## Summary
This PR updates the lexer tests to use the snapshot testing framework.
It also
makes the following changes:
* Remove the use of macros in the lexer tests
* Use `test_case` for EOL tests
## Test Plan
```
cargo test --package ruff_python_parser --lib --all-features -- lexer::tests --no-capture
```
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## Summary
This PR adds a utility for transforming expressions via LibCST that
automatically wraps the expression in parentheses, applies a
user-provided transformation, then strips the parentheses from the
generated code. LibCST can't parse arbitrary expression ranges, since
some expressions may require parenthesization in order to be parsed
properly. For example:
```python
option = (
'{name}={value}'
.format(nam=name, value=value)
)
```
In this case, the expression range is:
```python
'{name}={value}'
.format(nam=name, value=value)
```
Which isn't valid on its own. So, instead, we add "fake" parentheses
around the expression.
We were already doing this in a few places, so this is mostly
formalizing and DRYing up that pattern.
Closes https://github.com/astral-sh/ruff/issues/6720.
## Summary
For imports, we enforce that there's _at least_ one empty line after an
import (assuming the next statement is _not_ an import), but allow up to
two at the module level.
Closes https://github.com/astral-sh/ruff/issues/6760.
## Test Plan
`cargo test`
## Summary
The isolation group for unused imports was relying on
`checker.semantic().current_statement()`, which isn't valid for that
rule, since it runs over the _scope_, not the statement. Instead, we
need to lookup the isolation group based on the `NodeId` of the
statement.
Our tests didn't catch this, because we mostly have cases that look like
this:
```python
if TYPE_CHECKING:
import shelve
import importlib
```
In this case, the two fixes to remove the two unused imports are
considered overlapping (since we delete the _full_ line, and the two
_full_ lines touch, and we consider exactly-adjacent fixes to be
overlapping), and so they don't run in a single pass due to the
non-overlapping-fixes requirement. That is: the isolation groups aren't
required for this case. They are, however, required for cases like:
```python
if TYPE_CHECKING:
import shelve
import importlib
```
...where the fixes don't overlap.
Closes https://github.com/astral-sh/ruff/issues/6758.
## Test Plan
`cargo test`
`IOError` is special, it is not actually a lint but an error before
linting. I'm not entirely sure how to document it since it does not
match the general lint rule pattern (`Checks that the file can be read
in its entirety.` is imho worse).
I added the in my experience two most common reasons for io errors on
unix systems and linked two tutorials on how to fix them.
See https://github.com/astral-sh/ruff/issues/2646
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
## Summary
I noticed this in the ecosystem CI check from
https://github.com/astral-sh/ruff/pull/6742. If we include source code
directly in a diagnostic, we need to be careful to avoid rendering
multi-line diagnostics or even excessively long diagnostics.
## Test Plan
`cargo test`
## Summary
This PR is a follow-up to the suggestion in
https://github.com/astral-sh/ruff/pull/6345#discussion_r1285470953 to
use a single stack to store all statements and expressions, rather than
using separate vectors for each, which gives us something closer to a
full-fidelity chain. (We can then generalize this concept to include all
other AST nodes too.)
This is in part made possible by the removal of the hash map from
`&Stmt` to `StatementId` (#6694), which makes it much cheaper to store
these using a single interface (since doing so no longer introduces the
requirement that we hash all expressions).
I'll follow-up with some profiling, but a few notes on how the data
requirements have changed:
- We now store a `BranchId` for every expression, not just every
statement, so that's an extra `u32`.
- We now store a single `NodeId` on every snapshot, rather than separate
`StatementId` and `ExpressionId` IDs, so that's one fewer `u32` for each
snapshot.
- We're probably doing a few more lookups in general, since any calls to
`current_statement()` etc. now have to iterate up the node hierarchy
until they identify the first statement.
## Test Plan
`cargo test`
## Summary
Avoid attempting to rewrite `import matplotlib.pyplot` as `import
matplotlib.pyplot as plt`. We can't support these right now, since we
don't track references at the attribute level (like
`matplotlib.pyplot`).
Closes https://github.com/astral-sh/ruff/issues/6719.
## Summary
Given:
```python
from sys import *
exit(0)
```
We can't add `exit` to `from sys import *`, so we should just ignore it.
Ideally, we'd just resolve `exit` in the first place (since it's
imported from `from sys import *`), but as long as we don't support
wildcard imports, this is more consistent.
Closes https://github.com/astral-sh/ruff/issues/6718.
## Test Plan
`cargo test`
Avoid the nesting in a macro by using the new `WithNodeLevel` to
`PyFormatter` deref. No changes otherwise.
I wanted to follow this up with quickly fixing the typeshed empty line
rules but they turned out a lot more complex than i had anticipated.
**Summary** A common pattern in the code used to be
```rust
if statements.len() != 1 {
return;
}
use_single_entry(statements[0])?;
```
which can be better expressed as
```rust
let [statement] = statements else {
return;
};
use_single_entry(statements)?;
```
Direct indexing can cause panics if you don't manually take care of
checking the length, while matching (such as if-let or let-else) can
never panic.
This isn't a complete refactor, i've just removed some of the obvious
cases. I've specifically looked for `.len() != 1` and fixed those.
**Test Plan** No functional changes
## Summary
We're using LibCST to ensure that we return the full parenthesized range
of an expression, for display purposes. We can just use
`parenthesized_range` which is more efficient and removes one LibCST
dependency.
## Test Plan
`cargo test`
This _probably_ never matters given the set of rules we support and in
fact I'm having trouble thinking of a test-case for it, but it's
definitely incorrect _not_ to pass on the `BranchId` here.
## Summary
We have a few rules that rely on detecting whether two statements are in
different branches -- for example, different arms of an `if`-`else`.
Historically, the way this was implemented is that, given two statement
IDs, we'd find the common parent (by traversing upwards via our
`Statements` abstraction); then identify branches "manually" by matching
the parents against `try`, `if`, and `match`, and returning iterators
over the arms; then check if there's an arm for which one of the
statements is a child, and the other is not.
This has a few drawbacks:
1. First, the code is generally a bit hard to follow (Konsti mentioned
this too when working on the `ElifElseClause` refactor).
2. Second, this is the only place in the codebase where we need to go
from `&Stmt` to `StatementID` -- _everywhere_ else, we only need to go
in the _other_ direction. Supporting these lookups means we need to
maintain a mapping from `&Stmt` to `StatementID` that includes every
`&Stmt` in the program. (We _also_ end up maintaining a `depth` level
for every statement.) I'd like to get rid of these requirements to
improve efficiency, reduce complexity, and enable us to treat AST modes
more generically in the future. (When I looked at adding the `&Expr` to
our existing statement-tracking infrastructure, maintaining a hash map
with all the statements noticeably hurt performance.)
The solution implemented here instead makes branches a first-class
concept in the semantic model. Like with `Statements`, we now have a
`Branches` abstraction, where each branch points to its optional parent.
When we store statements, we store the `BranchID` alongside each
statement. When we need to detect whether two statements are in the same
branch, we just realize each statement's branch path and compare the
two. (Assuming that the two statements are in the same scope, then
they're on the same branch IFF one branch path is a subset of the other,
starting from the top.) We then add some calls to the visitor to push
and pop branches in the appropriate places, for `if`, `try`, and `match`
statements.
Note that a branch is not 1:1 with a statement; instead, each branch is
closer to a suite, but not _every_ suite is a branch. For example, each
arm in an `if`-`elif`-`else` is a branch, but the `else` in a `for` loop
is not considered a branch.
In addition to being much simpler, this should also be more efficient,
since we've shed the entire `&Stmt` hash map, plus the `depth` that we
track on `StatementWithParent` in favor of a single `Option<BranchID>`
on `StatementWithParent` plus a single vector for all branches. The
lookups should be faster too, since instead of doing a bunch of jumps
around with the hash map + repeated recursive calls to find the common
parents, we instead just do a few simple lookups in the `Branches`
vector to realize and compare the branch paths.
## Test Plan
`cargo test` -- we have a lot of coverage for this, which we inherited
from PyFlakes
## Summary
This is much simpler and avoids (1) multiple passes over the entire
function body, (2) requiring the rule to do its own binding tracking (we
can just use the semantic model), and (3) a usage of `StatementKey`.
In general, where we can, we should try to remove these kinds of custom
visitors that track name references, and instead rely on the semantic
model.
## Test Plan
`cargo test`
## Summary
If a lambda doesn't contain any parameters, or any parameter _tokens_
(like `*`), we can use `None` for the parameters. This feels like a
better representation to me, since, e.g., what should the `TextRange` be
for a non-existent set of parameters? It also allows us to remove
several sites where we check if the `Parameters` is empty by seeing if
it contains any arguments, so semantically, we're already trying to
detect and model around this elsewhere.
Changing this also fixes a number of issues with dangling comments in
parameter-less lambdas, since those comments are now automatically
marked as dangling on the lambda. (As-is, we were also doing something
not-great whereby the lambda was responsible for formatting dangling
comments on the parameters, which has been removed.)
Closes https://github.com/astral-sh/ruff/issues/6646.
Closes https://github.com/astral-sh/ruff/issues/6647.
## Test Plan
`cargo test`
## Summary
In working on https://github.com/astral-sh/ruff/pull/6628, I noticed
that we clone the source code contents, potentially multiple times,
prior to linting. The issue is that `SourceKind::Python` takes a
`String`, so we first have to provide it with a `String`. In the stdin
case, that means cloning. However, on top of this, we then have to clone
`source_kind.contents()` because `SourceKind` gets mutated. So for
stdin, we end up cloning twice. For non-stdin, we end up cloning once,
but unnecessarily (since the _contents_ don't get mutated, only the
kind).
This PR removes the `String` from `source_kind`, instead requiring that
we parse it out elsewhere. It reduces the number of clones down to 1 for
Jupyter Notebooks, and zero otherwise.
## Summary
The motivating code here was:
```python
with test as (
# test
foo):
pass
```
Which we were formatting as:
```python
with test as
# test
(foo):
pass
```
`with` statements are oddly difficult. This PR makes a bunch of subtle
modifications and adds a more extensive test suite. For example, we now
only preserve parentheses if there's more than one `WithItem` _or_ a
trailing comma; before, we always preserved.
Our formatting is_not_ the same as Black, but here's a diff of our
formatted code vs. Black's for the `with.py` test suite. The primary
difference is that we tend to break parentheses when they contain
comments rather than move them to the end of the life (this is a
consistent difference that we make across the codebase):
```diff
diff --git a/crates/ruff_python_formatter/foo.py b/crates/ruff_python_formatter/foo.py
index 85e761080..31625c876 100644
--- a/crates/ruff_python_formatter/foo.py
+++ b/crates/ruff_python_formatter/foo.py
@@ -1,6 +1,4 @@
-with (
- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-), aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:
+with aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:
...
# trailing
@@ -16,28 +14,33 @@ with (
# trailing
-with a, b: # a # comma # c # colon
+with (
+ a, # a # comma
+ b, # c
+): # colon
...
with (
- a as # a # as
- # own line
- b, # b # comma
+ a as ( # a # as
+ # own line
+ b
+ ), # b # comma
c, # c
): # colon
... # body
# body trailing own
-with (
- a as # a # as
+with a as ( # a # as
# own line
- bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb # b
-):
+ bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+): # b
pass
-with (a,): # magic trailing comma
+with (
+ a,
+): # magic trailing comma
...
@@ -47,6 +50,7 @@ with a: # should remove brackets
with aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as c:
...
+
with (
# leading comment
a
@@ -74,8 +78,7 @@ with (
with (
a # trailing same line comment
# trailing own line comment
- as b
-):
+) as b:
...
with (
@@ -87,7 +90,9 @@ with (
with (
a
# trailing own line comment
-) as b: # trailing as same line comment # trailing b same line comment
+) as ( # trailing as same line comment
+ b
+): # trailing b same line comment
...
with (
@@ -124,18 +129,24 @@ with ( # comment
...
with ( # outer comment
- CtxManager1() as example1, # inner comment
+ ( # inner comment
+ CtxManager1()
+ ) as example1,
CtxManager2() as example2,
CtxManager3() as example3,
):
...
-with CtxManager() as example: # outer comment
+with ( # outer comment
+ CtxManager()
+) as example:
...
with ( # outer comment
CtxManager()
-) as example, CtxManager2() as example2: # inner comment
+) as example, ( # inner comment
+ CtxManager2()
+) as example2:
...
with ( # outer comment
@@ -145,7 +156,9 @@ with ( # outer comment
...
with ( # outer comment
- (CtxManager1()), # inner comment
+ ( # inner comment
+ CtxManager1()
+ ),
CtxManager2(),
) as example:
...
@@ -179,7 +192,9 @@ with (
):
pass
-with a as (b): # foo
+with a as ( # foo
+ b
+):
pass
with f(
@@ -209,17 +224,13 @@ with f(
) as b, c as d:
pass
-with (
- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
-) as b:
+with aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as b:
pass
with aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as b:
pass
-with (
- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
-) as b, c as d:
+with aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as b, c as d:
pass
with (
@@ -230,6 +241,8 @@ with (
pass
with (
- aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
-) as b, c as d:
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+ + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as b,
+ c as d,
+):
pass
```
Closes https://github.com/astral-sh/ruff/issues/6600.
## Test Plan
Before:
| project | similarity index |
|--------------|------------------|
| cpython | 0.75473 |
| django | 0.99804 |
| transformers | 0.99618 |
| twine | 0.99876 |
| typeshed | 0.74292 |
| warehouse | 0.99601 |
| zulip | 0.99727 |
After:
| project | similarity index |
|--------------|------------------|
| cpython | 0.75473 |
| django | 0.99804 |
| transformers | 0.99618 |
| twine | 0.99876 |
| typeshed | 0.74292 |
| warehouse | 0.99601 |
| zulip | 0.99727 |
`cargo test`
## Summary
Attaches comments around the `:=` operator in a named expression as
dangling, and formats them manually in the `named_expr.rs` formatter.
Closes https://github.com/astral-sh/ruff/issues/5695.
## Test Plan
`cargo test`
## Summary
This PR exposes our `is_expression_parenthesized` logic such that we can
use it to expand expressions when autofixing to include their
parenthesized ranges.
This solution has a few drawbacks: (1) we need to compute parenthesized
ranges in more places, which also relies on backwards lexing; and (2) we
need to make use of this in any relevant fixes.
However, I still think it's worth pursuing. On (1), the implementation
is very contained, so IMO we can easily swap this out for a more
performant solution in the future if needed. On (2), this improves
correctness and fixes some bad syntax errors detected by fuzzing, which
means it has value even if it's not as robust as an _actual_
`ParenthesizedExpression` node in the AST itself.
Closes https://github.com/astral-sh/ruff/issues/4925.
## Test Plan
`cargo test` with new cases that previously failed the fuzzer.
## Summary
I noticed some inconsistencies around uses of `.range.start()`, structs
that have a `TextRange` field but don't implement `Ranged`, etc.
## Test Plan
`cargo test`
## Summary
Given:
```python
if (
x
:=
( # 4
y # 5
) # 6
):
pass
```
It turns out the parser ended the range of the `NamedExpr` at the end of
`y`, rather than the end of the parenthesis that encloses `y`. This just
seems like a bug -- the range should be from the start of the name on
the left, to the end of the parenthesized node on the right.
## Test Plan
`cargo test`
Closes https://github.com/astral-sh/ruff/issues/6442
Python string formatting like `"hello {place}".format(place="world")`
supports format specifications for replaced content such as `"hello
{place:>10}".format(place="world")` which will align the text to the
right in a container filled up to ten characters.
Ruff parses formatted strings into `FormatPart`s each of which is either
a `Field` (content in `{...}`) or a `Literal` (the normal content).
Fields are parsed into name and format specifier sections (we'll ignore
conversion specifiers for now).
There are a myriad of specifiers that can be used in a `FormatSpec`.
Unfortunately for linters, the specifier values can be dynamically set.
For example, `"hello {place:{align}{width}}".format(place="world",
align=">", width=10)` and `"hello {place:{fmt}}".format(place="world",
fmt=">10")` will yield the same string as before but variables can be
used to determine the formatting. In this case, when parsing the format
specifier we can't know what _kind_ of specifier is being used as their
meaning is determined by both position and value.
Ruff does not support nested replacements and our current data model
does not support the concept. Here the data model is updated to support
this concept, although linting of specifications with replacements will
be inherently limited. We could split format specifications into two
types, one without any replacements that we can perform lints with and
one with replacements that we cannot inspect. However, it seems
excessive to drop all parsing of format specifiers due to the presence
of a replacement. Instead, I've opted to parse replacements eagerly and
ignore their possible effect on other format specifiers. This will allow
us to retain a simple interface for `FormatSpec` and most syntax checks.
We may need to add some handling to relax errors if a replacement was
seen previously.
It's worth noting that the nested replacement _can_ also include a
format specification although it may fail at runtime if you produce an
invalid outer format specification. For example, `"hello
{place:{fmt:<2}}".format(place="world", fmt=">10")` is valid so we need
to represent each nested replacement as a full `FormatPart`.
## Test plan
Adding unit tests for `FormatSpec` parsing and snapshots for PLE1300
## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Support glob patterns for `raises_require_match_for` and
`raises_require_match_for`. Resolve#6473
## Test Plan
New tests + existing tests
## Summary
No behavior changes, but these need some refactoring to support
https://github.com/astral-sh/ruff/pull/6575 (namely, they need to take
the `ast::ExprCompare` or similar node instead of the attribute fields),
and I don't want to muddy that PR.
## Test Plan
`cargo test`
## Summary
Ensures we avoid cases like:
```python
x.values = 1
```
Since Pandas doesn't even expose a setter for that. We also avoid cases
like:
```python
print(self.values)
```
Since it's overwhelming likely to be a false positive.
Closes https://github.com/astral-sh/ruff/issues/6630.
## Test Plan
`cargo test`
## Summary
When running Ruff from stdin, we were always falling back to the default
source type, even if the user specified a path (as is the case when
running from the LSP). This PR wires up the source type inference, which
means we now get the expected result when checking `.pyi` and `.ipynb`
files.
Closes#6627.
## Test Plan
Verified that `cat
crates/ruff/resources/test/fixtures/jupyter/valid.ipynb | cargo run -p
ruff_cli -- --force-exclude --no-cache --no-fix --isolated --select ALL
--stdin-filename foo.ipynb -` yielded the expected results (and differs
from the errors you get if you omit the filename).
Verified that `cat foo.pyi | cargo run -p ruff_cli -- --force-exclude
--no-cache --no-fix --format json --isolated --select TCH
--stdin-filename path/to/foo.pyi -` yielded no errors.
In https://github.com/astral-sh/ruff/pull/6616 we are adding support for
nested replacements in format specifiers which makes actually formatting
strings infeasible without a great deal of complexity. Since we're not
using these functions (they just exist for runtime use in RustPython),
we can just remove them.
## Summary
Closes https://github.com/astral-sh/ruff/issues/6384, although I think
the issue was fixed already on main, for the most part.
The linked issue is around formatting expressions like:
```python
def test():
(
yield
#comment 1
* # comment 2
# comment 3
test # comment 4
)
```
On main, prior to this PR, we now format like:
```python
def test():
(
yield (
# comment 1
# comment 2
# comment 3
*test
) # comment 4
)
```
Which strikes me as reasonable. (We can't test this, since it's a syntax
error after for our parser, despite being a syntax error in both cases
from CPython's perspective.)
Meanwhile, Black does:
```python
def test():
(
yield
# comment 1
* # comment 2
# comment 3
test # comment 4
)
```
So our formatting differs in that we move comments between the star and
the expression above the star.
As of this PR, we also support formatting this input, which is valid:
```python
def test():
(
yield
#comment 1
* # comment 2
# comment 3
test, # comment 4
1
)
```
Like:
```python
def test():
(
yield (
# comment 1
(
# comment 2
# comment 3
*test, # comment 4
1,
)
)
)
```
There were two fixes here: (1) marking starred comments as dangling and
formatting them properly; and (2) supporting parenthesized comments for
tuples that don't contain their own parentheses, as is often the case
for yielded tuples (previously, we hit a debug assert).
Note that this diff
## Test Plan
cargo test
## Summary
Allows for proper lexing of tokens like `->`.
The main challenge is to ensure that our forward and backwards
representations are the same for cases like `===`. Specifically, we want
that to lex as `==` followed by `=` regardless of whether it's a
forwards or backwards lex. To do so, we identify the range of the
sequential characters (the full span of `===`), lex it forwards, then
return the last token.
## Test Plan
`cargo test`
## Summary
This PR adds support for parenthesized comments. A parenthesized comment
is a comment that appears within a parenthesis, but not within the range
of the expression enclosed by the parenthesis. For example, the comment
here is a parenthesized comment:
```python
if (
# comment
True
):
...
```
The parentheses enclose the `True`, but the range of `True` doesn’t
include the `# comment`.
There are at least two problems associated with parenthesized comments:
(1) associating the comment with the correct (i.e., enclosed) node; and
(2) formatting the comment correctly, once it has been associated with
the enclosed node.
The solution proposed here for (1) is to search for parentheses between
preceding and following node, and use open and close parentheses to
break ties, rather than always assigning to the preceding node.
For (2), we handle these special parenthesized comments in `FormatExpr`.
The biggest risk with this approach is that we forget some codepath that
force-disables parenthesization (by passing in `Parentheses::Never`).
I've audited all usages of that enum and added additional handling +
test coverage for such cases.
Closes https://github.com/astral-sh/ruff/issues/6390.
## Test Plan
`cargo test` with new cases.
Before:
| project | similarity index |
|--------------|------------------|
| build | 0.75623 |
| cpython | 0.75472 |
| django | 0.99804 |
| transformers | 0.99618 |
| typeshed | 0.74233 |
| warehouse | 0.99601 |
| zulip | 0.99727 |
After:
| project | similarity index |
|--------------|------------------|
| build | 0.75623 |
| cpython | 0.75472 |
| django | 0.99804 |
| transformers | 0.99618 |
| typeshed | 0.74237 |
| warehouse | 0.99601 |
| zulip | 0.99727 |
## Summary
Unlike other statements, Black always adds a trailing comma if an
import-from statement breaks with a single import member. I believe this
is for compatibility with isort -- see
09f5ee3a19,
https://github.com/psf/black/issues/127, or
66648c528a/src/black/linegen.py (L1452)
for the current version.
## Test Plan
`cargo test`, notice that a big chunk of the compatibility suite is
removed.
Before:
| project | similarity index |
|--------------|------------------|
| cpython | 0.75472 |
| django | 0.99804 |
| transformers | 0.99618 |
| twine | 0.99876 |
| typeshed | 0.74233 |
| warehouse | 0.99601 |
| zulip | 0.99727 |
After:
| project | similarity index |
|--------------|------------------|
| cpython | 0.75472 |
| django | 0.99804 |
| transformers | 0.99618 |
| twine | 0.99876 |
| typeshed | 0.74260 |
| warehouse | 0.99601 |
| zulip | 0.99727 |
## Summary
Instead, we set an `is_star` flag on `Stmt::Try`. This is similar to the
pattern we've migrated towards for `Stmt::For` (removing
`Stmt::AsyncFor`) and friends. While these are significant differences
for an interpreter, we tend to handle these cases identically or nearly
identically.
## Test Plan
`cargo test`
## Summary
This PR adds handling for comments on open parentheses in parenthesized
context managers. For example, given:
```python
with ( # comment
CtxManager1() as example1,
CtxManager2() as example2,
CtxManager3() as example3,
):
...
```
We want to preserve that formatting. (Black does the same.) On `main`,
we format as:
```python
with (
# comment
CtxManager1() as example1,
CtxManager2() as example2,
CtxManager3() as example3,
):
...
```
It's very similar to how `StmtImportFrom` is handled.
Note that this case _isn't_ covered by the "parenthesized comment"
proposal, since this is a common on the statement that would typically
be attached to the first `WithItem`, and the `WithItem` _itself_ can
have parenthesized comments, like:
```python
with ( # comment
(
CtxManager1() # comment
) as example1,
CtxManager2() as example2,
CtxManager3() as example3,
):
...
```
## Test Plan
`cargo test`
Confirmed no change in similarity score.
## Summary
For #6485, I need to be able to use the `SimpleTokenizer` to lex the
space between any two adjacent expressions (i.e., the space between a
preceding and following node). This requires that we support a wider
range of keywords (like `and`, to connect the pieces of `x and y`), and
some additional single-character tokens (like `-` and `>`, to support
`->`). Note that the `SimpleTokenizer` does not support multi-character
tokens, so the `->` in a function signature is lexed as a `-` followed
by a `>` -- but this is fine for our purposes.
## Summary
In https://github.com/astral-sh/ruff/pull/6512, we added a flag to the
AST to mark implicitly-concatenated string expressions. This PR makes
use of that flag to remove the `is_implicit_concatenation` method.
## Test Plan
`cargo test`
## Summary
The bracketed-end-of-line comment rule is meant to assign comments like
this as "immediately following the bracket":
```python
f( # comment
1
)
```
However, the logic was such that we treated this equivalently:
```python
f(
( # comment
1
)
)
```
This PR modifies the placement logic to ensure that we only skip the
opening bracket, and not any nested brackets. The above is now formatted
as:
```python
f(
(
# comment
1
)
)
```
(But will be corrected once we handle parenthesized comments properly.)
## Test Plan
`cargo test`
Confirmed no change in similarity score.
## Summary
Per the discussion in
https://github.com/astral-sh/ruff/discussions/6183, this PR adds an
`implicit_concatenated` flag to the string and bytes constant variants.
It's not actually _used_ anywhere as of this PR, but it is covered by
the tests.
Specifically, we now use a struct for the string and bytes cases, along
with the `Expr::FString` node. That struct holds the value, plus the
flag:
```rust
#[derive(Clone, Debug, PartialEq, is_macro::Is)]
pub enum Constant {
Str(StringConstant),
Bytes(BytesConstant),
...
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct StringConstant {
/// The string value as resolved by the parser (i.e., without quotes, or escape sequences, or
/// implicit concatenations).
pub value: String,
/// Whether the string contains multiple string tokens that were implicitly concatenated.
pub implicit_concatenated: bool,
}
impl Deref for StringConstant {
type Target = str;
fn deref(&self) -> &Self::Target {
self.value.as_str()
}
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct BytesConstant {
/// The bytes value as resolved by the parser (i.e., without quotes, or escape sequences, or
/// implicit concatenations).
pub value: Vec<u8>,
/// Whether the string contains multiple string tokens that were implicitly concatenated.
pub implicit_concatenated: bool,
}
impl Deref for BytesConstant {
type Target = [u8];
fn deref(&self) -> &Self::Target {
self.value.as_slice()
}
}
```
## Test Plan
`cargo test`
**Summary** Implement docstring formatting
**Test Plan** Matches black's `docstring.py` fixture exactly, added some
new cases for what is hard to debug with black and with what black
doesn't cover.
similarity index:
main:
zulip: 0.99702
django: 0.99784
warehouse: 0.99585
build: 0.75623
transformers: 0.99469
cpython: 0.75989
typeshed: 0.74853
this branch:
zulip: 0.99702
django: 0.99784
warehouse: 0.99585
build: 0.75623
transformers: 0.99464
cpython: 0.75517
typeshed: 0.74853
The regression in transformers is actually an improvement in a file they
don't format with black (they run `black examples tests src utils
setup.py conftest.py`, the difference is in hubconf.py). cpython doesn't
use black.
Closes#6196
## Summary
This method is almost never what you actually want, because it doesn't
respect Python's scoping semantics. For example, if you call this within
a class method, it will return class attributes, whereas Python actually
_skips_ symbols in classes unless the load occurs within the class
itself. I also want to move away from these kinds of dynamic lookups and
more towards `resolve_name`, which performs a lookup based on the stored
`BindingId` at the time of symbol resolution, and will make it much
easier for us to separate model building from linting in the near
future.
## Test Plan
`cargo test`
## Summary
Fixes some TODOs introduced in
https://github.com/astral-sh/ruff/pull/6538. In short, given an
expression like `1 if x > 0 else "Hello, world!"`, we now return a union
type that says the expression can resolve to either an `int` or a `str`.
The system remains very limited, it only works for obvious primitive
types, and there's no attempt to do inference on any more complex
variables. (If any expression yields `Unknown` or `TypeError`, we
propagate that result throughout and abort on the client's end.)
## Summary
When adding an import, such as when fixing `I002`, ruff doesn't skip
whitespace between comments, but isort does. See this issue for more
detail: https://github.com/astral-sh/ruff/issues/6504
This change would fix that by skipping whitespace between comments in
`Insertion.start_of_file()`.
## Test Plan
I added a new test, `comments_and_newlines`, to verify this behavior. I
also ran `cargo test` and no existing tests broke. That being said, this
is technically a breaking change, as it's possible that someone was
relying on the previous behavior.
## Summary
Generalizes the abstractions for name matching introduced in
https://github.com/astral-sh/ruff/pull/6378 and applies them to the
existing `banned_api` rule, such that both rules have a uniform API and
implementation.
## Test Plan
`cargo test`
## Summary
Noticed in https://github.com/astral-sh/ruff/pull/6378. Given `import h;
import i`, we don't consider `import i` to be a "top-level" import for
E402 purposes, which is wrong. Similarly, we _do_ consider `import k` to
be a "top-level" import in:
```python
if __name__ == "__main__":
import j; \
import k
```
Using the semantic detection, rather than relying on newline position,
fixes both cases.
## Test Plan
`cargo test`
## Summary
Add a new rule `TID253` (`banned-module-level-imports`), to ban a
user-specified list of imports from appearing at module level. This rule
doesn't exist in `flake8-tidy-imports`, so it's unique to Ruff. The
implementation is pretty similar to `TID251`.
Briefly discussed
[here](https://github.com/astral-sh/ruff/discussions/6370).
## Test Plan
Added a new test case, checking that inline imports are allowed and that
non-inline imports from the banned list are disallowed.
## Summary
This PR modifies our logic for wrapping return type annotations.
Previously, we _always_ wrapped the annotation in parentheses if it
expanded; however, Black only exhibits this behavior when the function
parameters is empty (i.e., it doesn't and can't break). In other cases,
it uses the normal parenthesization rules, allowing nodes to bring their
own parentheses.
For example, given:
```python
def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> Set[
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
]:
...
def xxxxxxxxxxxxxxxxxxxxxxxxxxxx(x) -> Set[
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
]:
...
```
Black will format as:
```python
def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> (
Set[
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
]
):
...
def xxxxxxxxxxxxxxxxxxxxxxxxxxxx(
x,
) -> Set[
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
]:
...
```
Whereas, prior to this PR, Ruff would format as:
```python
def xxxxxxxxxxxxxxxxxxxxxxxxxxxx() -> (
Set[
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
]
):
...
def xxxxxxxxxxxxxxxxxxxxxxxxxxxx(
x,
) -> (
Set[
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
]
):
...
```
Closes https://github.com/astral-sh/ruff/issues/6431.
## Test Plan
Before:
- `zulip`: 0.99702
- `django`: 0.99784
- `warehouse`: 0.99585
- `build`: 0.75623
- `transformers`: 0.99470
- `cpython`: 0.75988
- `typeshed`: 0.74853
After:
- `zulip`: 0.99724
- `django`: 0.99791
- `warehouse`: 0.99586
- `build`: 0.75623
- `transformers`: 0.99474
- `cpython`: 0.75956
- `typeshed`: 0.74857
## Summary
This PR fixes some misformattings around optional parentheses for
expressions.
I first noticed that we were misformatting this:
```python
return (
unicodedata.normalize("NFKC", s1).casefold()
== unicodedata.normalize("NFKC", s2).casefold()
)
```
The above is stable Black formatting, but we were doing:
```python
return unicodedata.normalize("NFKC", s1).casefold() == unicodedata.normalize(
"NFKC", s2
).casefold()
```
Above, the "last" expression is a function call, so our
`can_omit_optional_parentheses` was returning `true`...
However, it turns out that Black treats function calls differently
depending on whether or not they have arguments -- presumedly because
they'll never split empty parentheses, and so they're functionally
non-useful. On further investigation, I believe this applies to all
parenthesized expressions. If Black can't split on the parentheses, it
doesn't leverage them when removing optional parentheses.
## Test Plan
Nice increase in similarity scores.
Before:
- `zulip`: 0.99702
- `django`: 0.99784
- `warehouse`: 0.99585
- `build`: 0.75623
- `transformers`: 0.99470
- `cpython`: 0.75989
- `typeshed`: 0.74853
After:
- `zulip`: 0.99705
- `django`: 0.99795
- `warehouse`: 0.99600
- `build`: 0.75623
- `transformers`: 0.99471
- `cpython`: 0.75989
- `typeshed`: 0.74853
**Summary** Some files seems notoriously slow in the formatter (secons in debug mode). This time was however almost exclusively spent in the diff algorithm to collect the similarity index, so i replaced that. I kept `similar` for printing actual diff to avoid rewriting that too, with the disadvantage that we now have to diff libraries in format_dev.
I used this PR to remove the spinner from tracing-indicatif and changed `flamegraph --perfdata perf.data` to `flamegraph --perfdata perf.data --no-inline` as the former wouldn't finish for me on release builds with debug info.
## Summary
This PR adds formatting support for `MatchCase` node with subs for the
`Pattern`
nodes.
## Test Plan
Added test cases for case node handling with comments, newlines.
resolves: #6299
## Summary
The bug was happening in this
[loop](75f402eb82/crates/ruff_python_formatter/src/comments/placement.rs (L545)).
Basically, In the first iteration of the loop, the `comment_indentation`
is bigger than `child_indentation` (`comment_indentation` is 7 and
`child_indentation` is 4) making the `Ordering::Greater` branch execute.
Inside the `Ordering::Greater` branch, the `if` block gets executed,
resulting in the update of these variables.
```rust
parent_body = current_body;
current_body = Some(last_child_in_current_body);
last_child_in_current_body = nested_child;
```
In the second iteration of the loop, `comment_indentation` is smaller
than `child_indentation` (`comment_indentation` is 7 and
`child_indentation` is 8) making the `Ordering::Less` branch execute.
Inside the `Ordering::Less` branch, the `if` block gets executed, this
is where the bug was happening. At this point `parent_body` should be a
`StmtFunctionDef` but it was a `StmtClassDef`. Causing the comment to be
incorrectly formatted.
That happened for the following code:
```python
class A:
def f():
pass
# strangely indented comment
print()
```
There is only one problem that I couldn't figure it out a solution, the
variable `current_body` in this
[line](75f402eb82/crates/ruff_python_formatter/src/comments/placement.rs (L542C5-L542C49))
now gives this warning _"value assigned to `current_body` is never read
maybe it is overwritten before being read?"_
Any tips on how to solve that?
Closes#5337
## Test Plan
Add new test case.
---------
Co-authored-by: konstin <konstin@mailbox.org>
**Summary** Implement `DerefMut` for `WithNodeLevel` so it can be used
in the same way as `PyFormatter`. I want this for my WIP upstack branch
to enable `.fmt(f)` on `WithNodeLevel` context. We could extend this to
remove the other two method from `WithNodeLevel`.
## Summary
Some follow-ups to https://github.com/astral-sh/ruff/pull/6131 to ensure
that fixes are inserted _after_ function docstrings, and that fixes are
robust to a bunch of edge cases.
## Test Plan
`cargo test`
## Summary
This PR respects our unused variable regex when flagging bound
exceptions, so that you no longer get a violation for, e.g.:
```python
def f():
try:
pass
except Exception as _:
pass
```
This is an odd pattern, but I think it's surprising that the regex
_isn't_ respected here.
Closes https://github.com/astral-sh/ruff/issues/6391
## Test Plan
`cargo test`
## Summary
In https://github.com/astral-sh/ruff/pull/5811, I suggested that we add
a heuristic to the overlong-lines check such that if the line had fewer
bytes than the character limit, we return early -- the idea being that a
single byte per character was the "worst case". I overlooked that this
isn't true for tabs -- with tabs, the "worst case" scenario is that
every byte is a tab, which can have a width greater than 1.
Closes https://github.com/astral-sh/ruff/issues/6425.
## Test Plan
`cargo test` with a new fixture borrowed from the issue, plus manual
testing.
## Summary
Checks for any misspelled dunder name method and for any method defined
with `__...__` that's not one of the pre-defined methods.
The pre-defined methods encompass all of Python's standard dunder
methods.
ref: #970
## Test Plan
Snapshots and manual runs of pylint.
## Summary
Our `is_builtin` check did a naive walk over the parent scopes; instead,
it needs to (e.g.) skip symbols in a class scope if being called outside
of the class scope itself.
Closes https://github.com/astral-sh/ruff/issues/6466.
## Test Plan
`cargo test`
## Summary
Reopening of https://github.com/astral-sh/ruff/pull/4880
One open TODO as described in:
https://github.com/astral-sh/ruff/pull/4880#discussion_r1265110215
FYI @charliermarsh seeing as you commented you wanted to do final review
and merge. @konstin @dhruvmanila @MichaReiser as previous reviewers.
# Old Description
## Summary
Adds an autofix for B006 turning mutable argument defaults into None and
setting their original value back in the function body if still `None`
at runtime like so:
```python
def before(x=[]):
pass
def after(x=None):
if x is None:
x = []
pass
```
## Test Plan
Added an extra test case to existing fixture with more indentation.
Checked results for all old examples.
NOTE: Also adapted the jupyter notebook test as this checked for B006 as
well.
## Issue link
Closes: https://github.com/charliermarsh/ruff/issues/4693
---------
Co-authored-by: konstin <konstin@mailbox.org>
**Summary** I collected all examples of end-of-line comments after
opening parentheses that i could think of so we get a comprehensive view
at the state of their formatting (#6390).
This PR intentionally only adds tests cases without any changes in
formatting. We need to decide which exact formatting we want, ideally in
terms of these test files, and implement this in follow-up PRs.
~~One stability check is still deactivated pending
https://github.com/astral-sh/ruff/pull/6386.~~
We currently don't format all comments as match statements are not yet implemented. We can work around this for the top level match statement by setting them manually formatted but the mocked-out top level match doesn't call into its children so they would still have unformatted comments
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## Summary
This PR fixes the issue where the FString formatting dropped dangling comments between the string parts.
```python
result_f = (
f' File "{__file__}", line {lineno_f+1}, in f\n'
' f()\n'
# XXX: The following line changes depending on whether the tests
# are run through the interactive interpreter or with -m
# It also varies depending on the platform (stack size)
# Fortunately, we don't care about exactness here, so we use regex
r' \[Previous line repeated (\d+) more times\]' '\n'
'RecursionError: maximum recursion depth exceeded\n'
)
```
The solution here isn't ideal because it re-introduces the `enclosing_parent` on `DecoratedComment` but it is the easiest fix that I could come up.
I didn't spend more time finding another solution becaues I think we have to re-write most of the fstring formatting with the upcoming Python 3.12 support (because lexing the individual parts as we do now will no longer work).
closes#6440
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo test`
The child PR testing that all comments are formatted should now pass
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## Summary
This PR adds the `AnyNodeRef.visit_preorder` method. I'll need this method to mark all comments of a suppressed node's children as formatted (in debug builds).
I'm not super happy with this because it now requires a double-dispatch where the `walk_*` methods call into `node.visit_preorder` and the `visit_preorder` then calls back into the visitor. Meaning,
the new implementation now probably results in way more function calls. The other downside is that `AnyNodeRef` now contains code that is difficult to auto-generate. This could be mitigated by extracting the `visit_preorder` method into its own `VisitPreorder` trait.
Anyway, this approach solves the need and avoids duplicating the visiting code once more.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo test`
<!-- How was it tested? -->
## Summary
The use of `|` as a union operator is not always safe, if a type
annotation is evaluated in a runtime context. For example, this code
errors at runtime:
```python
import httpretty
import requests_mock
item: type[requests_mock.Mocker | httpretty] = requests_mock.Mocker
```
However, it's fine in a `.pyi` file, with `__future__` annotations`, or
if the annotation is in a non-evaluated context, like:
```python
def func():
item: type[requests_mock.Mocker | httpretty] = requests_mock.Mocker
```
This PR modifies the rule to avoid enforcing in those invalid,
runtime-evaluated contexts.
Closes https://github.com/astral-sh/ruff/issues/6455.
## Summary
Use the same Python version by default for all tests (our
latest-supported version).
## Test Plan
`cargo test`
---------
Co-authored-by: Zanie <contact@zanie.dev>
## Summary
I think it makes sense for `PythonVersion::default()` to return our
minimum-supported non-EOL version.
## Test Plan
`cargo test`
---------
Co-authored-by: Zanie <contact@zanie.dev>
## Summary
This PR renames the `MagicCommand` token to `IpyEscapeCommand` token and
`MagicKind` to `IpyEscapeKind` type to better reflect the purpose of the
token and type. Similarly, it renames the AST nodes from `LineMagic` to
`IpyEscapeCommand` prefixed with `Stmt`/`Expr` wherever necessary.
It also makes renames from using `jupyter_magic` to
`ipython_escape_commands` in various function names.
The mode value is still `Mode::Jupyter` because the escape commands are
part of the IPython syntax but the lexing/parsing is done for a Jupyter
notebook.
### Motivation behind the rename:
* IPython codebase defines it as "EscapeCommand" / "Escape Sequences":
* Escape Sequences:
292e3a2345/IPython/core/inputtransformer2.py (L329-L333)
* Escape command:
292e3a2345/IPython/core/inputtransformer2.py (L410-L411)
* The word "magic" is used mainly for the actual magic commands i.e.,
the ones starting with `%`/`%%`
(https://ipython.readthedocs.io/en/stable/interactive/reference.html#magic-command-system).
So, this avoids any confusion between the Magic token (`%`, `%%`) and
the escape command itself.
## Test Plan
* `cargo test` to make sure all renames are done correctly.
* `grep` for `jupyter_escape`/`magic` to make sure all renames are done
correctly.
## Summary
This PR removes the group around function definition parameters, instead
grouping the parameters with the type parameters and return type
annotation.
This increases Zulip's similarity score from 0.99385 to 0.99699, so it's
a meaningful improvement. However, there's at least one stability error
that I'm working on, and I'm really just looking for high-level feedback
at this point, because I'm not happy with the solution.
Closes https://github.com/astral-sh/ruff/issues/6352.
## Test Plan
Before:
- `zulip`: 0.99396
- `django`: 0.99784
- `warehouse`: 0.99578
- `build`: 0.75436
- `transformers`: 0.99407
- `cpython`: 0.75987
- `typeshed`: 0.74432
After:
- `zulip`: 0.99702
- `django`: 0.99784
- `warehouse`: 0.99585
- `build`: 0.75623
- `transformers`: 0.99470
- `cpython`: 0.75988
- `typeshed`: 0.74853
## Summary
In https://github.com/astral-sh/ruff/pull/6397, the documentation was
updated stating that the default target-version is now "py38", but the
actual default value wasn't updated and remained py310. This commit
updates the default value to match what the documentation says.
## Summary
This PR adds support for a stricter version of help end escape
commands[^1] in the parser. By stricter, I mean that the escape tokens
are only at the end of the command and there are no tokens at the start.
This makes it difficult to implement it in the lexer without having to
do a lot of look aheads or keeping track of previous tokens.
Now, as we're adding this in the parser, the lexer needs to recognize
and emit a new token for `?`. So, `Question` token is added which will
be recognized only in `Jupyter` mode.
The conditions applied are the same as the ones in the original
implementation in IPython codebase (which is a regex):
* There can only be either 1 or 2 question mark(s) at the end
* The node before the question mark can be a `Name`, `Attribute`,
`Subscript` (only with integer constants in slice position), or any
combination of the 3 nodes.
## Test Plan
Added test cases for various combination of the possible nodes in the
command value position and update the snapshots.
fixes: #6359fixes: #5030 (This is the final piece)
[^1]: https://github.com/astral-sh/ruff/pull/6272#issue-1833094281
## Summary
Error if `tab-size` is set to zero (it is used as a divisor). Closes
#6423.
Also fixes a typo.
## Test Plan
Running ruff with a config
```toml
[tool.ruff]
tab-size = 0
```
returns an error message to the user saying that `tab-size` must be
greater than zero.
## Summary
Given:
```python
def double(a: int) -> ( # Hello
int
):
return 2*a
```
We currently treat `# Hello` as a trailing comment on the parameters
(`(a: int)`). This PR adds a placement method to instead treat it as a
dangling comment on the function definition itself, so that it gets
formatted at the end of the definition, like:
```python
def double(a: int) -> int: # Hello
return 2*a
```
The formatting in this case is unchanged, but it's incorrect IMO for
that to be a trailing comment on the parameters, and that placement
leads to an instability after changing the grouping in #6410.
Fixing this led to a _different_ instability related to tuple return
type annotations, like:
```python
def zrevrangebylex(self, name: _Key, max: _Value, min: _Value, start: int | None = None, num: int | None = None) -> ( # type: ignore[override]
):
...
```
(This is a real example.)
To fix, I had to special-case tuples in that spot, though I'm not
certain that's correct.
## Summary
This PR moves `empty_parenthesized` such that it's peer to
`parenthesized`, and changes the API to better match that of
`parenthesized` (takes `&str` rather than `StaticText`, has a
`with_dangling_comments` method, etc.).
It may be intentionally _not_ part of `parentheses.rs`, but to me
they're so similar that it makes more sense for them to be in the same
module, with the same API, etc.
## Summary
This PR adds support for `StmtMatch` with subs for `MatchCase`.
## Test Plan
Add a few additional test cases around `match` statement, comments, line
breaks.
resolves: #6298
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fix name of rule in example of `extend-per-file-ignores` in `options.rs`
file.
It was `E401` but in configuration example `E402` was listed. Just a
tiny mismatch.
## Test Plan
<!-- How was it tested? -->
Just by my eyes :).
## Bug
Given
```python
x = () - (#
)
```
the comment is a dangling comment of the empty tuple. This is an
end-of-line comment so it may move after the expression. It still
expands the parent, so the operator breaks:
```python
x = (
()
- () #
)
```
In the next formatting pass, the comment is not a trailing tuple but a
trailing bin op comment, so the bin op doesn't break anymore. The
comment again expands the parent, so we still add the superfluous
parentheses
```python
x = (
() - () #
)
```
## Fix
The new formatting is to keep the comment on the empty tuple. This is a
log uglier and again has additional outer parentheses, but it's stable:
```python
x = (
()
- ( #
)
)
```
## Alternatives
Black formats all the examples above as
```python
x = () - () #
```
which i find better.
I would be happy about any suggestions for better solutions than the
current one. I'd mainly need a workaround for expand parent having an
effect on the bin op instead of first moving the comment to the end and
then applying expand parent to the assign statement.
## Summary
Manually add the parentheses around tuple expressions for the autofix in
`B014`.
This is also done in various other autofixes as well such as for
[`RUF005`](6df5ab4098/crates/ruff/src/rules/ruff/rules/collection_literal_concatenation.rs (L183-L184)),
[`UP024`](6df5ab4098/crates/ruff/src/rules/pyupgrade/rules/os_error_alias.rs (L137-L137)).
### Alternate Solution
An alternate solution would be to fix this in the `Generator` itself by
checking
if the tuple expression needs to be generated at the top-level or not.
If so,
then always add the parentheses.
```rust
} else if level == 0 {
// Top-level tuples are always parenthesized.
self.p("(");
let mut first = true;
for elt in elts {
self.p_delim(&mut first, ", ");
self.unparse_expr(elt, precedence::COMMA);
}
self.p_if(elts.len() == 1, ",");
self.p(")");
```
## Test Plan
Add a regression test for this case in `B014`.
fixes: #6412
Extends #6289 to support moving type variable usage in type aliases to
use PEP-695.
Does not remove the possibly unused type variable declaration.
Presumably this is handled by other rules, but is not working for me.
Does not handle type variables with bounds or variance declarations yet.
Part of #4617
## Summary
We have some logic in the expression analyzer method to avoid
re-checking the inner `Union` in `Union[Union[...]]`, since the methods
that analyze `Union` expressions already recurse. Elsewhere, we have
logic to avoid re-checking the inner `|` in `int | (int | str)`, for the
same reason.
This PR unifies that logic into a single method _and_ ensures that, just
as we recurse over both `Union` and `|`, we also detect that we're in
_either_ kind of nested union.
Closes https://github.com/astral-sh/ruff/issues/6285.
## Test Plan
Added some new snapshots.
## Summary
We can anticipate earlier that this will error, so we should avoid
flagging the error at all. Specifically, we're talking about cases like
`"{1} {0}".format(*args)"`, in which we'd need to reorder the arguments
in order to remove the `1` and `0`, but we _can't_ reorder the arguments
since they're not statically analyzable.
Closes https://github.com/astral-sh/ruff/issues/6388.
## Summary
I noticed some deviations in how we treat dangling comments that hug the
opening parenthesis for function definitions.
For example, given:
```python
def f( # first
# second
): # third
...
```
We currently format as:
```python
def f(
# first
# second
): # third
...
```
This PR adds the proper opening-parenthesis dangling comment handling
for function parameters. Specifically, as with all other parenthesized
nodes, we now detect that dangling comment in `placement.rs` and handle
it in `parameters.rs`. We have to take some care in that file, since we
have multiple "kinds" of dangling comments, but I added a bunch of test
cases that we now format identically to Black.
## Test Plan
`cargo test`
Before:
- `zulip`: 0.99388
- `django`: 0.99784
- `warehouse`: 0.99504
- `transformers`: 0.99404
- `cpython`: 0.75913
- `typeshed`: 0.74364
After:
- `zulip`: 0.99386
- `django`: 0.99784
- `warehouse`: 0.99504
- `transformers`: 0.99404
- `cpython`: 0.75913
- `typeshed`: 0.74409
Meaningful improvement on `typeshed`, minor decrease on `zulip`.
Closes https://github.com/astral-sh/ruff/issues/6068
These commits are kind of a mess as I did some stumbling around here.
Unrolls formatting of chained boolean operations to prevent nested
grouping which gives us Black-compatible formatting where each boolean
operation is on a new line.
## Summary
This PR modifies our `can_omit_optional_parentheses` rules to ensure
that if we see a call followed by an attribute, we treat that as an
attribute access rather than a splittable call expression.
This in turn ensures that we wrap like:
```python
ct_match = aaaaaaaaaaact_id == self.get_content_type(
obj=rel_obj, using=instance._state.db
)
```
For calls, but:
```python
ct_match = (
aaaaaaaaaaact_id == self.get_content_type(obj=rel_obj, using=instance._state.db).id
)
```
For calls with trailing attribute accesses.
Closes https://github.com/astral-sh/ruff/issues/6065.
## Test Plan
Similarity index before:
- `zulip`: 0.99436
- `django`: 0.99779
- `warehouse`: 0.99504
- `transformers`: 0.99403
- `cpython`: 0.75912
- `typeshed`: 0.72293
And after:
- `zulip`: 0.99436
- `django`: 0.99780
- `warehouse`: 0.99504
- `transformers`: 0.99404
- `cpython`: 0.75913
- `typeshed`: 0.72293
## Summary
This PR leverages the unified function definition node to add precise
AST node types to `MemberKind`, which is used to power our docstring
definition tracking (e.g., classes and functions, whether they're
methods or functions or nested functions and so on, whether they have a
docstring, etc.). It was painful to do this in the past because the
function variants needed to support a union anyway, but storing precise
nodes removes like a dozen panics.
No behavior changes -- purely a refactor.
## Test Plan
`cargo test`
## Summary
Per the suggestion in
https://github.com/astral-sh/ruff/discussions/6183, this PR removes
`AsyncWith`, `AsyncFor`, and `AsyncFunctionDef`, replacing them with an
`is_async` field on the non-async variants of those structs. Unlike an
interpreter, we _generally_ have identical handling for these nodes, so
separating them into distinct variants adds complexity from which we
don't really benefit. This can be seen below, where we get to remove a
_ton_ of code related to adding generic `Any*` wrappers, and a ton of
duplicate branches for these cases.
## Test Plan
`cargo test` is unchanged, apart from parser snapshots.
## Summary
See discussion in
https://github.com/astral-sh/ruff/pull/6351#discussion_r1284996979. We
can remove `RefEquality` entirely and instead use a text offset for
statement keys, since no two statements can start at the same text
offset.
## Test Plan
`cargo test`
## Summary
This PR adds support for help end escape command in the lexer.
### What are "help end escape commands"?
First, the escape commands are special IPython syntax which enhances the
functionality for the IPython REPL. There are 9 types of escape kinds
which are recognized by the tokens which are present at the start of the
command (`?`, `??`, `!`, `!!`, etc.).
Here, the help command is using either the `?` or `??` token at the
start (`?str.replace` for example). Those 2 tokens are also supported
when they're at the end of the command (`str.replace?`), but the other
tokens aren't supported in that position.
There are mainly two types of help end escape commands:
1. Ending with either `?` or `??`, but it also starts with one of the
escape tokens (`%matplotlib?`)
2. On the other hand, there's a stricter version for (1) which doesn't
start with any escape tokens (`str.replace?`)
This PR adds support for (1) while (2) will be supported in the parser.
### Priority
Now, if the command starts and ends with an escape token, how do we
decide the kind of this command? This is where priority comes into
picture. This is simple as there's only one priority where `?`/`??` at
the end takes priority over any other escape token and all of the other
tokens are at the same priority. Remember that only `?`/`??` at the end
is considered valid.
This is mainly useful in the case where someone would want to invoke the
help command on the magic command itself. For example, in `%matplotlib?`
the help command takes priority which means that we want help for the
`matplotlib` magic function instead of calling the magic function
itself.
### Specification
Here's where things get a bit tricky. What if there are question mark
tokens at both ends. How do we decide if it's `Help` (`?`) kind or
`Help2` (`??`) kind?
| | Magic | Value | Kind |
| --- | --- | --- | --- |
| 1 | `?foo?` | `foo` | `Help` |
| 2 | `??foo?` | `foo` | `Help` |
| 3 | `?foo??` | `foo` | `Help2` |
| 4 | `??foo??` | `foo` | `Help2` |
| 5 | `???foo??` | `foo` | `Help2` |
| 6 | `??foo???` | `foo???` | `Help2` |
| 7 | `???foo???` | `?foo???` | `Help2` |
Looking at the above table:
- The question mark tokens on the right takes priority over the ones on
the left but only if the number of question mark on the right is 1 or 2.
- If there are more than 2 question mark tokens on the right side, then
the left side is used to determine the same.
- If the right side is used to determine the kind, then all of the
question marks and whitespaces on the left side are ignored in the
`value`, but if it’s the other way around, then all of the extra
question marks are part of the `value`.
### References
- IPython implementation using the regex:
292e3a2345/IPython/core/inputtransformer2.py (L454-L462)
- Priorities:
292e3a2345/IPython/core/inputtransformer2.py (L466-L469)
## Test Plan
Add a bunch of test cases for the lexer and verify that it matches the
behavior of
IPython transformer.
resolves: #6357
## Summary
This PR fixes the performance degradation introduced in
https://github.com/astral-sh/ruff/pull/6345. Instead of using the
generic `Nodes` structs, we now use separate `Statement` and
`Expression` structs. Importantly, we can avoid tracking a bunch of
state for expressions that we need for parents: we don't need to track
reference-to-ID pointers (we just have no use-case for this -- I'd
actually like to remove this from statements too, but we need it for
branch detection right now), we don't need to track depth, etc.
In my testing, this entirely removes the regression on all-rules, and
gets us down to 2ms slower on the default rules (as a crude hyperfine
benchmark, so this is within margin of error IMO).
No behavioral changes.
## Summary
This PR attempts to draw a clearer divide between "methods that take
(e.g.) an expression or statement as input" and "methods that rely on
the _current_ expression or statement" in the semantic model, by
renaming methods like `stmt()` to `current_statement()`.
This had led to confusion in the past. For example, prior to this PR, we
had `scope()` (which returns the current scope), and `parent_scope`,
which returns the parent _of a scope that's passed in_. Now, the API is
clearer: `current_scope` returns the current scope, and `parent_scope`
takes a scope as argument and returns its parent.
Per above, I also changed `stmt` to `statement` and `expr` to
`expression`.
## Summary
Given:
```python
[ # comment
first,
second,
third
] # another comment
```
We were adding a hard line break as part of the formatting of `#
comment`, which led to the following formatting:
```python
[first, second, third] # comment
# another comment
```
Closes https://github.com/astral-sh/ruff/issues/6367.
## Summary
Fixes an instability whereby this:
```python
def get_recent_deployments(threshold_days: int) -> Set[str]:
# Returns a list of deployments not older than threshold days
# including `/root/zulip` directory if it exists.
recent = set()
threshold_date = datetime.datetime.now() - datetime.timedelta( # noqa: DTZ005
days=threshold_days
)
```
Was being formatted as:
```python
def get_recent_deployments(threshold_days: int) -> Set[str]:
# Returns a list of deployments not older than threshold days
# including `/root/zulip` directory if it exists.
recent = set()
threshold_date = (
datetime.datetime.now()
- datetime.timedelta(days=threshold_days) # noqa: DTZ005
)
```
Which was in turn being formatted as:
```python
def get_recent_deployments(threshold_days: int) -> Set[str]:
# Returns a list of deployments not older than threshold days
# including `/root/zulip` directory if it exists.
recent = set()
threshold_date = (
datetime.datetime.now() - datetime.timedelta(days=threshold_days) # noqa: DTZ005
)
```
The second-to-third formattings still differs from Black because we
aren't taking the line suffix into account when splitting
(https://github.com/astral-sh/ruff/issues/6377), but the first
formatting is correct and should be unchanged (i.e., the first-to-second
formattings is incorrect, and fixed here).
## Test Plan
`cargo run --bin ruff_dev -- format-dev --stability-check ../zulip`
## Summary
When we iterate over the AST for analysis, we often process nodes in a
"deferred" manner. For example, if we're analyzing a function, we push
the function body onto a deferred stack, along with a snapshot of the
current semantic model state. Later, when we analyze the body, we
restore the semantic model state from the snapshot. This ensures that we
know the correct scope, hierarchy of statement parents, etc., when we go
to analyze the function body.
Historically, we _haven't_ included the _expression_ hierarchy in the
model snapshot -- so we track the current expression parents in the
visitor, but we never save and restore them when processing deferred
nodes. This can lead to subtle bugs, in that methods like
`expr_parent()` aren't guaranteed to be correct, if you're in a deferred
visitor.
This PR migrates expression tracking to mirror statement tracking
exactly. So we push all expressions onto an `IndexVec`, and include the
current expression on the snapshot. This ensures that `expr_parent()`
and related methods are "always correct" rather than "sometimes
correct".
There's a performance cost here, both at runtime and in terms of memory
consumption (we now store an additional pointer for every expression).
In my hyperfine testing, it's about a 1% performance decrease for
all-rules on CPython (up to 533.8ms, from 528.3ms) and a 4% performance
decrease for default-rules on CPython (up to 212ms, from 204ms).
However... I think this is worth it given the incorrectness of our
current approach. In the future, we may want to reconsider how we do
these upward traversals (e.g., with something like a red-green tree).
(**Note**: in https://github.com/astral-sh/ruff/pull/6351, the slowdown
seems to be entirely removed.)
Changes:
- Fixes typo and repeated phrase in `DTZ002`
- Adds docs for `DTZ003`
- Adds docs for `DTZ004`
- Adds example for <=Python3.10 in `DTZ001`
Related to: https://github.com/astral-sh/ruff/issues/2646
## Summary
Historically, we've stored "qualified names" on our
`BindingKind::Import`, `BindingKind::SubmoduleImport`, and
`BindingKind::ImportFrom` structs. In Ruff, a "qualified name" is a
dot-separated path to a symbol. For example, given `import foo.bar`, the
"qualified name" would be `"foo.bar"`; and given `from foo.bar import
baz`, the "qualified name" would be `foo.bar.baz`.
This PR modifies the `BindingKind` structs to instead store _call paths_
rather than qualified names. So in the examples above, we'd store
`["foo", "bar"]` and `["foo", "bar", "baz"]`. It turns out that this
more efficient given our data access patterns. Namely, we frequently
need to convert the qualified name to a call path (whenever we call
`resolve_call_path`), and it turns out that we do this operation enough
that those conversations show up on benchmarks.
There are a few other advantages to using call paths, rather than
qualified names:
1. The size of `BindingKind` is reduced from 32 to 24 bytes, since we no
longer need to store a `String` (only a boxed slice).
2. All three import types are more consistent, since they now all store
a boxed slice, rather than some storing an `&str` and some storing a
`String` (for `BindingKind::ImportFrom`, we needed to allocate a
`String` to create the qualified name, but the call path is a slice of
static elements that don't require that allocation).
3. A lot of code gets simpler, in part because we now do call path
resolution "earlier". Most notably, for relative imports (`from .foo
import bar`), we store the _resolved_ call path rather than the relative
call path, so the semantic model doesn't have to deal with that
resolution. (See that `resolve_call_path` is simpler, fewer branches,
etc.)
In my testing, this change improves the all-rules benchmark by another
4-5% on top of the improvements mentioned in #6047.
## Summary
Update `F841` autofix to not remove line magic expr
## Test Plan
Added test case for assignment statement with and without type
annotation
fixes: #6116
## Summary
Enable using the new `Mode::Jupyter` for the tokenizer/parser to parse
Jupyter line magic tokens.
The individual call to the lexer i.e., `lex_starts_at` done by various
rules should consider the context of the source code (is this content
from a Jupyter Notebook?). Thus, a new field `source_type` (of type
`PySourceType`) is added to `Checker` which is being passed around as an
argument to the relevant functions. This is then used to determine the
`Mode` for the lexer.
## Test Plan
Add new test cases to make sure that the magic statement is considered
while generating the diagnostic and autofix:
* For `I001`, if there's a magic statement in between two import blocks,
they should be sorted independently
fixes: #6090
## Summary
As of version
[23.1.0](2a86db8271/CHANGELOG.md?plain=1#L158-L160),
`flake8-pyi` remove the rule `Y027`.
The errors that resulted in `PYI027` are now being emitted by `PYI022`
(`UP035`).
ref: #848
## Test Plan
Add new tests cases.
## Summary
Previously, failed on methods like:
```python
@classmethod
def bad_posonly_class_method(cls: type[_S], /) -> _S: ... # PYI019
```
Since we check if there are any positional-only or non-positional
arguments, but then do an unsafe access on `parameters.args`.
Closes https://github.com/astral-sh/ruff/issues/6349.
## Test Plan
`cargo test` (verified that `main` panics on the new fixtures)
These rules assume that the docstring is on its own line. pydocstyle
treats them inconsistently, so I'm just going to disable them in this
case.
Closes https://github.com/astral-sh/ruff/issues/6329.
## Summary
Fixes some comprehension formatting by avoiding creating the group for
the comprehension itself (so that if it breaks, all parts break on their
own lines, e.g. the `for` and the `if` clauses).
Closes https://github.com/astral-sh/ruff/issues/6063.
## Test Plan
Bunch of new fixtures.
Implement fluent style/call chains. See the `call_chains.py` formatting
for examples.
This isn't fully like black because in `raise A from B` they allow `A`
breaking can influence the formatting of `B` even if it is already
multiline.
Similarity index:
| project | main | PR |
|--------------|-------|-------|
| build | ??? | 0.753 |
| django | 0.991 | 0.998 |
| transformers | 0.993 | 0.994 |
| typeshed | 0.723 | 0.723 |
| warehouse | 0.978 | 0.994 |
| zulip | 0.992 | 0.994 |
Call chain formatting is affected by
https://github.com/astral-sh/ruff/issues/627, but i'm cutting scope
here.
Closes#5343
**Test Plan**:
* Added a dedicated call chains test file
* The ecosystem checks found some bugs
* I manually check django and zulip formatting
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
## Summary
Extends `comparison-with-itself` to cover simple function calls on
known-pure functions, like `id`. For example, we now flag `id(x) ==
id(x)`.
Closes https://github.com/astral-sh/ruff/issues/6276.
## Test Plan
`cargo test`
**Summary** This adds the information whether we're in a .py python
source file or in a .pyi stub file to enable people working on #5822 and
related issues.
I'm not completely happy with `Default` for something that depends on
the input.
**Test Plan** None, this is currently unused, i'm leaving this to first
implementation of stub file specific formatting.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
Follow-up to https://github.com/astral-sh/ruff/pull/6325, to avoid false
positives in cases like:
```python
if x == int:
...
```
Which is valid, since we don't know that we're comparing the type _of_
something -- we're comparing the type objects directly.
## Summary
Extends `type-comparison` to flag:
```python
if type(obj) is int:
pass
```
In addition to the existing cases, like:
```python
if type(obj) is type(1):
pass
```
Closes https://github.com/astral-sh/ruff/issues/6260.
## Summary
We already support preserving the end-of-line comment in calls and type
parameters, as in:
```python
foo( # comment
bar,
)
```
This PR adds the same behavior for lists, sets, comprehensions, etc.,
such that we preserve:
```python
[ # comment
1,
2,
3,
]
```
And related cases.
## Summary
This PR adds an API for chaining comment placement methods based on the
[`then_with`](https://doc.rust-lang.org/std/cmp/enum.Ordering.html#method.then_with)
from `Ordering` in the standard library.
For example, you can now do:
```rust
try_some_case(comment).then_with(|comment| try_some_other_case_if_still_default(comment))
```
This lets us avoid this kind of pattern, which I've seen in
`placement.rs` and used myself before:
```rust
let comment = match handle_own_line_comment_between_branches(comment, preceding, locator) {
CommentPlacement::Default(comment) => comment,
placement => return placement,
};
```
## Summary
This ensures that we treat `# comment` as parenthesized in contexts
like:
```python
while (
True
# comment
):
pass
```
The same logic applies equally to `for`, `async for`, `if`, `with`, and
`async with`. The general pattern is that you have an expression which
precedes a colon-separated suite.
**Summary** Prompted by
https://github.com/astral-sh/ruff/pull/6257#issuecomment-1661308410, it
tried to make the ecosystem script output on failure better
understandable. All log messages are now written to a file, which is
printed on error. Running locally progress is still shown.
Looking through the log output i saw that we currently log syntax errors
in input, which is confusing because they aren't actual errors, but we
don't check that these files don't change due to parser regressions or
improvements. I added `--files-with-errors` to catch that.
**Test Plan** CI
Adds rule to convert type aliases defined with annotations i.e. `x:
TypeAlias = int` to the new PEP-695 syntax e.g. `type x = int`.
Does not support using new generic syntax for type variables, will be
addressed in a follow-up.
Added as part of pyupgrade — ~the code 100 as chosen to avoid collision
with real pyupgrade codes~.
Part of #4617
Builds on #5062
Of the rules that flake8-pyi enforces for `.pyi` type stubs, many of
them equally make sense to check in normal runtime code with type
annotations. Broaden these rules to check all files:
PYI013 ellipsis-in-non-empty-class-body
PYI016 duplicate-union-member
PYI018 unused-private-type-var
PYI019 custom-type-var-return-type
PYI024 collections-named-tuple
PYI025 unaliased-collections-abc-set-import
PYI030 unnecessary-literal-union
PYI032 any-eq-ne-annotation
PYI034 non-self-return-type
PYI036 bad-exit-annotation
PYI041 redundant-numeric-union
PYI042 snake-case-type-alias
PYI043 t-suffixed-type-alias
PYI045 iter-method-return-iterable
PYI046 unused-private-protocol
PYI047 unused-private-type-alias
PYI049 unused-private-typed-dict
PYI050 no-return-argument-annotation-in-stub (Python ≥ 3.11)
PYI051 redundant-literal-union
PYI056 unsupported-method-call-on-all
The other rules are stub-specific and remain enabled only in `.pyi`
files.
PYI001 unprefixed-type-param
PYI002 complex-if-statement-in-stub
PYI003 unrecognized-version-info-check
PYI004 patch-version-comparison
PYI005 wrong-tuple-length-version-comparison (could make sense to
broaden, see
https://github.com/astral-sh/ruff/pull/6297#issuecomment-1663314807)
PYI006 bad-version-info-comparison (same)
PYI007 unrecognized-platform-check
PYI008 unrecognized-platform-name
PYI009 pass-statement-stub-body
PYI010 non-empty-stub-body
PYI011 typed-argument-default-in-stub
PYI012 pass-in-class-body
PYI014 argument-default-in-stub
PYI015 assignment-default-in-stub
PYI017 complex-assignment-in-stub
PYI020 quoted-annotation-in-stub
PYI021 docstring-in-stub
PYI026 type-alias-without-annotation (could make sense to broaden, but
gives many false positives on runtime code as currently implemented)
PYI029 str-or-repr-defined-in-stub
PYI033 type-comment-in-stub
PYI035 unassigned-special-variable-in-stub
PYI044 future-annotations-in-stub
PYI048 stub-body-multiple-statements
PYI052 unannotated-assignment-in-stub
PYI053 string-or-bytes-too-long
PYI054 numeric-literal-too-long
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
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## Summary
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In Python >= 3.7, `await` can be included in f-strings.
https://bugs.python.org/issue28942
## Test Plan
<!-- How was it tested? -->
Existing tests
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## Summary
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#2646
## Test Plan
<!-- How was it tested? -->
## Summary
Implements `Y019` from
[flake8-pyi](https://github.com/PyCQA/flake8-pyi).
The rule checks if
- instance methods that return `self`
- class methods that return an instance of `cls`
- `__new__` methods
Return a custom `TypeVar` instead of `typing.Self` and raises a
violation if this is the case. The rule also covers
[PEP-695](https://peps.python.org/pep-0695/) syntax as introduced in
upstream in https://github.com/PyCQA/flake8-pyi/pull/402
## Test Plan
Added fixtures with test cases from upstream implementation (plus
additional one for an excluded edge case, mentioned in upstream
implementation)
## Summary
Relates to #970.
Add new `bad-format-character` Pylint rule.
I had to make a change in `crates/ruff_python_literal/src/format.rs` to
get a more detailed error in case the format character is not correct. I
chose to do this since most of the format spec parsing functions are
private. It would have required me reimplementing most of the parsing
logic just to know if the format char was correct.
This PR also doesn't reflect current Pylint functionality in two ways.
It supports new format strings correctly, Pylint as of now doesn't. See
pylint-dev/pylint#6085.
In case there are multiple adjacent string literals delimited by
whitespace the index of the wrong format char will relative to the
single string. Pylint will instead reported it relative to the
concatenated string.
Given this:
```
"%s" "%z" % ("hello", "world")
```
Ruff will report this:
```Unsupported format character 'z' (0x7a) at index 1```
Pylint instead:
```Unsupported format character 'z' (0x7a) at index 3```
I believe it's more sensible to report the index relative to the
individual string.
## Test Plan
Added new snapshot and a small test in
`crates/ruff_python_literal/src/format.rs`.
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
Part of #5062
Closes https://github.com/astral-sh/ruff/issues/5931
Implements formatting of a sequence of type parameters in a dedicated
struct for reuse by classes, functions, and type aliases (preparing for
#5929). Adds formatting of type parameters in class and function
definitions — previously, they were just elided.
## Summary
Builds on #6170 to break `global` and `nonlocal` statements, such that
we get:
```python
def f():
global \
analyze_featuremap_layer, \
analyze_featuremapcompression_layer, \
analyze_latencies_post, \
analyze_motions_layer, \
analyze_size_model
```
Instead of:
```python
def f():
global analyze_featuremap_layer, analyze_featuremapcompression_layer, analyze_latencies_post, analyze_motions_layer, analyze_size_model
```
Notably, we avoid applying this formatting if the statement ends in a
comment. Otherwise, the comment would _need_ to be placed after the last
item, like:
```python
def f():
global \
analyze_featuremap_layer, \
analyze_featuremapcompression_layer, \
analyze_latencies_post, \
analyze_motions_layer, \
analyze_size_model # noqa
```
To me, this seems wrong (and would break the `# noqa` comment). Ideally,
the items would be parenthesized, and the comment would be on the inner
parenthesis, like:
```python
def f():
global ( # noqa
analyze_featuremap_layer,
analyze_featuremapcompression_layer,
analyze_latencies_post,
analyze_motions_layer,
analyze_size_model
)
```
But that's not valid syntax.
## Summary
Checks for the presence of redundant `Literal` types and builtin super
types in an union. See [original
source](2a86db8271/pyi.py (L1261)).
This implementation has a couple of differences from the original. The
first one is, we support the `complex` and `float` builtin types. The
second is, when reporting diagnostic for a `Literal` with multiple
members of the same type, we print the entire `Literal` while `flak8`
only prints the `Literal` with its first member.
For example:
```python
from typing import Literal
x: Literal[1, 2] | int
```
Ruff will show `Literal[1, 2]` while flake8 only shows `Literal[1]`.
```shell
$ ruff crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:4:18: PYI051 `Literal["foo"]` is redundant in an union with `str`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:5:37: PYI051 `Literal[b"bar", b"foo"]` is redundant in an union with `bytes`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:6:37: PYI051 `Literal[5]` is redundant in an union with `int`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:6:67: PYI051 `Literal["foo"]` is redundant in an union with `str`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:7:37: PYI051 `Literal[b"str_bytes"]` is redundant in an union with `bytes`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:7:51: PYI051 `Literal[42]` is redundant in an union with `int`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:9:31: PYI051 `Literal[1J]` is redundant in an union with `complex`
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:9:53: PYI051 `Literal[3.14]` is redundant in an union with `float`
Found 8 errors.
```
```shell
$ flake8 crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:4:18: Y051 "Literal['foo']" is redundant in a union with "str"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:5:37: Y051 "Literal[b'bar']" is redundant in a union with "bytes"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:6:37: Y051 "Literal[5]" is redundant in a unionwith "int"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:6:67: Y051 "Literal['foo']" is redundant in a union with "str"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:7:37: Y051 "Literal[b'str_bytes']" is redundantin a union with "bytes"
crates/ruff/resources/test/fixtures/flake8_pyi/PYI051.pyi:7:51: Y051 "Literal[42]" is redundant in a union with "int"
```
While implementing this rule, I found a bug in the `is_unchecked_union`
check. This is the new check.
1ab86bad35/crates/ruff/src/checkers/ast/analyze/expression.rs (L85-L102)
The purpose of the check was to prevent rules from navigating through
nested `Union`s, as they already handle nested `Union`s. The way it was
implemented, this was not happening, the rules were getting executed
more than one time and sometimes were receiving expressions that were
not `Union`. For example, with the following code:
```python
typing.Union[Literal[5], int, typing.Union[Literal["foo"], str]]
```
The rules were receiving the expressions in the following order:
- `typing.Union[Literal[5], int, typing.Union[Literal["foo"], str]]`
- `Literal[5]`
- `typing.Union[Literal["foo"], str]]`
This was causing `PYI030` to report redundant information, for example:
```python
typing.Union[Literal[5], int, typing.Union[Literal["foo"],
Literal["bar"]]]
```
This is the `PYI030` output for this code:
```shell
PYI030 Multiple literal members in a union. Use a single literal, e.g. `Literal[5, "foo", "bar"]`
YI030 Multiple literal members in a union. Use a single literal, e.g.`Literal[5, "foo"]`
```
If I haven't misinterpreted the rule, that looks incorrect. I didn't
have the time to check the `PYI016` rule.
The last thing is, I couldn't find a reason for the "Why is this bad?"
section for `PYI051`.
Ref: #848
## Test Plan
Snapshots and manual runs of flake8.
\
## Summary
Previously, the ruff formatter was removing the star argument of
`lambda` expressions when formatting.
Given the following code snippet
```python
lambda *a: ()
lambda **b: ()
```
it would be formatted to
```python
lambda: ()
lambda: ()
```
We fix this by checking for the presence of `args`, `vararg` or `kwarg`
in the `lambda` expression, before we were only checking for the
presence of `args`.
Fixes#5894
## Test Plan
Add new tests cases.
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
## Summary
Similar to #6279, moving some helpers onto the struct in the name of
reducing the number of random undiscoverable utilities we have in
`helpers.rs`.
Most of the churn is migrating rules to take `ast::ExprCall` instead of
the spread call arguments.
## Test Plan
`cargo test`
## Summary
This PR removes a now-unnecessary abstraction from `helper.rs`
(`CallArguments`), in favor of adding methods to `Arguments` directly,
which helps with discoverability.
## Summary
This PR boxes the `TypeParams` and `Arguments` fields on the class
definition node. These fields are optional and often emitted, and given
that class definition is our largest enum variant, we pay the cost of
including them for every statement in the AST. Boxing these types
reduces the statement size by 40 bytes, which seems like a good tradeoff
given how infrequently these are accessed.
## Test Plan
Need to benchmark, but no behavior changes.
## Summary
This PR leverages the `Arguments` AST node introduced in #6259 in the
formatter, which ensures that we correctly handle trailing comments in
calls, like:
```python
f(
1,
# comment
)
pass
```
(Previously, this was treated as a leading comment on `pass`.)
This also allows us to unify the argument handling across calls and
class definitions.
## Test Plan
A bunch of new fixture tests, plus improved Black compatibility.
## Summary
Similar to #6259, this PR adds a `TypeParams` node to the AST, to
capture the list of type parameters with their surrounding brackets.
If a statement lacks type parameters, the `type_params` field will be
`None`.
## Summary
This PR adds a new `Arguments` AST node, which we can use for function
calls and class definitions.
The `Arguments` node spans from the left (open) to right (close)
parentheses inclusive.
In the case of classes, the `Arguments` is an option, to differentiate
between:
```python
# None
class C: ...
# Some, with empty vectors
class C(): ...
```
In this PR, we don't really leverage this change (except that a few
rules get much simpler, since we don't need to lex to find the start and
end ranges of the parentheses, e.g.,
`crates/ruff/src/rules/pyupgrade/rules/lru_cache_without_parameters.rs`,
`crates/ruff/src/rules/pyupgrade/rules/unnecessary_class_parentheses.rs`).
In future PRs, this will be especially helpful for the formatter, since
we can track comments enclosed on the node itself.
## Test Plan
`cargo test`
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Before:
<img width="1031" alt="Screen Shot 2023-08-02 at 15 57 10"
src="https://github.com/astral-sh/ruff/assets/17039389/171a21d5-01a5-4aa5-8079-4e7f8a59ade8">
After:
<img width="1031" alt="Screen Shot 2023-08-02 at 15 58 03"
src="https://github.com/astral-sh/ruff/assets/17039389/afd1b9b7-89e0-4e38-a4a6-e3255b62f021">
## Test Plan
<!-- How was it tested? -->
Manual inspection
## Summary
This PR renames...
- `Parameter#arg` to `Parameter#name`
- `ParameterWithDefault#def` to `ParameterWithDefault#parameter` (such
that `ParameterWithDefault` has a `default` and a `parameter`)
## Test Plan
`cargo test`
## Summary
This PR renames a few AST nodes for clarity:
- `Arguments` is now `Parameters`
- `Arg` is now `Parameter`
- `ArgWithDefault` is now `ParameterWithDefault`
For now, the attribute names that reference `Parameters` directly are
changed (e.g., on `StmtFunctionDef`), but the attributes on `Parameters`
itself are not (e.g., `vararg`). We may revisit that decision in the
future.
For context, the AST node formerly known as `Arguments` is used in
function definitions. Formally (outside of the Python context),
"arguments" typically refers to "the values passed to a function", while
"parameters" typically refers to "the variables used in a function
definition". E.g., if you Google "arguments vs parameters", you'll get
some explanation like:
> A parameter is a variable in a function definition. It is a
placeholder and hence does not have a concrete value. An argument is a
value passed during function invocation.
We're thus deviating from Python's nomenclature in favor of a scheme
that we find to be more precise.
## Summary
Black allows up to one blank line _before_ a class docstring, and
enforces one blank line _after_ a class docstring. This PR implements
that handling. The cases in
`crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/class_definition.py`
match Black identically.
## Summary
This PR ensures that if a function or class is the first statement in a
nested suite that _isn't_ a function or class body, we insert a leading
newline.
For example, given:
```python
def f():
if True:
def register_type():
pass
```
We _want_ to preserve the newline, whereas today, we remove it.
Note that this only applies when the function or class doesn't have any
leading comments.
Closes https://github.com/astral-sh/ruff/issues/6066.
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## Summary
This PR removes the `Interactive` and `FunctionType` parser modes that are unused by ruff
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo test`
<!-- How was it tested? -->
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## Summary
This PR removes the `type_comment` field which our parser doesn't support.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo test`
<!-- How was it tested? -->
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## Summary
This PR removes the type ignore node from the AST because our parser doesn't support it, and just having it around is confusing.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo build`
<!-- How was it tested? -->
**Summary** Allow passing any node to `CommentPlacement::{leading,
trailing, dangling}` without manually converting. Conversely, Restrict
the comment to the only type we actually pass.
**Test Plan** No changes.
## Summary
Previously, given:
```python
a = \
5;
```
When detecting continuations starting at the offset of the `;`, we'd
flag the previous line as a continuation. We should only flag a
continuation if there isn't leading content prior to the offset.
Closes https://github.com/astral-sh/ruff/issues/6214
## Summary
This PR moves the "insert empty lines" behavior out of
`JoinNodesBuilder` and into the `Suite` formatter. I find it a little
confusing that the logic is split between those two formatters right
now, and since this is _only_ used in that one place, IMO it is a bit
simpler to just inline it and use a single approach to tracking state
(right now, both are stateful).
The only other place this was used was for decorators. As a side effect,
we now remove blank lines in both of these cases, which is a known but
intentional deviation from Black (which preserves the empty line before
the comment in the first case):
```python
@foo
# Hello
@bar
def baz():
pass
@foo
@bar
def baz():
pass
```
## Summary
Very subtle bug related to the AST traversal. Given:
```python
from __future__ import annotations
from logging import getLogger
__all__ = ("getLogger",)
def foo() -> None:
pass
```
We end up visiting the `-> None` annotation, then reusing the state
snapshot when we go to visit the `__all__` exports, so when we visit
`"getLogger"`, we think we're inside of a deferred type annotation.
This PR changes all the deferred visitors to snapshot and restore the
state, which is a lot safer -- that way, the visitors avoid modifying
the current visitor state. (Previously, they implicitly left the visitor
state set to the state of the _last_ thing they visited.)
Closes https://github.com/astral-sh/ruff/issues/6207.
**Summary** This includes two changes:
* Allow setting `-v` in `ruff_dev`, using the `ruff_cli` implementation
* `debug!` which ruff configuration strategy was used
This is a byproduct of debugging #6187.
**Test Plan** n/a
**Summary** This prevents us from turning `r'''\""'''` into
`r"""\"""""`, which is invalid syntax.
This PR fixes CI, which is currently broken on main (in a way that still
passes on linter PRs and allows merging formatter PRs, but it's bad to
have a job be red). Once merged, i'll make the formatted ecosystem
checks a required check.
**Test Plan** Added a regression test.
## Summary
This PR adds a new precedence level for the comprehension element. This fixes
the generator to not add parentheses around the comprehension element every
time.
The new precedence level is `COMPREHENSION_ELEMENT` and it should occur after
the `NAMED_EXPR` precedence level because named expressions are always parenthesized.
This matches the behavior of Python `ast.unparse` and tested with the
following snippet:
```python
import ast
code = ""
ast.unparse(ast.parse(code))
```
## Test Plan
Add a bunch of test cases for all the valid nodes at that position.
fixes: #5777
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## Summary
Format bytes string
Closes#6064
## Test Plan
Added a fixture based on string's one
## Summary
We have some code to ensure that if an aliased import is used, any
submodules should be marked as used too. This comment says it best:
```rust
// If the name of a submodule import is the same as an alias of another import, and the
// alias is used, then the submodule import should be marked as used too.
//
// For example, mark `pyarrow.csv` as used in:
//
// ```python
// import pyarrow as pa
// import pyarrow.csv
// print(pa.csv.read_csv("test.csv"))
// ```
```
However, it looks like when we go to look up `pyarrow` (of `import
pyarrow as pa`), we aren't checking to ensure the resolved binding is
_actually_ an import. This was causing us to attribute `print(rm.ANY)`
to `def requests_mock` here:
```python
import requests_mock as rm
def requests_mock(requests_mock: rm.Mocker):
print(rm.ANY)
```
Closes https://github.com/astral-sh/ruff/issues/6180.
## Summary
Adds `global` and `nonlocal` formatting, without the "deviation from
black" outlined in the linked issue, which I'll do separately.
See: https://github.com/astral-sh/ruff/issues/4798.
## Test Plan
Added a fixture in the Ruff-specific directory since the Black fixtures
don't seem to cover this.
## Summary
Closes https://github.com/astral-sh/ruff/issues/5781
## Test Plan
Added cases to
`crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/named_expr.py`
one-by-one and adjusted the condition as needed.
## Summary
Right now, if we have two fixes that have an overlapping edit, but not
an _identical_ set of edits, they'll conflict, causing us to do another
linter traversal. Here, I've enabled the fixer to support partially
overlapping edits, which (as an example) let's us greatly reduce the
number of iterations required in the test suite.
The most common case here is that in which a bunch of edits need to
import some symbol, and then use that symbol, but in different ways. In
that case, all edits will have a common fix (to import the symbol), but
deviate in some way. With this change, we can do all of those edits in
one pass.
Note that the simplest way to enable this was to store sorted edits on
`Fix`. We don't allow modifying the edits on `Fix` once it's
constructed, so this is an easy change, and allows us to avoid a bunch
of clones and traversals later on.
Closes#5800.
## Summary
If a file has a BOM, the import sorter _always_ reports the imports as
unsorted. The acute issue is that we detect that the line has leading
content (before the imports), which we always consider a violation.
Rather than fixing that one site, this PR instead makes `.line_start`
BOM-aware.
Fixes https://github.com/astral-sh/ruff/issues/6155.
## Summary
This PR adds a new config option for `pep8-naming` plugin called
`extend-ignore-names` which is used to extend the default values in
`ignore-names` option.
resolves: #6050
## Summary
This PR protects against code like:
```python
from typing import Optional
import bar # ruff: noqa
import baz
class Foo:
x: Optional[str] = None
```
In which the user wrote `# ruff: noqa` to ignore a specific error, not
realizing that it was a file-level exemption that thus turned off all
lint rules.
Specifically, if a `# ruff: noqa` directive is not at the start of a
line, we now ignore it and warn, since this is almost certainly a
mistake.
Requires https://github.com/astral-sh/RustPython-Parser/pull/42
Related https://github.com/PyCQA/pyflakes/pull/778
[PEP-695](https://peps.python.org/pep-0695)
Part of #5062
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Adds a scope for type parameters, a type parameter binding kind, and
checker visitation of type parameters in type alias statements, function
definitions, and class definitions.
A few changes were necessary to ensure correctness following the
insertion of a new scope between function and class scopes and their
parent.
## Test Plan
<!-- How was it tested? -->
Undefined name snapshots.
Unused type parameter rule will be added as follow-up.
## Summary
Right now, `RUF015` will try to rewrite `x[:1]` as `[next(x)]`. This
isn't equivalent if `x`, for example, is empty, where slicing like
`x[:1]` is forgiving, but `next` raises `StopIteration`. For me this is
a little too much of a deviation to be comfortable with, and most of the
value in this rule is the `x[0]` to `next(x)` conversion anyway.
Closes https://github.com/astral-sh/ruff/issues/6148.
## Summary
In #6134 and #6136, we see some false positives for "shadowed" class
definitions. For example, here, the first definition is flagged as
unused, since from the perspective of the semantic model (which doesn't
understand branching), it appears to be immediately shadowed in the
`else`, and thus never used:
```python
if sys.version_info >= (3, 11):
class _RootLoggerConfiguration(TypedDict, total=False):
level: _Level
filters: Sequence[str | _FilterType]
handlers: Sequence[str]
else:
class _RootLoggerConfiguration(TypedDict, total=False):
level: _Level
filters: Sequence[str]
handlers: Sequence[str]
```
Instead of looking at _all_ bindings, we should instead look at the
"live" bindings, which is similar to how other rules (like unused
variables detection) is structured. We thus move the rule from
`bindings.rs` (which iterates over _all_ bindings, regardless of whether
they're shadowed) to `deferred_scopes.rs`, which iterates over all
"live" bindings once a scope has been fully analyzed.
## Test Plan
`cargo test`
## Summary
This PR implements pycodestyle's E241 (tab after comma) and E242
(multiple whitespace after comma) lints.
These are marked as nursery rules like many other pycodestyle rules.
Refs #2402
## Test Plan
E24.py copied from pycodestyle.
## Summary
Completes the documentation for the ruleset, apart from four rules which
have contradictions, so need to be thought about more regarding how to
document that. Related to #2646.
## Test Plan
`python scripts/test_docs_formatted.py`
**Summary**
Updated doc comments for `missing_whitespace_around_operator.rs`. Online
docs also benefit from this update.
**Test Plan**
Checked docs via
[mkdocs](389fe13c93/CONTRIBUTING.md?plain=1#L267-L296)
## Summary
Completes the documentation for the one and only (current) rule in the
`flynt` ruleset. Related to #2646.
## Test Plan
`python scripts/test_docs_formatted.py`
## Summary
This PR stores the mapping from `ExprName` node to resolved `BindingId`,
which lets us skip scope lookups in `resolve_call_path`. It's enabled by
#6045, since that PR ensures that when we analyze a node (and thus call
`resolve_call_path`), we'll have already visited its `ExprName`
elements.
In more detail: imagine that we're traversing over `foo.bar()`. When we
read `foo`, it will be an `ExprName`, which we'll then resolve to a
binding via `handle_node_load`. With this change, we then store that
binding in a map. Later, if we call `collect_call_path` on `foo.bar`,
we'll identify `foo` (the "head" of the attribute) and grab the resolved
binding in that map. _Almost_ all names are now resolved in advance,
though it's not a strict requirement, and some rules break that pattern
(e.g., if we're analyzing arguments, and they need to inspect their
annotations, which are visited in a deferred manner).
This improves performance by 4-6% on the all-rules benchmark. It looks
like it hurts performance (1-2% drop) in the default-rules benchmark,
presumedly because those rules don't call `resolve_call_path` nearly as
much, and so we're paying for these extra writes.
Here's the benchmark data:
```
linter/default-rules/numpy/globals.py
time: [67.270 µs 67.380 µs 67.489 µs]
thrpt: [43.720 MiB/s 43.792 MiB/s 43.863 MiB/s]
change:
time: [+0.4747% +0.7752% +1.0626%] (p = 0.00 < 0.05)
thrpt: [-1.0514% -0.7693% -0.4724%]
Change within noise threshold.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high severe
linter/default-rules/pydantic/types.py
time: [1.4067 ms 1.4105 ms 1.4146 ms]
thrpt: [18.028 MiB/s 18.081 MiB/s 18.129 MiB/s]
change:
time: [+1.3152% +1.6953% +2.0414%] (p = 0.00 < 0.05)
thrpt: [-2.0006% -1.6671% -1.2981%]
Performance has regressed.
linter/default-rules/numpy/ctypeslib.py
time: [637.67 µs 638.96 µs 640.28 µs]
thrpt: [26.006 MiB/s 26.060 MiB/s 26.113 MiB/s]
change:
time: [+1.5859% +1.8109% +2.0353%] (p = 0.00 < 0.05)
thrpt: [-1.9947% -1.7787% -1.5611%]
Performance has regressed.
linter/default-rules/large/dataset.py
time: [3.2289 ms 3.2336 ms 3.2383 ms]
thrpt: [12.563 MiB/s 12.581 MiB/s 12.599 MiB/s]
change:
time: [+0.8029% +0.9898% +1.1740%] (p = 0.00 < 0.05)
thrpt: [-1.1604% -0.9801% -0.7965%]
Change within noise threshold.
linter/all-rules/numpy/globals.py
time: [134.05 µs 134.15 µs 134.26 µs]
thrpt: [21.977 MiB/s 21.995 MiB/s 22.012 MiB/s]
change:
time: [-4.4571% -4.1175% -3.8268%] (p = 0.00 < 0.05)
thrpt: [+3.9791% +4.2943% +4.6651%]
Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
2 (2.00%) low mild
3 (3.00%) high mild
3 (3.00%) high severe
linter/all-rules/pydantic/types.py
time: [2.5627 ms 2.5669 ms 2.5720 ms]
thrpt: [9.9158 MiB/s 9.9354 MiB/s 9.9516 MiB/s]
change:
time: [-5.8304% -5.6374% -5.4452%] (p = 0.00 < 0.05)
thrpt: [+5.7587% +5.9742% +6.1914%]
Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
6 (6.00%) high mild
1 (1.00%) high severe
linter/all-rules/numpy/ctypeslib.py
time: [1.3949 ms 1.3956 ms 1.3964 ms]
thrpt: [11.925 MiB/s 11.931 MiB/s 11.937 MiB/s]
change:
time: [-6.2496% -6.0856% -5.9293%] (p = 0.00 < 0.05)
thrpt: [+6.3030% +6.4799% +6.6662%]
Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
3 (3.00%) high mild
4 (4.00%) high severe
linter/all-rules/large/dataset.py
time: [5.5951 ms 5.6019 ms 5.6093 ms]
thrpt: [7.2527 MiB/s 7.2623 MiB/s 7.2711 MiB/s]
change:
time: [-5.1781% -4.9783% -4.8070%] (p = 0.00 < 0.05)
thrpt: [+5.0497% +5.2391% +5.4608%]
Performance has improved.
```
Still playing with this (the concepts need better names, documentation,
etc.), but opening up for feedback.
## Summary
Noticed in #5954: we walk _past_ the root rather than stopping _at_ the
root when attempting to traverse along the parent path. It's effectively
an off-by-one bug.
## Summary
Updated doc comment for `call_datetime_without_tzinfo.rs`. Online docs
also benefit from this update.
## Test Plan
Checked docs via
[mkdocs](389fe13c93/CONTRIBUTING.md?plain=1#L267-L296)
## Summary
Check for unused private `TypeVar`. See [original
implementation](2a86db8271/pyi.py (L1958)).
```
$ flake8 --select Y018 crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi
crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:4:1: Y018 TypeVar "_T" is not used
crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:5:1: Y018 TypeVar "_P" is not used
```
```
$ ./target/debug/ruff --select PYI018 crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi --no-cache
crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:4:1: PYI018 TypeVar `_T` is never used
crates/ruff/resources/test/fixtures/flake8_pyi/PYI018.pyi:5:1: PYI018 TypeVar `_P` is never used
Found 2 errors.
```
In the file `unused_private_type_declaration.rs`, I'm planning to add
other rules that are similar to `PYI018` like the `PYI046`, `PYI047` and
`PYI049`.
ref #848
## Test Plan
Snapshots and manual runs of flake8.
## Summary
This is a rewrite of the main comment placement logic. `place_comment`
now has three parts:
- place own line comments
- between branches
- after a branch
- place end-of-line comments
- after colon
- after a branch
- place comments for specific nodes (that include module level comments)
The rewrite fixed three bugs: `class A: # trailing comment` comments now
stay end-of-line, `try: # comment` remains end-of-line and deeply
indented try-else-finally comments remain with the right nested
statement.
It will be much easier to give more alternative branches nodes since
this is abstracted away by `is_node_with_body` and the first/last child
helpers. Adding new node types can now be done by adding an entry to the
`place_comment` match. The code went from 1526 lines before #6033 to
1213 lines now.
It thinks it easier to just read the new `placement.rs` rather than
reviewing the diff.
## Test Plan
The existing fixtures staying the same or improving plus new ones for
the bug fixes.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
The `SIM102` auto-fix fails if `elif` is indented like this:
## Example
```python
def f():
# SIM102
if a:
pass
elif b:
if c:
d
```
```
> cargo run -p ruff_cli -- check --select SIM102 --fix a.py
...
error: Failed to fix nested if: Failed to extract statement from source
a.py:5:5: SIM102 Use a single `if` statement instead of nested `if` statements
Found 1 error.
```
## Test Plan
<!-- How was it tested? -->
New test
## Summary
This PR adds the implementation for the new Jupyter AST nodes i.e.,
`ExprLineMagic` and `StmtLineMagic`.
## Test Plan
Add test cases for `unparse` containing magic commands
resolves: #6087
## Summary
Updated doc comment for `tab_indentation.rs`. Online docs also benefit
from this update.
## Test Plan
Checked docs via
[mkdocs](389fe13c93/CONTRIBUTING.md?plain=1#L267-L296)
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Part of #5062
Requires https://github.com/astral-sh/RustPython-Parser/pull/32
Adds visitation of type alias statements and type parameters in class
and function definitions.
Duplicates tests for `PreorderVisitor` into `Visitor` with new
snapshots. Testing required node implementations for the `TypeParam`
enum, which is a chunk of the diff and the reason we need `Ranged`
implementations in
https://github.com/astral-sh/RustPython-Parser/pull/32.
## Test Plan
<!-- How was it tested? -->
Adds unit tests with snapshots.
Reimplements https://github.com/astral-sh/ruff/pull/3104
Closes https://github.com/astral-sh/ruff/issues/5726
Note that we will generate the hash for a cache key twice in normal
operation. Once to check for the cached item and again to update the
cache. We could optimize this by generating the hash once in
`diagnostics::lint_file` and passing the `u64` into `get` and `update`.
We'd probably want to wrap it in a `CacheKeyHash` enum for type safety.
## Test plan
Unit tests for Windows and Unix.
Manual test with case from issue
```
❯ touch fake.py
❯ chmod +x fake.py
❯ ./target/debug/ruff --select EXE fake.py
fake.py:1:1: EXE002 The file is executable but no shebang is present
Found 1 error.
❯ chmod -x fake.py
❯ ./target/debug/ruff --select EXE fake.py
```
## Summary
If a method is annotated with `@typing_extensions.override`, we should
avoid flagging A003 on it. This isn't part of the standard library yet,
but it's used to explicitly mark methods as overrides.
## Summary
If a user subclasses `threading.Event`, e.g. with:
```python
from threading import Event
class CustomEvent(Event):
def set(self) -> None:
...
```
They no control over the method name (`set`). This PR allows
`threading.Event#set` and `logging.Filter#filter` overrides, and avoids
flagging A003 in such cases. Ideally, we'd avoid flagging all overridden
methods, but... that's a lot more difficult, and this is at least
_better_ than what we do now.
Closes https://github.com/astral-sh/ruff/issues/6057.
Closes https://github.com/astral-sh/ruff/issues/5956.
## Summary
This PR modifies the order of operations in our AST checker. Previously,
we ran our analysis rules first, then bound names and traversed over the
subtrees. Now, after a series of refactors, we can invert the order: do
the subtree traversal and model-building _first_, then run rules.
The nice thing about this change is that when we go to analyze, e.g., a
function call node, we'll already have traversed any of the constituent
`Expr::Name` nodes... So if we store the resolution of all names when do
the traversal, we can avoid having to do any expensive work in
`resolve_call_path`.
## Test Plan
Clean run of the snapshot tests, and hopefully the ecosystem checks too!
## Summary
This PR is a refactoring of placement.rs. The code got more consistent,
some comments were updated and some dead code was removed or replaced
with debug assertions. It also contains a bugfix for the placement of
end-of-branch comments with nested bodies inside try statements that
occurred when refactoring the nested body loop.
## Test Plan
The existing test cases don't change. I added a couple of cases that i
think should be tested but weren't, and a regression test for the bugfix
## Summary
This PR ensures that we can retain the current behavior even after we
reorder the visitor a bit, by looking for annotated lambdas rather than
"is the name bound to anything?", since if we visit the name before we
run this rule, it'll _always_ be bound. (This check is already a bit
flawed -- in truth, we should probably run this rule deferred so that we
can reliably detect shadowing.)
## Summary
This PR attempts to draw some basic separation between the `Checker`'s
traversal responsibilities (traversing the AST, building the semantic
model) and its calling-out-to-lint-rule responsibilities. It doesn't try
to introduce any sophisticated API. Instead, it just moves all of the
lint rule calls out of `checkers/ast/mod.rs` and into methods in a new
`analyze` module. (There are four remaining lint rules in `Checker`, but
I'll remove those in future PRs.)
I'm not trying to "solve" our lint rule API here. Instead, I'm trying to
make two improvements:
1. `checkers/ast/mod.rs` has just gotten way too large, and people work
in it all the time. Prior to this PR, it was 5.5k lines, which led to
significant lags in my editor and made it really hard to reason about
the parts that are _actually_ important. (I like big files, but this one
crossed the line for me.) Now, it's < 2,000 lines, and the code is much
more focused.
2. I want to avoid accidentally adding lint rules in the "wrong" parts
of the traversal. By confining lint rule invocations to these "analyze"
calls, we'll avoid (e.g.) putting them in the binding phase.
## Summary
These only need the token stream, and we always prefer token-based to
physical line-based rules.
There are a few other changes snuck in here:
- Renaming the rule files to match the diagnostic names (likely an
error).
- The "leading whitespace before shebang" rule now works regardless of
where the comment occurs (i.e., if the shebang is on the second line,
and the first line is blank, we flag and remove that leading
whitespace).
**Summary** Fix an instability in with statement formatter when there is
an own line comment as the `as`
```python
with (
a as
# bad comment
b):
```
**Test Plan** Added the comment to the test cases.
## Summary
Closes https://github.com/astral-sh/ruff/issues/6025 (which contains a
more thorough description of the issue). Previously, the `# noqa` here
was being marked as unused, but removing it raised `SIM114`:
```python
def foo():
a = True
b = False
if a > b: # noqa: SIM114
return 3
elif a == b:
return 3
```
**Summary** Add a formatter progress testing script to CI. This script
will 1) print the black compability on each run 2) catch regressions wrt
to formatter stability, emitting invalid syntax and other kinds of bugs
(e.g. #5917) before they land on main 3) have an additional layer of
real world tests when implementing new nodes or other new formatter
code.
This is currently a bash script, i'm not sure if we want to keep it that
way, or switch to e.g. the regular ecosystem scripts. The output
separation of `format_dev` could also use some polishing. We should also
consider pinning commits so we don't get spurious regression when they
change their code.
**Test Plan** The script extends CI.
## Summary
My intuition is that it's faster to do these checks as-needed rather
than allocation new hash maps and vectors for the arguments. (We
typically only query once anyway.)
## Summary
This PR adds a `logger-objects` setting that allows users to mark
specific symbols a `logging.Logger` objects. Currently, if a `logger` is
imported, we only flagged it as a `logging.Logger` if it comes exactly
from the `logging` module or is `flask.current_app.logger`.
This PR allows users to mark specific loggers, like
`logging_setup.logger`, to ensure that they're covered by the
`flake8-logging-format` rules and others.
For example, if you have a module `logging_setup.py` with the following
contents:
```python
import logging
logger = logging.getLogger(__name__)
```
Adding `"logging_setup.logger"` to `logger-objects` will ensure that
`logging_setup.logger` is treated as a `logging.Logger` object when
imported from other modules (e.g., `from logging_setup import logger`).
Closes https://github.com/astral-sh/ruff/issues/5694.
I don't know whether we want to make this change but here's some data...
Binary size:
- `main`: 30,384
- `charlie/match-phf`: 30,416
llvm-lines:
- `main`: 1,784,148
- `charlie/match-phf`: 1,789,877
llvm-lines and binary size are both unchanged (or, by < 5) when moving
from `u8` to `u32` return types, and even when moving to `char` keys and
values. I didn't expect this, but I'm not very knowledgable on this
topic.
Performance:
```
Confusables/match/src time: [4.9102 µs 4.9352 µs 4.9777 µs]
change: [+1.7469% +2.2421% +2.8710%] (p = 0.00 < 0.05)
Performance has regressed.
Found 12 outliers among 100 measurements (12.00%)
2 (2.00%) low mild
4 (4.00%) high mild
6 (6.00%) high severe
Confusables/match-with-skip/src
time: [2.0676 µs 2.0945 µs 2.1317 µs]
change: [+0.9384% +1.6000% +2.3920%] (p = 0.00 < 0.05)
Change within noise threshold.
Found 8 outliers among 100 measurements (8.00%)
3 (3.00%) high mild
5 (5.00%) high severe
Confusables/phf/src time: [31.087 µs 31.188 µs 31.305 µs]
change: [+1.9262% +2.2188% +2.5496%] (p = 0.00 < 0.05)
Performance has regressed.
Found 15 outliers among 100 measurements (15.00%)
3 (3.00%) low mild
6 (6.00%) high mild
6 (6.00%) high severe
Confusables/phf-with-skip/src
time: [2.0470 µs 2.0486 µs 2.0502 µs]
change: [-0.3093% -0.1446% +0.0106%] (p = 0.08 > 0.05)
No change in performance detected.
Found 4 outliers among 100 measurements (4.00%)
2 (2.00%) high mild
2 (2.00%) high severe
```
The `-with-skip` variants add our optimization which first checks
whether the character is ASCII. So `match` is way, way faster than PHF,
but it tends not to matter since almost all source code is ASCII anyway.
## Summary
This pull request add supports for `int`, `float` and `bool` types in
`UP018`
rule to convert empty call to the default value of the type or remove
the call
if a value of the same type is provided as an argument.
## Test Plan
Added tests for `int`, `float` and `bool` types.
Partially resolves#5988
**Summary** Add a `EmptyWithDanglingComments` format helper that formats
comments inside empty parentheses, brackets or curly braces. Previously,
this was implemented separately, and partially incorrectly, for each use
case.
Empty `()`, `[]` and `{}` are special because there can be dangling
comments, and they can be in
two positions:
```python
x = [ # end-of-line
# own line
]
```
These comments are dangling because they can't be assigned to any
element inside as they would
in all other cases.
**Test Plan** Added a regression test.
145 (from previously 149) instances of unstable formatting remaining.
```
$ cargo run --bin ruff_dev --release -- format-dev --stability-check --error-file formatter-ecosystem-errors.txt --multi-project target/checkouts > formatter-ecosystem-progress.txt
$ rg "Unstable formatting" target/formatter-ecosystem-errors.txt | wc -l
145
```
## Summary
This is equivalent for a single flag, but I think it's more likely to be
correct when the bitflags are modified -- the primary reason being that
we sometimes define flags as the union of other flags, e.g.:
```rust
const ANNOTATION = Self::TYPING_ONLY_ANNOTATION.bits() | Self::RUNTIME_ANNOTATION.bits();
```
In this case, `flags.contains(Flag::ANNOTATION)` requires that _both_
flags in the union are set, whereas `flags.intersects(Flag::ANNOTATION)`
requires that _at least one_ flag is set.
## Summary
Use the `find_keyword` helper function instead of reimplementing it.
Follows on from #5983 by doing a different search.
## Test Plan
`cargo test`
## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
F507 should not be raised when the right-hand side value is a non-tuple
object.
```python
'%s' % (1, 2, 3) # throws
'%s' % [1, 2, 3] # doesn't throw
'%s' % {1, 2, 3} # doesn't throw
```
## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fix a regression introduced by
https://github.com/astral-sh/ruff/pull/5638. A multiline expression
can't be safely inserted into a format field.
### Example
```
> cat a.py
"{}".format(
[
1,
2,
3,
]
)
> cargo run -p ruff_cli -- check a.py --no-cache --select UP032 --fix
Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Running `target/debug/ruff check a.py --no-cache --select UP032 --fix`
error: Autofix introduced a syntax error in `a.py` with rule codes UP032: EOL while scanning string literal at byte offset 5
---
f"{[
1,
2,
3,
]}"
---
a.py:1:1: UP032 Use f-string instead of `format` call
Found 1 error.
```
## Test Plan
New test cases
## Summary
Checks that `append`, `extend` and `remove` methods are not called on
`__all__`. See [original
implementation](2a86db8271/pyi.py (L1133-L1138)).
```
$ flake8 --select Y026 crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi
crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi:3:1: Y056 Calling ".append()" on "__all__" may not be supported by all type checkers (use += instead)
crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi:4:1: Y056 Calling ".extend()" on "__all__" may not be supported by all type checkers (use += instead)
crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi:5:1: Y056 Calling ".remove()" on "__all__" may not be supported by all type checkers (use += instead)
```
```
$ ./target/debug/ruff --select PYI026 crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi --no-cache
crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi:3:1: PYI056 Calling ".append()" on "__all__" may not be supported by all type checkers (use += instead)
crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi:4:1: PYI056 Calling ".extend()" on "__all__" may not be supported by all type checkers (use += instead)
crates/ruff/resources/test/fixtures/flake8_pyi/PYI056.pyi:5:1: PYI056 Calling ".remove()" on "__all__" may not be supported by all type checkers (use += instead)
Found 3 errors.
```
ref #848
## Test Plan
Snapshots and manual runs of flake8.
## Summary
These are skipped as an optimization, but it feels kind of unnecessary
and makes the code a bit more confusing than is worthwhile.
(non-`strict` is also by far the more popular setting, and the default.)
## Summary
I ran into this in the wild. It looks like Ruff will collapse the `else`
and `elif` branches here (i.e., it doesn't recognize that they're too
independent import blocks):
```python
if "sdist" in cmds:
_sdist = cmds["sdist"]
elif "setuptools" in sys.modules:
from setuptools.command.sdist import sdist as _sdist
else:
from setuptools.command.sdist import sdist as _sdist
from distutils.command.sdist import sdist as _sdist
```
Likely fallout from the `elif_else_branches` refactor.
**Summary** Fix implemented in
https://github.com/astral-sh/RustPython-Parser/pull/35: Previously,
empty lambda arguments (e.g. `lambda: 1`) would get the range of the
entire expression, which leads to incorrect comment placement. Now empty
lambda arguments get an empty range between the `lambda` and the `:`
tokens.
**Test Plan** Added a regression test.
149 instances of unstable formatting remaining.
```
$ cargo run --bin ruff_dev --release -- format-dev --stability-check --error-file formatter-ecosystem-errors.txt --multi-project target/checkouts > formatter-ecosystem-progress.txt
$ rg "Unstable formatting" target/formatter-ecosystem-errors.txt | wc -l
149
```
**Summary** Add script to shrink all formatter errors: This started as a
fun idea and turned out really useful: This script gives us a single
Python file with all formatter stability errors. I want to keep it
around to occasionally update #5828 so I added it to the git.
**Test Plan** None, this is a helper script
## Summary
**Don't minimize files that don't match in the first place** This adds a
sanity check to the minimizer script that the
input matches the condition (e.g. unstable formatting). Otherwise we run
through all checks with the whole file, which is extremely slow. It's
more reasonable for downstream usage to write an empty string to the
output file instead.
## Summary
Allow `respect_gitignore` even when not in a git repo
## Test Plan
Within the Ruff repository:
1. Renamed `.git` to `.hello-world`
2. Added `test.py` in root folder
3. Added `test.py` to `.gitignore`
4. Ran `cargo run --bin ruff -- check --no-cache --isolated --show-files
.` with
and without `--respect-gitignore` flag
fixes: #5930
## Summary
We now allow RUF015 to fix cases like:
```python
list(range(10))[0]
list(x.y)[0]
list(x["y"])[0]
```
Further, we fix generators like:
```python
[i + 1 for i in x][0]
```
By rewriting to `next(iter(i + 1 for i in x))`.
I've retained the special-case that rewrites `[i for i in x][0]` to
`next(iter(x))`.
Closes https://github.com/astral-sh/ruff/issues/5764.
## 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">
## Summary
Before:
```
» ruff litestar tests --fix
warning: Invalid `# noqa` directive on line 19: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on line 65: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on line 74: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on line 22: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on line 66: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on line 75: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
```
After:
```
» cargo run --bin ruff ../litestar/litestar ../litestar/tests
Finished dev [unoptimized + debuginfo] target(s) in 0.15s
Running `target/debug/ruff ../litestar/litestar ../litestar/tests`
warning: Detected debug build without --no-cache.
warning: Invalid `# noqa` directive on /Users/sobolev/Desktop/litestar/tests/unit/test_contrib/test_sqlalchemy/models_bigint.py:19: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on /Users/sobolev/Desktop/litestar/tests/unit/test_contrib/test_sqlalchemy/models_bigint.py:65: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on /Users/sobolev/Desktop/litestar/tests/unit/test_contrib/test_sqlalchemy/models_bigint.py:74: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on /Users/sobolev/Desktop/litestar/tests/unit/test_contrib/test_sqlalchemy/models_uuid.py:22: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on /Users/sobolev/Desktop/litestar/tests/unit/test_contrib/test_sqlalchemy/models_uuid.py:66: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
warning: Invalid `# noqa` directive on /Users/sobolev/Desktop/litestar/tests/unit/test_contrib/test_sqlalchemy/models_uuid.py:75: expected a comma-separated list of codes (e.g., `# noqa: F401, F841`).
```
## Test Plan
I didn't find any existing tests with this warning.
Closes https://github.com/astral-sh/ruff/issues/5855
## Summary
Previously, `StmtIf` was defined recursively as
```rust
pub struct StmtIf {
pub range: TextRange,
pub test: Box<Expr>,
pub body: Vec<Stmt>,
pub orelse: Vec<Stmt>,
}
```
Every `elif` was represented as an `orelse` with a single `StmtIf`. This
means that this representation couldn't differentiate between
```python
if cond1:
x = 1
else:
if cond2:
x = 2
```
and
```python
if cond1:
x = 1
elif cond2:
x = 2
```
It also makes many checks harder than they need to be because we have to
recurse just to iterate over an entire if-elif-else and because we're
lacking nodes and ranges on the `elif` and `else` branches.
We change the representation to a flat
```rust
pub struct StmtIf {
pub range: TextRange,
pub test: Box<Expr>,
pub body: Vec<Stmt>,
pub elif_else_clauses: Vec<ElifElseClause>,
}
pub struct ElifElseClause {
pub range: TextRange,
pub test: Option<Expr>,
pub body: Vec<Stmt>,
}
```
where `test: Some(_)` represents an `elif` and `test: None` an else.
This representation is different tradeoff, e.g. we need to allocate the
`Vec<ElifElseClause>`, the `elif`s are now different than the `if`s
(which matters in rules where want to check both `if`s and `elif`s) and
the type system doesn't guarantee that the `test: None` else is actually
last. We're also now a bit more inconsistent since all other `else`,
those from `for`, `while` and `try`, still don't have nodes. With the
new representation some things became easier, e.g. finding the `elif`
token (we can use the start of the `ElifElseClause`) and formatting
comments for if-elif-else (no more dangling comments splitting, we only
have to insert the dangling comment after the colon manually and set
`leading_alternate_branch_comments`, everything else is taken of by
having nodes for each branch and the usual placement.rs fixups).
## Merge Plan
This PR requires coordination between the parser repo and the main ruff
repo. I've split the ruff part, into two stacked PRs which have to be
merged together (only the second one fixes all tests), the first for the
formatter to be reviewed by @michareiser and the second for the linter
to be reviewed by @charliermarsh.
* MH: Review and merge
https://github.com/astral-sh/RustPython-Parser/pull/20
* MH: Review and merge or move later in stack
https://github.com/astral-sh/RustPython-Parser/pull/21
* MH: Review and approve
https://github.com/astral-sh/RustPython-Parser/pull/22
* MH: Review and approve formatter PR
https://github.com/astral-sh/ruff/pull/5459
* CM: Review and approve linter PR
https://github.com/astral-sh/ruff/pull/5460
* Merge linter PR in formatter PR, fix ecosystem checks (ecosystem
checks can't run on the formatter PR and won't run on the linter PR, so
we need to merge them first)
* Merge https://github.com/astral-sh/RustPython-Parser/pull/22
* Create tag in the parser, update linter+formatter PR
* Merge linter+formatter PR https://github.com/astral-sh/ruff/pull/5459
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
## Summary
Originally `join_with` was used in the formatters README.md. Now it uses
```rs
f.join_comma_separated(item.end())
.nodes(elts.iter())
.finish()
```
## Test Plan
None
## Summary
For formatter instabilities, the message we get look something like
this:
```text
Unstable formatting /home/konsti/ruff/target/checkouts/deepmodeling:dpdispatcher/dpdispatcher/slurm.py
@@ -47,9 +47,9 @@
- script_header_dict["slurm_partition_line"] = (
- NOT_YET_IMPLEMENTED_ExprJoinedStr
- )
+ script_header_dict[
+ "slurm_partition_line"
+ ] = NOT_YET_IMPLEMENTED_ExprJoinedStr
Unstable formatting /home/konsti/ruff/target/checkouts/deepmodeling:dpdispatcher/dpdispatcher/pbs.py
@@ -26,9 +26,9 @@
- pbs_script_header_dict["select_node_line"] += (
- NOT_YET_IMPLEMENTED_ExprJoinedStr
- )
+ pbs_script_header_dict[
+ "select_node_line"
+ ] += NOT_YET_IMPLEMENTED_ExprJoinedStr
```
For ruff crashes. you don't even get that but just the file that crashed
it. To extract the actual bug, you'd need to manually remove parts of
the file, rerun to see if the bug still occurs (and revert if it
doesn't) until you have a minimal example.
With this script, you run
```shell
cargo run --bin ruff_shrinking -- target/checkouts/deepmodeling:dpdispatcher/dpdispatcher/slurm.py target/minirepo/code.py "Unstable formatting" "target/debug/ruff_dev format-dev --stability-check target/minirepo"
```
and get
```python
class Slurm():
def gen_script_header(self, job):
if resources.queue_name != "":
script_header_dict["slurm_partition_line"] = f"#SBATCH --partition {resources.queue_name}"
```
which is an nice minimal example.
I've been using this script and it would be easier for me if this were
part of main. The main disadvantage to merging is that it adds
additional dependencies.
## Test Plan
I've been using this for a number of minimization. This is an internal
helper script you only run manually. I could add a test that minimizes a
rule violation if required.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#5739
## Test Plan
<!-- How was it tested? -->
Manually tested:
```sh
$ tree dir
dir
├── dir.py
│ └── file.py
└── file.py
1 directory, 2 files
$ cargo run -p ruff_cli -- check dir --no-cache
Finished dev [unoptimized + debuginfo] target(s) in 0.08s
Running `target/debug/ruff check dir --no-cache`
dir/dir.py/file.py:1:7: F821 Undefined name `a`
dir/file.py:1:7: F821 Undefined name `a`
Found 2 errors.
```
Is a unit test needed?
## Summary
This PR does some non-behavior-changing refactoring of the AST checker.
Specifically, it breaks the `Stmt`, `Expr`, and `ExceptHandler` visitors
into four distinct, consistent phases:
1. **Phase 1: Analysis**: Run any lint rules on the node.
2. **Phase 2: Binding**: Bind any symbols declared by the node.
3. **Phase 3: Recursion**: Visit all child nodes.
4. **Phase 4: Clean-up**: Pop scopes, etc.
There are some fuzzy boundaries in the last three phases, but the most
important divide is between the Phase 1 and all the others -- the goal
here is (as much as possible) to disentangle all of the vanilla
lint-rule calls from any other semantic analysis or model building.
Part of the motivation here is that I'm considering re-ordering some of
these phases, and it was just impossible to reason about that change as
long as we had miscellaneous binding-creation and scope-modification
code intermingled with lint rules. However, this could also enable us to
(e.g.) move the entire analysis phase elsewhere, and even with a more
limited API that has read-only access to `Checker` (but can push to a
diagnostics vector).
## Summary
Comparing repos with black requires that we use the settings as black,
notably line length and magic trailing comma behaviour. Excludes and
preserving quotes (vs. a preference for either quote style) is not yet
implemented because they weren't needed for the test projects.
In the other two commits i fixed the output when the progress bar is
hidden (this way is recommonded in the indicatif docs), added a
`scratch.pyi` file to gitignore because black formats stub files
differently and also updated the ecosystem readme with the projects json
without forks.
## Test Plan
I added a `line-length` vs `line_length` test. Otherwise only my
personal usage atm, a PR to integrate the script into the CI to check
some projects will follow.
## Summary
Closes#5628 by only emitting if `sep=","`. Includes documentation
(completes the `pandas-vet` ruleset).
Related to #2646.
## Test Plan
`cargo test`
Moves the computation of the `start_offset` for overlong lines to just
before the result is returned. There is a slight overhead for overlong
lines (double the work for the first `limit` characters).
In practice this results in a speedup on the CPython codebase. Most
lines are not overlong, or are not enforced because the line ends with a
URL, or does not contain whitespace. Nonetheless, the 0.3% of overlong
lines are a lot compared to other violations.
### Before
_Selected W505 and E501_
_All rules_
### After
_Selected W505 and E501_
_All rules_
CPython line statistics:
- Number of Python lines: 867.696
- Number of overlong lines: 2.963 (0.3%)
<details>
Benchmark selected:
```shell
cargo build --release && hyperfine --warmup 10 --min-runs 50 \
"./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache -e --select W505,E501"
```
Benchmark all:
```shell
cargo build --release && hyperfine --warmup 10 --min-runs 50 \
"./target/release/ruff ./crates/ruff/resources/test/cpython/ --no-cache -e --select ALL"
```
Overlong lines in CPython
```shell
cargo run -p ruff_cli -- check crates/ruff/resources/test/cpython/Lib --no-cache --select=E501,W505 --statistics
```
Total Python lines:
```shell
find crates/ruff/resources/test/cpython/ -name '*.py' | xargs wc -l
```
</details>
(Performance tested on Mac M1)
## Summary
The motivating change here is to remove `let range =
except_handler.try_identifier().unwrap();` and instead just do
`name.range()`, since exception names now have ranges attached to them
by the parse. This also required some refactors (which are improvements)
to the built-in attribute shadowing rules, since at least one invocation
relied on passing in the exception handler and calling
`.try_identifier()`. Now that we have easy access to identifiers, we can
remove the whole `AnyShadowing` abstraction.
## Summary
This is more similar to how these flags work in other contexts (e.g.,
`visit_annotation`), and also ensures that we unset it prior to visit
the `orelse` and `finalbody` (a subtle bug).
## Summary
The intent of this rule is to always flag the `global` declaration, not
the usage. The current implementation does the wrong thing if a global
is assigned multiple times. Using `semantic().global()` is also more
efficient.
## Summary
Adds autofix for `hasattr` case of B004. I don't think it's safe (or
simple) to implement it for the `getattr` case because, inter alia,
calling `getattr` may have side effects.
Fixes#3545
## Test Plan
Existing tests were sufficient. Updated snapshots
## Summary
I'm doing some unrelated profiling, and I noticed that this method is
actually measurable on the CPython benchmark -- it's > 1% of execution
time. We don't need to lex here, we already know the ranges of all
comments, so we can just do a simple binary search for overlap, which
brings the method down to 0%.
## Test Plan
`cargo test`
## Summary
When required-imports is set with the syntax from ... import ... as ...,
autofix I002 is failing
## Test Plan
Reuse the same python files as
`crates/ruff/src/rules/isort/mod.rs:required_import` test.
## Summary
Previously, the `quoted-annotation` rule only removed quotes when `from
__future__ import annotations` was present. However, there are some
other cases in which this is also safe -- for example:
```python
def foo():
x: "MyClass"
```
We already model these in the semantic model, so this PR just expands
the scope of the rule to handle those.
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## Summary
This PR uses the `join_comma_separated` builder for formatting set
expressions
to ensure the formatting preserves magic commas, if the setting is
enabled.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
See the fixed black tests
<!-- How was it tested? -->
## Summary
Format `DictComp` like `ListComp` from #5600. It's not 100%, but I
figured maybe it's worth starting to explore.
## Test Plan
Added ruff fixture based on `ListComp`'s.
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## Summary
This PR improves the parentheses handling for with items to get closer
to black's formatting.
### Case 1:
```python
# Black / Input
with (
[
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"bbbbbbbbbb",
"cccccccccccccccccccccccccccccccccccccccccc",
dddddddddddddddddddddddddddddddd,
] as example1,
aaaaaaaaaaaaaaaaaaaaaaaaaa
+ bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+ cccccccccccccccccccccccccccc
+ ddddddddddddddddd as example2,
CtxManager2() as example2,
CtxManager2() as example2,
CtxManager2() as example2,
):
...
# Before
with (
[
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"bbbbbbbbbb",
"cccccccccccccccccccccccccccccccccccccccccc",
dddddddddddddddddddddddddddddddd,
] as example1,
(
aaaaaaaaaaaaaaaaaaaaaaaaaa
+ bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+ cccccccccccccccccccccccccccc
+ ddddddddddddddddd
) as example2,
CtxManager2() as example2,
CtxManager2() as example2,
CtxManager2() as example2,
):
...
```
Notice how Ruff wraps the binary expression in an extra set of
parentheses
### Case 2:
Black does not expand the with-items if the with has no parentheses:
```python
# Black / Input
with aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as c:
...
# Before
with (
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb as c
):
...
```
Or
```python
# Black / Input
with [
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"bbbbbbbbbb",
"cccccccccccccccccccccccccccccccccccccccccc",
dddddddddddddddddddddddddddddddd,
] as example1, aaaaaaaaaaaaaaaaaaaaaaaaaa * bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb * cccccccccccccccccccccccccccc + ddddddddddddddddd as example2, CtxManager222222222222222() as example2:
...
# Before (Same as Case 1)
with (
[
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"bbbbbbbbbb",
"cccccccccccccccccccccccccccccccccccccccccc",
dddddddddddddddddddddddddddddddd,
] as example1,
(
aaaaaaaaaaaaaaaaaaaaaaaaaa
* bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
* cccccccccccccccccccccccccccc
+ ddddddddddddddddd
) as example2,
CtxManager222222222222222() as example2,
):
...
```
## Test Plan
I added new snapshot tests
Improves the django similarity index from 0.973 to 0.977
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## Summary
Format `SetComp` like `ListComp`.
## Test Plan
Derived from `ListComp`'s fixture.
## Summary
`B006` should allow using `bytes(...)` as an argument defaule value.
## Test Plan
A new test case
---------
Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>
## Summary
Non-behavioral change, but this is the same in each branch. Visiting the
`func` first also means we've visited the `func` by the time we try to
resolve it (via `resolve_call_path`), which should be helpful in a
future refactor.
## Summary
The AST pass is broken up into three phases: pre-visit (which includes
analysis), recurse (visit all members), and post-visit (clean-up). We're
not supposed to edit semantic model flags in the pre-visit phase, but it
looks like we were for literal detection. This didn't matter in
practice, but I'm looking into some AST refactors for which this _does_
cause issues.
No behavior changes expected.
## Test Plan
Good test coverage on these.
## Summary
`PERF102` looks for unused keys or values in `dict.items()` calls, and
suggests instead using `dict.keys()` or `dict.values()`. Previously,
this check determined usage by looking for underscore-prefixed
variables. However, we can use the semantic model to actually detect
whether a variable is used. This has two nice effects:
1. We avoid odd false-positives whereby underscore-prefixed variables
are actually used.
2. We can catch more cases (fewer false-negatives) by detecting unused
loop variables that _aren't_ underscore-prefixed.
Closes#5692.
## Summary
Nested calls to `sorted` can only be collapsed if the calls are
identical (i.e., they have the exact same keyword arguments).
Update C414 to only flag such cases.
Fixes#5712
## Test Plan
Updated snapshots.
Tested against flake8-comprehensions. It incorrectly flags these cases.
## Summary
This is really bad PR hygiene, but a mix of: using `Locator`-based fixes
in a few places (in lieu of `Generator`-based fixes), using match syntax
to avoid `.len() == 1` checks, using common helpers in more places, etc.
## Test Plan
`cargo test`
## Summary
Consider single element subscript expr for implicit optional.
On `main`, the cases where there is only a single element in the
subscript
list was giving false positives such as for the following:
```python
typing.Union[None]
typing.Literal[None]
```
## Test Plan
`cargo test`
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
## Summary
Check for `Any` in other types for `ANN401`. This reuses the logic from
`implicit-optional` rule to resolve the type to `Any`.
Following types are supported:
* `Union[Any, ...]`
* `Any | ...`
* `Optional[Any]`
* `Annotated[<any of the above variant>, ...]`
* Forward references i.e., `"Any | ..."`
## Test Plan
Added test cases for various combinations.
fixes: #5458
## Summary
Do not raise `EXE001` and `EXE002` if WSL is detected. Uses the
[`wsl`](https://crates.io/crates/wsl) crate.
Closes#5445.
## Test Plan
`cargo test`
I don't use Windows, so was unable to test on a WSL environment. It
would be good if someone who runs Windows could check the functionality.
## Summary
Python doesn't allow `"Foo" | None` if the annotation will be evaluated
at runtime (see the comments in the PR, or the semantic model
documentation for more on what this means and when it is true), but it
_does_ allow it if the annotation is typing-only.
This, for example, is invalid, as Python will evaluate `"Foo" | None` at
runtime in order to
populate the function's `__annotations__`:
```python
def f(x: "Foo" | None): ...
```
This, however, is valid:
```python
def f():
x: "Foo" | None
```
As is this:
```python
from __future__ import annotations
def f(x: "Foo" | None): ...
```
Closes#5706.
## Summary
`StmtAnnAssign` would not insert parentheses when breaking the same way
`StmtAssign` does, causing unstable formatting and likely some syntax
errors.
## Test Plan
I added a regression test.
## Summary
The previous dummy was causing instabilities since it turned a string
into a variable.
E.g.
```python
script_header_dict[
"slurm_partition_line"
] = f"#SBATCH --partition {resources.queue_name}"
```
has an instability as
```python
- script_header_dict["slurm_partition_line"] = (
- NOT_YET_IMPLEMENTED_ExprJoinedStr
- )
+ script_header_dict[
+ "slurm_partition_line"
+ ] = NOT_YET_IMPLEMENTED_ExprJoinedStr
```
## Test Plan
The instability is gone, otherwise it's still a dummy
## Summary
Implement Pylint rule [`consider-using-in`
(`R1714`)](https://pylint.pycqa.org/en/latest/user_guide/messages/refactor/consider-using-in.html)
as `repeated-equality-comparison-target` (`PLR1714`). This rule checks
for expressions that can be re-written as a membership test for better
readability and performance.
For example,
```python
foo == "bar" or foo == "baz" or foo == "qux"
```
should be rewritten as
```python
foo in {"bar", "baz", "qux"}
```
Related to #970. Includes documentation.
### Implementation quirks
The implementation does not work with Yoda conditions (e.g., `"a" ==
foo` instead of `foo == "a"`). The Pylint version does. I couldn't find
a way of supporting Yoda-style conditions without it being inefficient,
so didn't (I don't think people write Yoda conditions any way).
## Test Plan
Added fixture.
`cargo test`
## Summary
We have two `Cursor` implementations. This PR moves the implementation
from the formatter into `ruff_python_whitespace` (kind of a poorly-named
crate now) and uses it for both use-cases.
## Summary
Document all `ruff_dev` subcommands and document the `format_dev` flags
in the formatter readme.
CC @zanieb please flag everything that isn't clear or missing
## Test Plan
n/a
Detects invalid types for tuple, list, bytes, string indices.
For example, the following will raise a `TypeError` at runtime and when
imported Python will display a `SyntaxWarning`
```python
var = [1, 2, 3]["x"]
```
```
example.py:1: SyntaxWarning: list indices must be integers or slices, not str; perhaps you missed a comma?
var = [1, 2, 3]["x"]
Traceback (most recent call last):
File "example.py", line 1, in <module>
var = [1, 2, 3]["x"]
~~~~~~~~~^^^^^
TypeError: list indices must be integers or slices, not str
```
Previously, Ruff would not report the invalid syntax but now a violation
will be reported. This does not apply to cases where a variable, call,
or complex expression is used in the index — detection is roughly
limited to static definitions, which matches Python's warnings.
```
❯ ./target/debug/ruff example.py --select RUF015 --show-source --no-cache
example.py:1:17: RUF015 Indexed access to type `list` uses type `str` instead of an integer or slice.
|
1 | var = [1, 2, 3]["x"]
| ^^^ RUF015
|
```
Closes https://github.com/astral-sh/ruff/issues/5082
xref
ffff1440d1
## Summary
Replaces `DictionaryKey` enum with the more general `ComparableExpr`
when checking for duplicate keys
## Test Plan
Added test fixture from issue. Can potentially be expanded further
depending on what exactly we want to flag (e.g. do we also want to check
for unhashable types?) and which `ComparableExpr::XYZ` types we consider
literals.
## Issue link
Closes: https://github.com/astral-sh/ruff/issues/5691
## Summary
Similar to #5567, we can remove the use of regex, plus simplify the
representation (use `Option`), add snapshot tests, etc.
This is about 100x faster than using a regex for cases that match (2.5ns
vs. 250ns). It's obviously not a hot path, but I prefer the consistency
with other similar comment-parsing. I may DRY these up into some common
functionality later on.
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## Summary
This PR matches Black' behavior where it only omits the optional parentheses if the expression starts or ends with a parenthesized expression:
```python
a + [aaa, bbb, cccc] * c # Don't omit
[aaa, bbb, cccc] + a * c # Split
a + c * [aaa, bbb, ccc] # Split
```
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
This improves the Jaccard index from 0.945 to 0.946
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## Summary
This PR improves the Black compatibility when it comes to breaking comprehensions.
We want to avoid line breaks before the target and `in` whenever possible. Furthermore, `if X is not None` should be grouped together, similar to other binary like expressions
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo test`
<!-- How was it tested? -->
## Summary
We don't use `ModExpression` anywhere but it's part of the AST, removes
one `not_implemented_yet` and is a trivial 2-liner, so i implemented
formatting for `ModExpression`.
## Test Plan
None, this kind of node does not occur in file input. Otherwise all the
tests for expressions
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## Summary
I started working on this because I assumed that I would need access to options inside of `NeedsParantheses` but it then turned out that I won't.
Anyway, it kind of felt nice to pass fewer arguments. So I'm gonna put this out here to get your feedback if you prefer this over passing individual fiels.
Oh, I sneeked in another change. I renamed `context.contents` to `source`. `contents` is too generic and doesn't tell you anything.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
It compiles
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## Summary
This PR removes the `mode` field from `BestFitting` because it is no longer used (we now use `conditional_group` and `fits_expanded).
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
`cargo test`
<!-- How was it tested? -->
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## Summary
This PR implements Black's behavior where it first splits off parenthesized expressions before splitting before operands to avoid unnecessary parentheses:
```python
# We want
if a + [
b,
c
]:
pass
# Rather than
if (
a
+ [b, c]
):
pass
```
This is implemented by using the new IR elements introduced in #5596.
* We give the group wrapping the optional parentheses an ID (`parentheses_id`)
* We use `conditional_group` for the lower priority groups (all non-parenthesized expressions) with the condition that the `parentheses_id` group breaks (we want to split before operands only if the parentheses are necessary)
* We use `fits_expanded` to wrap all other parenthesized expressions (lists, dicts, sets), to prevent that expanding e.g. a list expands the `parentheses_id` group. We gate the `fits_expand` to only apply if the `parentheses_id` group fits (because we prefer `a\n+[b, c]` over expanding `[b, c]` if the whole expression gets parenthesized).
We limit using `fits_expanded` and `conditional_group` only to expressions that themselves are not in parentheses (checking the conditions isn't free)
## Test Plan
It increases the Jaccard index for Django from 0.915 to 0.917
## Incompatibilites
There are two incompatibilities left that I'm aware of (there may be more, I didn't go through all snapshot differences).
### Long string literals
I commented on the regression. The issue is that a very long string (or any content without a split point) may not fit when only breaking the right side. The formatter than inserts the optional parentheses. But this is kind of useless because the overlong string will still not fit, because there are no new split points.
I think we should ignore this incompatibility for now
### Expressions on statement level
I don't fully understand the logic behind this yet, but black doesn't break before the operators for the following example even though the expression exceeds the configured line width
```python
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa < bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb > ccccccccccccccccccccccccccccc == ddddddddddddddddddddd
```
But it would if the expression is used inside of a condition.
What I understand so far is that Black doesn't insert optional parentheses on the expression statement level (and a few other places) and, therefore, only breaks after opening parentheses. I propose to keep this deviation for now to avoid overlong-lines and use the compatibility report to make a decision if we should implement the same behavior.
## Summary
The similarity index, the fraction of unchanged lines, is easier to
understand than the jaccard index, the fraction between intersection and
union.
## Test Plan
I ran this on django and git a 0.945 index, meaning 5.5% of lines are
currently reformatted when compared to black
## Summary
Format statements such as `tree_depth += 1`. This is a statement that
does not allow any line breaks, the only thing to be mindful of is to
parenthesize the assigned expression
Jaccard index on django: 0.915 -> 0.918
## Test Plan
black tests, and two new tests, a basic one and one that ensures that
the child gets parentheses. I ran the django stability check.
Dhruv Manilawala
Charlie Marsh
Zanie Blue
Micha Reiser
konsti
Victor Hugo Gomes
Harutaka Kawamura
Tom Kuson
Konrad Listwan-Ciesielski
Chris Pryer
Shantanu
Evan Rittenhouse
qdegraaf
Takuma Watanabe
Presley Graham
James Braza
David Szotten
magic-akari
rco-ableton
Piotr
Zixuan Li
Anders Kaseorg
Silvano Cerza
Ran Benita
Luc Khai Hai
Aarni Koskela
rembridge
Jelle van der Waa
Simon Brugman
Ville Skyttä
Alex Waygood
David Cain
Nikita Sobolev
Justin Prieto
guillaumeLepape
skykasko
eggplants