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## Summary
Part of #2331 |
[#18763](https://github.com/astral-sh/ruff/pull/18763#issuecomment-2988340436)
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
update snapshots
<!-- How was it tested? -->
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
I noticed this while working on #18972. If the string targeted by
[quoted-type-alias
(TC008)](https://docs.astral.sh/ruff/rules/quoted-type-alias/#quoted-type-alias-tc008)
is a multiline string, the fix would introduce a syntax error. This PR
fixes that by adding parenthesis around the resulting replacement if the
string contained any newline characters (`\n`, `\r`) if it doesn't
already have parenthesis outside `("""...""")` or inside `"""(...)"""`
the annotation.
Failing examples:
https://play.ruff.rs/8793eb95-860a-4bb3-9cbc-6a042fee2946
```
PS D:\rust_projects\ruff> Get-Content issue.py
```
```py
from typing import TypeAlias
OptInt: TypeAlias = """int
| None"""
type OptInt = """int
| None"""
```
```
PS D:\rust_projects\ruff> uvx ruff check issue.py --isolated --select TC008 --fix --diff --preview
```
```
error: Fix introduced a syntax error. Reverting all changes.
This indicates a bug in Ruff. If you could open an issue at:
https://github.com/astral-sh/ruff/issues/new?title=%5BFix%20error%5D
...quoting the contents of `issue.py`, the rule codes TC008, along with the `pyproject.toml` settings and executed command, we'd be very appreciative!
```
This PR also makes the example error out-of-the-box for #18972
Old example: https://play.ruff.rs/f6cd5adb-7f9b-444d-bb3e-8c045241d93e
```py
OptInt: TypeAlias = "int | None"
```
New example: https://play.ruff.rs/906c1056-72c0-4777-b70b-2114eb9e6eaf
```py
from typing import TypeAlias
OptInt: TypeAlias = "int | None"
```
The import was also added to the "Use instead" section.
## Test Plan
<!-- How was it tested? -->
Added multiple test cases
## Summary
Per @ntBre in https://github.com/astral-sh/ruff/pull/19111, it would be
a good idea to make the tests no longer have these syntax errors, so
this PR updates the tests and snapshots.
`B031` gave me a lot of trouble since the ending test of declaring a
function named `groupby` makes it so that inside other functions, it's
unclear which `groupby` is referred to since it depends on when the
function is called. To fix it I made each function have it's own `from
itertools import groupby` so there's no more ambiguity.
Summary
--
Closes#19014 by identifying more `field` functions from `attrs`. We
already detected these when imported from `attrs` but not the `attr`
module from the same package. These functions are identical to the
`attrs` versions:
```pycon
>>> import attrs, attr
>>> attrs.field is attr.field
True
>>> attrs.Factory is attr.Factory
True
>>>
```
Test Plan
--
Regression tests based on the issue
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
This PR fixes#19047 / the [isinstance-type-none
(FURB168)](https://docs.astral.sh/ruff/rules/isinstance-type-none/#isinstance-type-none-furb168)
tuple false positive by adding a check if the tuple is empty to the
code. I also noticed there was another false positive with the other
tuple check in the same function, so I fixed it the same way.
`Union[()]` is invalid at runtime with `TypeError: Cannot take a Union
of no types.`, but it is accepted by `basedpyright`
[playground](https://basedpyright.com/?pythonVersion=3.8&typeCheckingMode=all&code=GYJw9gtgBALgngBwJYDsDmUkQWEMoCqKSYKAsAFAgCmAbtQIYA2A%2BvAtQBREkoDanAJQBdQUA)
and is equivalent to `Never`, so I fixed it anyways. I'm getting on a
side tangent here, but it looks like MyPy doesn't accept it, and ty
[playground](https://play.ty.dev/c2c468b6-38e4-4dd9-a9fa-0276e843e395)
gives `@Todo`.
## Test Plan
<!-- How was it tested? -->
Added two test cases for the two false positives.
[playground](https://play.ruff.rs/a53afc21-9a1d-4b9b-9346-abfbeabeb449)
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## Summary
Make `UP045` ignore `Optional[NamedTuple]` as `NamedTuple` is a function
(not a proper type). Rewriting it to `NamedTuple | None` breaks at
runtime. While type checkers currently accept `NamedTuple` as a type,
they arguably shouldn't. Therefore, we outright ignore it and don't
touch or lint on it.
For a more detailed discussion, see the linked issue.
## Test Plan
Added examples to the existing tests.
## Related Issues
Fixes: https://github.com/astral-sh/ruff/issues/18619
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## Summary
This PR fixes rule C420's fix. The fix replaces `{...}` with
`dict....(...)`. Therefore, if there is any identifier or such right
before the fix, the fix will fuse that previous token with `dict...`.
The example in the issue is
```python
0 or{x: None for x in "x"}
# gets "fixed" to
0 ordict.fromkeys(iterable)
```
## Related Issues
Fixes: https://github.com/astral-sh/ruff/issues/18599
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#18908
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## Summary
Mark `UP008`'s fix safe if it won't delete comments.
## Relevant Issues
Fixes: https://github.com/astral-sh/ruff/issues/18533
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
## Summary
Under preview 🧪 I've expanded rule `PYI016` to also flag type
union duplicates containing `None` and `Optional`.
## Test Plan
Examples/tests have been added. I've made sure that the existing
examples did not change unless preview is enabled.
## Relevant Issues
* https://github.com/astral-sh/ruff/issues/18508 (discussing
introducing/extending a rule to flag `Optional[None]`)
* https://github.com/astral-sh/ruff/issues/18546 (where I discussed this
addition with @AlexWaygood)
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
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## Summary
This PR also supresses the fix if the assignment expression target
shadows one of the lambda's parameters.
Fixes#18675
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Add regression tests.
<!-- How was it tested? -->
Summary
--
Closes#18849 by adding a `## Known issues` section describing the
potential performance issues when fixing nested iterables. I also
deleted the comment check since the fix is already unsafe and added a
note to the `## Fix safety` docs.
Test Plan
--
Existing tests, updated to allow a fix when comments are present since
the fix is already unsafe.
## Summary
This PR expands PGH005 to also check for AsyncMock methods in the same
vein. E.g., currently `assert mock.not_called` is linted. This PR adds
the corresponding async assertions `assert mock.not_awaited()`.
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
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## Summary
/closes #2331
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
update snapshots
<!-- How was it tested? -->
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
## Summary
Resolves#18165
Added pattern `["sys", "version_info", "major"]` to the existing matches
for `sys.version_info` to ensure consistent handling of both the base
object and its major version attribute.
## Test Plan
`cargo nextest run` and `cargo insta test`
---------
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
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## Summary
/closes #17424
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
<!-- How was it tested? -->
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## Summary
The fix would create a syntax error if there wasn't a space between the
`in` keyword and the following expression.
For example:
```python
for country, stars in(zip)(flag_stars.keys(), flag_stars.values()):...
```
I also noticed that the tests for `SIM911` were note being run, so I
fixed that.
Fixes#18776
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Add regression test
<!-- How was it tested? -->
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## Summary
This PR fixes `PLC2801` autofix creating a syntax error due to lack of
padding if it is directly after a keyword.
Fixes https://github.com/astral-sh/ruff/issues/18813
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Add regression test
<!-- How was it tested? -->
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## Summary
I've also found another bug while fixing this, where the diagnostic
would not trigger if the `len` call argument variable was shadowed. This
fixed a few false negatives in the test cases.
Example:
```python
fruits = []
fruits = []
if len(fruits): # comment
...
```
Fixes#18811Fixes#18812
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Add regression test
<!-- How was it tested? -->
---------
Co-authored-by: Charlie Marsh <crmarsh416@gmail.com>
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## Summary
Fix `PYI041`'s fix turning `None | int | None | float` into `None | None
| float`, which raises a `TypeError` when executed.
The fix consists of making sure that the merged super-type is inserted
where the first type that is merged was before.
## Test Plan
Tests have been expanded with examples from the issue.
## Related Issue
Fixes https://github.com/astral-sh/ruff/issues/18298
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## Summary
Fixes https://github.com/astral-sh/ruff/issues/18726 by also checking if
its a literal and not only that it is truthy. See also the first comment
in the issue.
It would have been nice to check for inheritance of BaseException but I
figured that is not possible yet...
## Test Plan
I added a few tests for valid input to exc_info
## Summary
Ignore `__init__.py` files in `useless-import-alias` (PLC0414).
See discussion in #18365 and #6294: we want to allow redundant aliases
in `__init__.py` files, as they're almost always intentional explicit
re-exports.
Closes#18365Closes#6294
---------
Co-authored-by: Dylan <dylwil3@gmail.com>
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## Summary
I also noticed that the tests for SIM911 were note being run, so I fixed
that.
Fixes#18777
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Add regression test
<!-- How was it tested? -->
## Summary
Fixes false positives (and incorrect autofixes) in `nested-min-max`
(`PLW3301`) when the outer `min`/`max` call only has a single argument.
Previously the rule would flatten:
```python
min(min([2, 3], [4, 1]))
```
into `min([2, 3], [4, 1])`, changing the semantics. The rule now skips
any nested call when the outer call has only one positional argument.
The pylint fixture and snapshot were updated accordingly.
## Test Plan
Ran Ruff against the updated `nested_min_max.py` fixture:
```shell
cargo run -p ruff -- check crates/ruff_linter/resources/test/fixtures/pylint/nested_min_max.py --no-cache --select=PLW3301 --preview
```
to verify that `min(min([2, 3], [4, 1]))` and `max(max([2, 4], [3, 1]))`
are no longer flagged. Updated the fixture and snapshot; all other
existing warnings remain unchanged. The code compiles and the unit tests
pass.
---
This PR was generated by an AI system in collaboration with maintainers:
@carljm, @ntBre
Fixes#16163
---------
Signed-off-by: Gene Parmesan Thomas <201852096+gopoto@users.noreply.github.com>
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
Added `cls.__dict__.get('__annotations__')` check for Python 3.10+ and
Python < 3.10 with `typing-extensions` enabled.
Closes#17853
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## Summary
Added `cls.__dict__.get('__annotations__')` check for Python 3.10+ and
Python < 3.10 with `typing-extensions` enabled.
## Test Plan
`cargo test`
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
Co-authored-by: Micha Reiser <micha@reiser.io>
Essentially this PR ensures that when we do fixes like this:
```diff
- t"{set(f(x) for x in foo)}"
+ t"{ {f(x) for x in foo} }"
```
we are correctly adding whitespace around the braces.
This logic is already in place for f-strings and just needed to be
generalized to interpolated strings.
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## Summary
Fixes#18684
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Add regression test
<!-- How was it tested? -->
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## Summary
/closes #18639
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
update snapshots
<!-- How was it tested? -->
---------
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
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This PR aims to close#16605.
## Summary
This PR introduces a new rule (`RUF061`) that detects non-contextmanager
usage of `pytest.raises`, `pytest.warns`, and `pytest.deprecated_call`.
This pattern is discouraged and [was proposed in
flake8-pytest-style](https://github.com/m-burst/flake8-pytest-style/pull/332),
but the corresponding PR has been open for over a month without
activity.
Additionally, this PR provides an unsafe fix for simple cases where the
non-contextmanager form can be transformed into the context manager
form. Examples of supported patterns are listed in `RUF061_raises.py`,
`RUF061_warns.py`, and `RUF061_deprecated_call.py` test files.
The more complex case from the original issue (involving two separate
statements):
```python
excinfo = pytest.raises(ValueError, int, "hello")
assert excinfo.match("^invalid literal")
```
is getting fixed like this:
```python
with pytest.raises(ValueError) as excinfo:
int("hello")
assert excinfo.match("^invalid literal")
```
Putting match in the raises call requires multi-statement
transformation, which I am not sure how to implement.
## Test Plan
<!-- How was it tested? -->
New test files were added to cover various usages of the
non-contextmanager form of pytest.raises, warns, and deprecated_call.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Solves #18257
## Test Plan
<!-- How was it tested? -->
Snapshots updated with some cases (negative, positive, mixed
annotations).
## Summary
Fixes https://github.com/astral-sh/ruff/issues/18628 by avoiding a fix
if there are "unknown" arguments, including any keyword arguments and
more than the expected 2 positional arguments.
I'm a bit on the fence here because it also seems reasonable to avoid a
diagnostic at all. Especially in the final test case I added (`not
my_dict.get(default=False)`), the hint suggesting to remove
`default=False` seems pretty misleading. At the same time, I guess the
diagnostic at least calls attention to the call site, which could help
to fix the missing argument bug too.
As I commented on the issue, I double-checked that keyword arguments are
invalid as far back as Python 3.8, even though the positional-only
marker was only added to the
[docs](https://docs.python.org/3.11/library/stdtypes.html#dict.get) in
3.12 (link is to 3.11, showing its absence).
## Test Plan
New tests derived from the bug report
## Stabilization
This was planned to be stabilized in 0.12, and the bug is less severe
than some others, but if there's nobody opposed, I will plan **not to
stabilize** this one for now.
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## Summary
Fixes false positive in B909 (`loop-iterator-mutation`) where mutations
inside return/break statements were incorrectly flagged as violations.
The fix adds tracking for when mutations occur within return/break
statements and excludes them from violation detection, as they don't
cause the iteration issues B909 is designed to prevent.
## Test Plan
- Added test cases covering the reported false positive scenarios to
`B909.py`
- Verified existing B909 tests continue to pass (no regressions)
- Ran `cargo test -p ruff_linter --lib flake8_bugbear` successfully
Fixes#18399
## Summary
Fixes https://github.com/astral-sh/ruff/issues/18612 by:
- Bailing out without a fix in the case of `*args`, which I don't think
we can fix reliably
- Using an `Edit::deletion` from `remove_argument` instead of an
`Edit::range_replacement` in the presence of unrecognized keyword
arguments
I thought we could always switch to the `Edit::deletion` approach
initially, but it caused problems when `maxlen` was passed positionally,
which we didn't have any existing tests for.
The replacement fix can easily delete comments, so I also marked the fix
unsafe in these cases and updated the docs accordingly.
## Test Plan
New test cases derived from the issue.
## Stabilization
These are pretty significant changes, much like those to PYI059 in
https://github.com/astral-sh/ruff/pull/18611 (and based a bit on the
implementation there!), so I think it probably makes sense to
un-stabilize this for the 0.12 release, but I'm open to other thoughts
there.
## Summary
Fixes https://github.com/astral-sh/ruff/issues/18602 by:
1. Avoiding a fix when `*args` are present
2. Inserting the `Generic` base class right before the first keyword
argument, if one is present
In an intermediate commit, I also had special handling to avoid a fix in
the `**kwargs` case, but this is treated (roughly) as a normal keyword,
and I believe handling it properly falls out of the other keyword fix.
I also updated the `add_argument` utility function to insert new
arguments right before the keyword argument list instead of at the very
end of the argument list. This changed a couple of snapshots unrelated
to `PYI059`, but there shouldn't be any functional changes to other
rules because all other calls to `add_argument` were adding a keyword
argument anyway.
## Test Plan
Existing PYI059 cases, plus new tests based on the issue
---------
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Summary
--
Fixes#18590 by adding parentheses around lambdas and if expressions in
`for` loop iterators for FURB122 and FURB142. I also updated the docs on
the helper function to reflect the part actually being parenthesized and
the new checks.
The `lambda` case actually causes a `TypeError` at runtime, but I think
it's still worth handling to avoid causing a syntax error.
```pycon
>>> s = set()
... for x in (1,) if True else (2,):
... s.add(-x)
... for x in lambda: 0:
... s.discard(-x)
...
Traceback (most recent call last):
File "<python-input-0>", line 4, in <module>
for x in lambda: 0:
^^^^^^^^^
TypeError: 'function' object is not iterable
```
Test Plan
--
New test cases based on the bug report
---------
Co-authored-by: Dylan <dylwil3@gmail.com>
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## Summary
Closes#17226.
This PR updates the `FAST003` rule to correctly handle [FastAPI class
dependencies](https://fastapi.tiangolo.com/tutorial/dependencies/classes-as-dependencies/).
Specifically, if a path parameter is declared in either:
- a `pydantic.BaseModel` used as a dependency, or
- the `__init__` method of a class used as a dependency,
then `FAST003` will no longer incorrectly report it as unused.
FastAPI allows a shortcut when using annotated class dependencies -
`Depends` can be called without arguments, e.g.:
```python
class MyParams(BaseModel):
my_id: int
@router.get("/{my_id}")
def get_id(params: Annotated[MyParams, Depends()]): ...
```
This PR ensures that such usage is properly supported by the linter.
Note: Support for dataclasses is not included in this PR. Let me know if
you’d like it to be added.
## Test Plan
Added relevant test cases to the `FAST003.py` fixture.
This PR implements template strings (t-strings) in the parser and
formatter for Ruff.
Minimal changes necessary to compile were made in other parts of the code (e.g. ty, the linter, etc.). These will be covered properly in follow-up PRs.
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## Summary
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Follow up on https://github.com/astral-sh/ruff/pull/18093 and apply it
to AIR312
## Test Plan
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The existing test fixtures have been updated
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## Summary
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Follow up on https://github.com/astral-sh/ruff/pull/18093 and apply it
to AIR311
---
Rules fixed
* `airflow.models.datasets.expand_alias_to_datasets` →
`airflow.models.asset.expand_alias_to_assets`
* `airflow.models.baseoperatorlink.BaseOperatorLink` →
`airflow.sdk.BaseOperatorLink`
## Test Plan
<!-- How was it tested? -->
The existing test fixtures have been updated
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Follow up on https://github.com/astral-sh/ruff/pull/18093 and apply it
to AIR301
## Test Plan
<!-- How was it tested? -->
The existing test fixtures have been updated
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## Summary
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Add utility functions `generate_import_edit` and
`generate_remove_and_runtime_import_edit` to generate the fix needed for
the airflow rules.
1. `generate_import_edit` is for the cases where the member name has
changed. (e.g., `airflow.datasts.Dataset` to `airflow.sdk.Asset`) It's
just extracted from the original logic
2. `generate_remove_and_runtime_import_edit` is for cases where the
member name has not changed. (e.g.,
`airflow.operators.pig_operator.PigOperator` to
`airflow.providers.apache.pig.hooks.pig.PigCliHook`) This is newly
introduced. As it introduced runtime import, I mark it as an unsafe fix.
Under the hook, it tried to find the original import statement, remove
it, and add a new import fix
---
* rules fix
* `airflow.sensors.external_task_sensor.ExternalTaskSensorLink` →
`airflow.providers.standard.sensors.external_task.ExternalDagLink`
## Test Plan
<!-- How was it tested? -->
The existing test fixtures have been updated
## Summary
Adds coverage of using set(...) in addition to `{...} in
SingleItemMembershipTest.
Fixes#15792
(and replaces the old PR #15793)
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Updated unit test and snapshot.
Steps to reproduce are in the issue linked above.
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## Summary
Fixes#18231
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Snapshot tests
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## Summary
Implements `use-maxsplit-arg` (`PLC0207`)
https://pylint.readthedocs.io/en/latest/user_guide/messages/convention/use-maxsplit-arg.html
> Emitted when accessing only the first or last element of str.split().
The first and last element can be accessed by using str.split(sep,
maxsplit=1)[0] or str.rsplit(sep, maxsplit=1)[-1] instead.
This is part of https://github.com/astral-sh/ruff/issues/970
## Test Plan
`cargo test`
Additionally compared Ruff output to Pylint:
```
pylint --disable=all --enable=use-maxsplit-arg crates/ruff_linter/resources/test/fixtures/pylint/missing_maxsplit_arg.py
cargo run -p ruff -- check crates/ruff_linter/resources/test/fixtures/pylint/missing_maxsplit_arg.py --no-cache --select PLC0207
```
---------
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
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## Summary
Fixes#18353
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
<!-- How was it tested? -->
Snapshot tests
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## Summary
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* Remove the following rules
* name
* `airflow.auth.managers.base_auth_manager.is_authorized_dataset` →
`airflow.api_fastapi.auth.managers.base_auth_manager.is_authorized_asset`
*
`airflow.providers.fab.auth_manager.fab_auth_manager.is_authorized_dataset`
→
`airflow.providers.fab.auth_manager.fab_auth_manager.is_authorized_asset`
* Update the following rules
* name
* `airflow.models.baseoperatorlink.BaseOperatorLink` →
`airflow.sdk.BaseOperatorLink`
* `airflow.api_connexion.security.requires_access` → "Use
`airflow.api_fastapi.core_api.security.requires_access_*` instead`"
* `airflow.api_connexion.security.requires_access_dataset`→
`airflow.api_fastapi.core_api.security.requires_access_asset`
* `airflow.notifications.basenotifier.BaseNotifier` →
`airflow.sdk.bases.notifier.BaseNotifier`
* `airflow.www.auth.has_access` → None
* `airflow.www.auth.has_access_dataset` → None
* `airflow.www.utils.get_sensitive_variables_fields`→ None
* `airflow.www.utils.should_hide_value_for_key`→ None
* class attribute
* `airflow..sensors.weekday.DayOfWeekSensor`
* `use_task_execution_day` removed
*
`airflow.providers.amazon.aws.auth_manager.aws_auth_manager.AwsAuthManager`
* `is_authorized_dataset`
* Add the following rules
* class attribute
* `airflow.auth.managers.base_auth_manager.BaseAuthManager` |
`airflow.providers.fab.auth_manager.fab_auth_manager.FabAuthManager`
* name
* `airflow.auth.managers.base_auth_manager.BaseAuthManager` →
`airflow.api_fastapi.auth.managers.base_auth_manager.BaseAuthManager` *
`is_authorized_dataset` → `is_authorized_asset`
* refactor
* simplify unnecessary match with if else
* rename Replacement::Name as Replacement::AttrName
## Test Plan
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The test fixtures have been revised and updated.
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## Summary
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In the later development of Airflow 3.0, backward compatibility was not
added for some cases. Thus, the following rules are moved back to AIR302
* airflow.hooks.subprocess.SubprocessResult →
airflow.providers.standard.hooks.subprocess.SubprocessResult
* airflow.hooks.subprocess.working_directory →
airflow.providers.standard.hooks.subprocess.working_directory
* airflow.operators.datetime.target_times_as_dates →
airflow.providers.standard.operators.datetime.target_times_as_dates
* airflow.operators.trigger_dagrun.TriggerDagRunLink →
airflow.providers.standard.operators.trigger_dagrun.TriggerDagRunLink
* airflow.sensors.external_task.ExternalTaskSensorLink →
airflow.providers.standard.sensors.external_task.ExternalDagLink (**This
one contains a minor change**)
* airflow.sensors.time_delta.WaitSensor →
airflow.providers.standard.sensors.time_delta.WaitSensor
## Test Plan
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## Summary
Fixes#18107
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
Snapshot tests
<!-- How was it tested? -->
Fixes#18069
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## Summary
This PR addresses a bug in the `flake8-simplify` rule `SIM905`
(split-static-string) where `str.split(maxsplit=0)` and
`str.rsplit(maxsplit=0)` produced incorrect results for empty strings or
strings starting/ending with whitespace. The fix ensures that the
linting rule's suggested replacements now align with Python's native
behavior for these specific `maxsplit=0` scenarios.
## Test Plan
1. Added new test cases to the existing
`crates/ruff_linter/resources/test/fixtures/flake8_simplify/SIM905.py`
fixture to cover the scenarios described in issue #18069.
2. Ran `cargo test -p ruff_linter`.
3. Verified and accepted the updated snapshots for `SIM905.py` using
`cargo insta review`. The new snapshots confirm the corrected behavior
for `maxsplit=0`.
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## Summary
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Similiar to https://github.com/astral-sh/ruff/pull/17941.
`Replacement::Name` was designed for linting only. Now, we also want to
fix the user code. It would be easier to replace it with a better
AutoImport struct whenever possible.
On the other hand, `AIR301` and `AIR311` contain attribute changes that
can still use a struct like `Replacement::Name`. To reduce the
confusion, I also updated it as `Replacement::AttrName`
Some of the original `Replacement::Name` has been replaced as
`Replacement::Message` as they're not directly mapping and the message
has now been moved to `help`
## Test Plan
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The test fixtures have been updated
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## Summary
Fixes#17599.
## Test Plan
Snapshot tests.
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
Dan Parizher
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