR #4707 introduced the notion of "version narrowing," where a
Requires-Python constraint was _possibly_ narrowed whenever the
universal resolver created a fork. The version narrowing would occur
when the fork was a result of a marker expression on `python_version`
that is *stricter* than the configured `Requires-Python` (via, say,
`pyproject.toml`).
The crucial conceptual change made by #4707 is therefore that
`Requires-Python` is no longer an invariant configuration of resolution,
but rather a mutable constraint that can vary from fork to fork. This in
turn can result in some cases, such as in #4885, where different
versions of dependencies are selected. We aren't sure whether we can fix
those or not, with version narrowing, so for now, we do this revert to
restore the previous behavior and we'll try to address the version
narrowing some other time.
This also adds the case from #4885 as a regression test, ensuring that
we don't break that in the future. I confirmed that with version
narrowing, this test outputs duplicate distributions. Without narrowing,
there are no duplicates.
Ref #4707, Fixes#4885
## Summary
Attempts to make the CLI output a little more consistent with the `pip`
interface. I opted to make the Python versions, requests, and filenames
blue, and the keys green, but open to opinions on that. (We use blue for
filenames elsewhere.)
Closes#4813.
Closes https://github.com/astral-sh/uv/issues/4814.
This test was, I believe, relying on the XDG_DATA_HOME environment
variable not being set. When it is set, as is the case in my
environment, `uv tool run` will respect it and install `black` for this
particular test into my actual XDG_DATA_HOME directory. We fix this by
setting `XDG_DATA_HOME` explicitly.
## Summary
The existing tab input sometimes leads to misalignment on my machine, I
think it has to do with breakpoints?
This PR computes the width explicitly, and then pads each line. I also
added some colors to the RHS. I think it makes it easier to scan, but
don't feel strongly.
By using `Box::pin(run())` we can reduce the artificial stack size for
running tests on windows in debug mode from 8MB to 2MB. I've checked and
1MB/no custom stack size still fail tests, e.g.
`add_workspace_editable`.
This test is failing most times for me when running nextest locally,
failing the overall test run, so i'm deactivating it for now. I'm still
not sure what the root cause here is. It seems to have something to do
with python stdin not being ready immediately after we spawn the process
and us being too fast.
