## Summary
Similar to #5852 and a bunch of related PRs -- trying to move rules that
rely on point-in-time semantic analysis to _after_ the semantic model
building.
## Summary
Implements `PYI017` or `Y017` from `flake8-pyi` plug-in. Mirrors
[upstream
implementation](ceab86d16b/pyi.py (L1039-L1048)).
It checks for any assignment with more than 1 target or an assignment to
anything other than a name, and raises a violation for these in stub
files.
Couldn't find a clear and concise explanation for why this is to be
avoided and what is preferred for attribute cases like:
```python
a.b = int
```
So welcome some input there, to learn and to finish up the docs.
## Test Plan
Added test cases from upstream plug-in in a fixture (both `.py` and
`.pyi`). Added a few more.
## Issue link
Refers: https://github.com/astral-sh/ruff/issues/848
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## Summary
- Remove space when start of slice is empty
- Treat unary op except `not` as simple expression
## Test Plan
Add some simple tests for unary op expressions in slice
Closes#5673
This shrinks a good bit more than previously, which was helpful for all
the formatter bugs. fwiw i treat this as a very ad-hoc script since it's
mainly my ecosystem bug processing companion.
## Summary
It can happen that we can't read a file (a python file, a jupyter
notebook or pyproject.toml), which needs to be handled and handled
consistently for all file types. Instead of using `Err` or `error!`, we
emit E602 with the io error as message and continue. This PR makes sure
we handle all three cases consistently, emit E602.
I'm not convinced that it should be possible to disable io errors, but
we now handle the regular case consistently and at least print warning
consistently.
I went with `warn!` but i can change them all to `error!`, too.
It also checks the error case when a pyproject.toml is not readable. The
error message is not very helpful, but it's now a bit clearer that
actually ruff itself failed instead vs this being a diagnostic.
## Examples
This is how an Err of `run` looks now:
With an unreadable file and `IOError` disabled:
(we lint zero files but count files before linting not during so we exit
0)
I'm not sure if it should (or if we should take a different path with
manual ExitStatus), but this currently also triggers when `files` is
empty:
## Test Plan
Unix only: Create a temporary directory with files with permissions
`000` (not readable by the owner) and run on that directory. Since this
breaks the assumptions of most of the test code (single file, `ruff`
instead of `ruff_cli`), the test code is rather cumbersome and looks a
bit misplaced; i'm happy about suggestions to fit it in closer with the
other tests or streamline it in other ways. I added another test for
when the entire directory is not readable.
## Summary
Completes documentation for the `flake8-fixme` (`FIX`) ruleset. Related
to #2646.
Tweaks the violation message. For example,
```
FIX001 Line contains FIXME
```
becomes
```
FIX001 Line contains FIXME, consider resolving the issue
```
This is because the previous message was unclear if it was warning
against the use of FIXME tags per se, or the code the FIXME tag was
annotating.
## Test Plan
`cargo test && python scripts/check_docs_formatted.py`
## Summary
Checks for `typehint.TypeAlias` annotation in type aliases. See
[original
source](https://github.com/PyCQA/flake8-pyi/blob/main/pyi.py#L1085).
```
$ flake8 --select Y026 crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:4:1: Y026 Use typing_extensions.TypeAlias for type aliases, e.g. "NewAny: TypeAlias = Any"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:5:1: Y026 Use typing_extensions.TypeAlias for type aliases, e.g. "OptinalStr: TypeAlias = typing.Optional[str]"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:6:1: Y026 Use typing_extensions.TypeAlias for type aliases, e.g. "Foo: TypeAlias = Literal['foo']"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:7:1: Y026 Use typing_extensions.TypeAlias for type aliases, e.g. "IntOrStr: TypeAlias = int | str"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:8:1: Y026 Use typing_extensions.TypeAlias for type aliases, e.g. "AliasNone: TypeAlias = None"
```
```
$ ./target/debug/ruff --select PYI026 crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi --no-cache
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:4:1: PYI026 Use `typing.TypeAlias` for type aliases in `NewAny`, e.g. "NewAny: typing.TypeAlias = Any"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:5:1: PYI026 Use `typing.TypeAlias` for type aliases in `OptinalStr`, e.g. "OptinalStr: typing.TypeAlias = typing.Optional[str]"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:6:1: PYI026 Use `typing.TypeAlias` for type aliases in `Foo`, e.g. "Foo: typing.TypeAlias = Literal["foo"]"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:7:1: PYI026 Use `typing.TypeAlias` for type aliases in `IntOrStr`, e.g. "IntOrStr: typing.TypeAlias = int | str"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI026.pyi:8:1: PYI026 Use `typing.TypeAlias` for type aliases in `AliasNone`, e.g. "AliasNone: typing.TypeAlias = None"
Found 5 errors.
```
ref: #848
## Test Plan
Snapshots, manual runs of flake8.
## Summary
As part of my continued quest to separate semantic model-building from
diagnostic emission, this PR moves our unresolved-reference rules to a
deferred pass. So, rather than emitting diagnostics as we encounter
unresolved references, we now track those unresolved references on the
semantic model (just like resolved references), and after traversal,
emit the relevant rules for any unresolved references.
## Summary
Add known problems to `compare-to-empty-string` documentation. Related
to #5873.
Tweaked the example in the documentation to be a tad more concise and
correct (that the rule is most applicable when comparing to a `str`
variable).
## Test Plan
`python scripts/check_docs_formatted.py`
## Summary
This PR moves two rules (`invalid-all-format` and `invalid-all-object`)
out of the name-binding phase, and into the dedicated pass over all
bindings that occurs at the end of the `Checker`. This is part of my
continued quest to separate the semantic model-building logic from the
actual rule enforcement.
**Summary** Previously, `RUF014` would be part of ruff.schema.json
depending on whether or not the `unreachable-code` feature was active.
This caused problems for contributors who got unrelated RUF014 changes
when updating the schema without the feature active.
An alternative would be to always add `RUF014`.
**Test plan** `cargo dev generate-all` and `cargo run --bin ruff_dev
--features unreachable-code -- generate-all` now have the same effect.
## Summary
This crate now contains utilities for dealing with trivia more broadly:
whitespace, newlines, "simple" trivia lexing, etc. So renaming it to
reflect its increased responsibilities.
To avoid conflicts, I've also renamed `Token` and `TokenKind` to
`SimpleToken` and `SimpleTokenKind`.
## Summary
The vector of names here is immutable -- we never push to it after
initialization. Boxing reduces the size of the variant from 32 bytes to
24 bytes. (See:
https://nnethercote.github.io/perf-book/type-sizes.html#boxed-slices.)
It doesn't make a difference here, since it's not the largest variant,
but it still seems like a prudent change (and I was considering adding
another field to this variant, though I may no longer do so).
**Summary** This replaces the `todo!()` with a type alias stub in the
formatter. I added the tests from
704eb40108/parser/src/parser.rs (L901-L936)
as ruff python formatter tests.
**Test Plan** None, testing is part of the actual implementation
**Summary** Fix the formatter crash with `x[(1) :: ]` and related code.
**Problem** For assigning comments in slices in subscripts, we need to
find the positions of the colons to assign comments before and after the
colon to the respective lower/upper/step node (or dangling in that
section). Formatting `x[(1) :: ]` was broken because we were looking for
a `:` after the `1` but didn't consider that there could be a `)`
outside the range of the lower node, which contains just the `1` and no
optional parentheses.
**Solution** Use the simple tokenizer directly and skip all closing
parentheses.
**Test Plan** I added regression tests.
Closes#5733
**Summary** Add a static string error message to the formatter syntax
error so we can disambiguate where the syntax error came from
**Test Plan** No fixed tests, we don't expect this to occur, but it
helped with transformers syntax error debugging:
```
Error: Failed to format node
Caused by:
syntax error: slice first colon token was not a colon
```
## Summary
No behavior change, but this is in theory more efficient, since we can
just iterate over the flat `Binding` vector rather than having to
iterate over binding chains via the `Scope`.
## Summary
This PR moves the "unused exception" rule out of the visitor and into a
deferred check. When we can base rules solely on the semantic model, we
probably should, as it greatly simplifies the `Checker` itself.
## Summary
The `SemanticModel` currently stores the "body" of a given `Suite`,
along with the current statement index. This is used to support "next
sibling" queries, but we only use this in exactly one place -- the rule
that simplifies constructs like this to `any` or `all`:
```python
for x in y:
if x == 0:
return True
return False
```
Instead of tracking the state, we can just do a (slightly more
expensive) traversal, by finding the node within its parent and
returning the next node in the body.
Note that we'll only have to do this extremely rarely -- namely, for
functions that contain something like:
```python
for x in y:
if x == 0:
return True
```
## Summary
The motivation here is that it will make this rule easier to rewrite as
a deferred check. Right now, we can't run this rule in the deferred
phase, because it depends on the `except_handler` to power its autofix.
Instead of lexing the `except_handler`, we can use the `SimpleTokenizer`
from the formatter, and just lex forwards and backwards.
For context, this rule detects the unused `e` in:
```python
try:
pass
except ValueError as e:
pass
```
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Resolve#5854
## Test Plan
<!-- How was it tested? -->
New test cases
---------
Co-authored-by: konsti <konstin@mailbox.org>
## Summary
This PR just naively unrolls `collect_call_path` to handle attribute
resolutions of up to eight segments. In profiling via Instruments, it
seems to be about 4x faster for a very hot code path (4% of total
execution time on `main`, 1% here).
Profiling by running `RAYON_NUM_THREADS=1 cargo instruments -t time
--profile release-debug --time-limit 10000 -p ruff_cli -o
FromSlice.trace -- check crates/ruff/resources/test/cpython --silent -e
--no-cache --select ALL`, and modifying the linter to loop infinitely up
to the specified time (10 seconds) to increase sample size.
Before:
<img width="1792" alt="Screen Shot 2023-07-15 at 5 13 34 PM"
src="https://github.com/astral-sh/ruff/assets/1309177/4a8b0b45-8b67-43e9-af5e-65b326928a8e">
After:
<img width="1792" alt="Screen Shot 2023-07-15 at 8 38 51 PM"
src="https://github.com/astral-sh/ruff/assets/1309177/d8829159-2c79-4a49-ab3c-9e4e86f5b2b1">
Charlie Marsh
qdegraaf
Luc Khai Hai
Micha Reiser
Tom Kuson
konsti
Chris Pryer
Simon Brugman
Victor Hugo Gomes
Zanie Blue
David Cain
David Szotten
Dhruv Manilawala
Nikita Sobolev
Harutaka Kawamura