## Summary
This PR updates our documentation for the upcoming formatter release.
Broadly, the documentation is now structured as follows:
- Overview
- Tutorial
- Installing Ruff
- The Ruff Linter
- Overview
- `ruff check`
- Rule selection
- Error suppression
- Exit codes
- The Ruff Formatter
- Overview
- `ruff format`
- Philosophy
- Configuration
- Format suppression
- Exit codes
- Black compatibility
- Known deviations
- Configuring Ruff
- pyproject.toml
- File discovery
- Configuration discovery
- CLI
- Shell autocompletion
- Preview
- Rules
- Settings
- Integrations
- `pre-commit`
- VS Code
- LSP
- PyCharm
- GitHub Actions
- FAQ
- Contributing
The major changes include:
- Removing the "Usage" section from the docs, and instead folding that
information into "Integrations" and the new Linter and Formatter
sections.
- Breaking up "Configuration" into "Configuring Ruff" (for generic
configuration), and new Linter- and Formatter-specific sections.
- Updating all example configurations to use `[tool.ruff.lint]` and
`[tool.ruff.format]`.
My suggestion is to pull and build the docs locally, and review by
reading them in the browser rather than trying to parse all the code
changes.
Closes https://github.com/astral-sh/ruff/issues/7235.
Closes https://github.com/astral-sh/ruff/issues/7647.
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## Summary
Fixes https://github.com/astral-sh/ruff/issues/7448
Fixes https://github.com/astral-sh/ruff/issues/7892
I've removed automatic dangling comment formatting, we're doing manual
dangling comment formatting everywhere anyway (the
assert-all-comments-formatted ensures this) and dangling comments would
break the formatting there.
## Test Plan
New test file.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
Split out of #8044: In preview style, ellipsis are also collapsed in
non-stub files. This should only affect function/class contexts since
for other statements stub are generally not used. I've updated our tests
to use `pass` instead to reflect this, which makes tracking the preview
style changes much easier.
## Summary
Given an expression like `[x for (x) in y]`, we weren't skipping over
parentheses when searching for the `in` between `(x)` and `y`.
Closes https://github.com/astral-sh/ruff/issues/8053.
**Summary** Insert a newline after nested function and class
definitions, unless there is a trailing own line comment.
We need to e.g. format
```python
if platform.system() == "Linux":
if sys.version > (3, 10):
def f():
print("old")
else:
def f():
print("new")
f()
```
as
```python
if platform.system() == "Linux":
if sys.version > (3, 10):
def f():
print("old")
else:
def f():
print("new")
f()
```
even though `f()` is directly preceded by an if statement, not a
function or class definition. See the comments and fixtures for trailing
own line comment handling.
**Test Plan** I checked that the new content of `newlines.py` matches
black's formatting.
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
**Summary** Handle comment before the default values of function
parameters correctly by inserting a line break instead of space after
the equals sign where required.
```python
def f(
a = # parameter trailing comment; needs line break
1,
b =
# default leading comment; needs line break
2,
c = ( # the default leading can only be end-of-line with parentheses; no line break
3
),
d = (
# own line leading comment with parentheses; no line break
4
)
)
```
Fixes#7603
**Test Plan** Added the different cases and one more complex case as
fixtures.
**Summary** Remove spaces from import statements such as
```python
import tqdm . tqdm
from tqdm . auto import tqdm
```
See also #7760 for a better solution.
**Test Plan** New fixtures
**Summary** Quoting of f-strings can change if they are triple quoted
and only contain single quotes inside.
Fixes#6841
**Test Plan** New fixtures
---------
Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>
## Summary
This PR fixes the bug where the formatter would panic if a class/function with
decorators had a suppression comment.
The fix is to use to correct start location to find the `async`/`def`/`class`
keyword when decorators are present which is the end of the last
decorator.
## Test Plan
Add test cases for the fix and update the snapshots.
## Summary
It turns out that _some_ identifiers can contain newlines --
specifically, dot-delimited import identifiers, like:
```python
import foo\
.bar
```
At present, we print all identifiers verbatim, which causes us to retain
the `\` in the formatted output. This also leads to violating some debug
assertions (see the linked issue, though that's a symptom of this
formatting failure).
This PR adds detection for import identifiers that contain newlines, and
formats them via `text` (slow) rather than `source_code_slice` (fast) in
those cases.
Closes https://github.com/astral-sh/ruff/issues/7734.
## Test Plan
`cargo test`
## Summary
At present, `quote-style` is used universally. However, [PEP
8](https://peps.python.org/pep-0008/) and [PEP
257](https://peps.python.org/pep-0257/) suggest that while either single
or double quotes are acceptable in general (as long as they're
consistent), docstrings and triple-quoted strings should always use
double quotes. In our research, the vast majority of Ruff users that
enable the `flake8-quotes` rules only enable them for inline strings
(i.e., non-triple-quoted strings).
Additionally, many Black forks (like Blue and Pyink) use double quotes
for docstrings and triple-quoted strings.
Our decision for now is to always prefer double quotes for triple-quoted
strings (which should include docstrings). Based on feedback, we may
consider adding additional options (e.g., a `"preserve"` mode, to avoid
changing quotes; or a `"multiline-quote-style"` to override this).
Closes https://github.com/astral-sh/ruff/issues/7615.
## Test Plan
`cargo test`
## Summary
Extends the pragma comment detection in the formatter to support
case-insensitive `noqa` (as supposed by Ruff), plus a variety of other
pragmas (`isort:`, `nosec`, etc.).
Also extracts the detection out into the trivia crate so that we can
reuse it in the linter (see:
https://github.com/astral-sh/ruff/issues/7471).
## Test Plan
`cargo test`
## Summary
No-op refactor, but we can evaluate early if the first part of
`preserve_parentheses || has_comments` is `true`, and thus avoid looking
up the node comments.
## Test Plan
`cargo test`
## Summary
The formatting for tuple patterns is now intended to match that of `for`
loops:
- Always parenthesize single-element tuples.
- Don't break on the trailing comma in single-element tuples.
- For other tuples, preserve the parentheses, and insert if-breaks.
Closes https://github.com/astral-sh/ruff/issues/7681.
## Test Plan
`cargo test`
I got confused and refactored a bit, now the naming should be more
consistent. This is the basis for the range formatting work.
Chages:
* `format_module` -> `format_module_source` (format a string)
* `format_node` -> `format_module_ast` (format a program parsed into an
AST)
* Added `parse_ok_tokens` that takes `Token` instead of `Result<Token>`
* Call the source code `source` consistently
* Added a `tokens_and_ranges` helper
* `python_ast` -> `module` (because that's the type)
## Summary
This is whitespace as per `is_python_whitespace`, and right now it tends
to lead to panics in the formatter. Seems reasonable to treat it as
whitespace in the `SimpleTokenizer` too.
Closes .https://github.com/astral-sh/ruff/issues/7624.
## Summary
Given:
```python
if True:
if True:
pass
else:
pass
# a
# b
# c
else:
pass
```
We want to preserve the newline after the `# c` (before the `else`).
However, the `last_node` ends at the `pass`, and the comments are
trailing comments on the `pass`, not trailing comments on the
`last_node` (the `if`). As such, when counting the trailing newlines on
the outer `if`, we abort as soon as we see the comment (`# a`).
This PR changes the logic to skip _all_ comments (even those with
newlines between them). This is safe as we know that there are no
"leading" comments on the `else`, so there's no risk of skipping those
accidentally.
Closes https://github.com/astral-sh/ruff/issues/7602.
## Test Plan
No change in compatibility.
Before:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1631 |
| django | 0.99983 | 2760 | 36 |
| transformers | 0.99963 | 2587 | 319 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99979 | 3496 | 22 |
| warehouse | 0.99967 | 648 | 15 |
| zulip | 0.99972 | 1437 | 21 |
After:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1631 |
| django | 0.99983 | 2760 | 36 |
| transformers | 0.99963 | 2587 | 319 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99967 | 648 | 15 |
| zulip | 0.99972 | 1437 | 21 |
Similar to tuples, a generator _can_ be parenthesized or
unparenthesized. Only search for bracketed comments if it contains its
own parentheses.
Closes https://github.com/astral-sh/ruff/issues/7623.
## Summary
Given:
```python
if True:
if True:
if True:
pass
#a
#b
#c
else:
pass
```
When determining the placement of the various comments, we compute the
indentation depth of each comment, and then compare it to the depth of
the previous statement. It turns out this can lead to reordering
comments, e.g., above, `#b` is assigned as a trailing comment of `pass`,
and so gets reordered above `#a`.
This PR modifies the logic such that when we compute the indentation
depth of `#b`, we limit it to at most the indentation depth of `#a`. In
other words, when analyzing comments at the end of branches, we don't
let successive comments go any _deeper_ than their preceding comments.
Closes https://github.com/astral-sh/ruff/issues/7602.
## Test Plan
`cargo test`
No change in similarity.
Before:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1631 |
| django | 0.99983 | 2760 | 36 |
| transformers | 0.99963 | 2587 | 319 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99979 | 3496 | 22 |
| warehouse | 0.99967 | 648 | 15 |
| zulip | 0.99972 | 1437 | 21 |
After:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1631 |
| django | 0.99983 | 2760 | 36 |
| transformers | 0.99963 | 2587 | 319 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99979 | 3496 | 22 |
| warehouse | 0.99967 | 648 | 15 |
| zulip | 0.99972 | 1437 | 21 |
## Summary
Given:
```python
# -*- coding: utf-8 -*-
import random
# Defaults for arguments are defined here
# args.threshold = None;
logger = logging.getLogger("FastProject")
```
We want to count the number of newlines after `import random`, to ensure
that there's _at least one_, but up to two.
Previously, we used the end range of the statement (then skipped
trivia); instead, we need to use the end of the _last comment_. This is
similar to #7556.
Closes https://github.com/astral-sh/ruff/issues/7604.
## Summary
This is only used for the `level` field in relative imports (e.g., `from
..foo import bar`). It seems unnecessary to use a wrapper here, so this
PR changes to a `u32` directly.
## Summary
When we format the trailing comments on a clause body, we check if there
are any newlines after the last statement; if not, we insert one.
This logic didn't take into account that the last statement could itself
have trailing comments, as in:
```python
if True:
pass
# comment
else:
pass
```
We were thus inserting a newline after the comment, like:
```python
if True:
pass
# comment
else:
pass
```
In the context of function definitions, this led to an instability,
since we insert a newline _after_ a function, which would in turn lead
to the bug above appearing in the second formatting pass.
Closes https://github.com/astral-sh/ruff/issues/7465.
## Test Plan
`cargo test`
Small improvement in `transformers`, but no regressions.
Before:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1631 |
| django | 0.99983 | 2760 | 36 |
| transformers | 0.99956 | 2587 | 404 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99967 | 648 | 15 |
| zulip | 0.99972 | 1437 | 21 |
After:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1631 |
| django | 0.99983 | 2760 | 36 |
| **transformers** | **0.99957** | **2587** | **402** |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99967 | 648 | 15 |
| zulip | 0.99972 | 1437 | 21 |
## Summary
If a function has no parameters (and no comments within the parameters'
`()`), we're supposed to wrap the return annotation _whenever_ it
breaks. However, our `empty_parameters` test didn't properly account for
the case in which the parameters include a newline (but no other
content), like:
```python
def get_dashboards_hierarchy(
) -> Dict[Type['BaseDashboard'], List[Type['BaseDashboard']]]:
"""Get hierarchy of dashboards classes.
Returns:
Dict of dashboards classes.
"""
dashboards_hierarchy = {}
```
This PR fixes that detection. Instead of lexing, it now checks if the
parameters itself is empty (or if it contains comments).
Closes https://github.com/astral-sh/ruff/issues/7457.
## Summary
The tokenizer was split into a forward and a backwards tokenizer. The
backwards tokenizer uses the same names as the forwards ones (e.g.
`next_token`). The backwards tokenizer gets the comment ranges that we
already built to skip comments.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
## Summary
We're planning to move the documentation from
[https://beta.ruff.rs/docs](https://beta.ruff.rs/docs) to
[https://docs.astral.sh/ruff](https://docs.astral.sh/ruff), for a few
reasons:
1. We want to remove the `beta` from the domain, as Ruff is no longer
considered beta software.
2. We want to migrate to a structure that could accommodate multiple
future tools living under one domain.
The docs are actually already live at
[https://docs.astral.sh/ruff](https://docs.astral.sh/ruff), but later
today, I'll add a permanent redirect from the previous to the new
domain. **All existing links will continue to work, now and in
perpetuity.**
This PR contains the code changes necessary for the updated
documentation. As part of this effort, I moved the playground and
documentation from my personal Cloudflare account to our team Cloudflare
account (hence the new `--project-name` references). After merging, I'll
also update the secrets on this repo.
## Summary
Given a trailing operator comment in a unary expression, like:
```python
if (
not # comment
a):
...
```
We were attaching these to the operand (`a`), but formatting them in the
unary operator via special handling. Parents shouldn't format the
comments of their children, so this instead attaches them as dangling
comments on the unary expression. (No intended change in formatting.)
## Summary
Given a statement like:
```python
result = (
f(111111111111111111111111111111111111111111111111111111111111111111111111111111111)
+ 1
)()
```
When we go to parenthesize the target of the assignment, we use
`maybe_parenthesize_expression` with `Parenthesize::IfBreaks`. This then
checks if the call on the right-hand side needs to be parenthesized, the
implementation of which looks like:
```rust
impl NeedsParentheses for ExprCall {
fn needs_parentheses(
&self,
_parent: AnyNodeRef,
context: &PyFormatContext,
) -> OptionalParentheses {
if CallChainLayout::from_expression(self.into(), context.source())
== CallChainLayout::Fluent
{
OptionalParentheses::Multiline
} else if context.comments().has_dangling(self) {
OptionalParentheses::Always
} else {
self.func.needs_parentheses(self.into(), context)
}
}
}
```
Checking for `self.func.needs_parentheses(self.into(), context)` is
problematic, since, as in the example above, `self.func` may _already_
be parenthesized -- in which case, we _don't_ want to parenthesize the
entire expression. If we do, we end up with this non-ideal formatting:
```python
result = (
(
f(
111111111111111111111111111111111111111111111111111111111111111111111111111111111
)
+ 1
)()
)
```
This PR modifies the `NeedsParentheses` implementations for call chain
expressions to return `Never` if the inner expression has its own
parentheses, in which case, the formatting implementations for those
expressions will preserve them anyway.
Closes https://github.com/astral-sh/ruff/issues/7370.
## Test Plan
Zulip improves a bit, everything else is unchanged.
Before:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99981 | 2760 | 40 |
| transformers | 0.99944 | 2587 | 413 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99834 | 648 | 20 |
| zulip | 0.99956 | 1437 | 23 |
After:
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99981 | 2760 | 40 |
| transformers | 0.99944 | 2587 | 413 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99834 | 648 | 20 |
| **zulip** | **0.99962** | **1437** | **22** |
## Summary
Fix all but one empty line differences with the black preview style in
typeshed. The remaining differences are breaking with type comments and
trailing commas in function definitions.
I compared the empty line differences with the preview mode of black
since stable has some oddities that would have been hard to replicate
(https://github.com/psf/black/issues/3861). Additionally, it assumes the
style proposed in https://github.com/psf/black/issues/3862.
An edge case that also surfaced with typeshed are newline before
trailing module comments.
**main**
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99966 | 2760 | 58 |
| transformers | 0.99930 | 2587 | 447 |
| twine | 1.00000 | 33 | 0 |
| **typeshed** | 0.99978 | 3496 | **2173** |
| warehouse | 0.99825 | 648 | 22 |
| zulip | 0.99950 | 1437 | 27 |
**PR**
| project | similarity index | total files | changed files |
|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99966 | 2760 | 58 |
| transformers | 0.99930 | 2587 | 447 |
| twine | 1.00000 | 33 | 0 |
| **typeshed** | 0.99983 | 3496 | **18** |
| warehouse | 0.99825 | 648 | 22 |
| zulip | 0.99950 | 1437 | 27 |
Closes#6723
## Test Plan
The main driver was the typeshed diff. I added new test cases for all
kinds of possible empty line combinations in stub files, test cases for
newlines before trailing module comments.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
## Summary
This PR adds the `--preview` and `--no-preview` options to the `format` command (hidden) and passes it through to the formatte.
## Test Plan
I added the `dbg(f.options().preview())` statement in `FormatNodeRule::fmt` and verified that the option gets correctly passed to the formatter.
Show header for formatter comment decoration info
**Summary** Show a header in the formatter comment decoration debug
output that shows which node is preceding/following/enclosing
(https://github.com/astral-sh/ruff/pull/6813#issuecomment-1708119550). I
kept this intentionally condensed to make it easy to use this is a small
sidebar without vertical scrolling.
```console
$ cargo run --bin ruff_python_formatter -- --emit stdout --print-comments scratch.py
# Comment decoration: Range, Preceding, Following, Enclosing, Comment
17..20, Some((ParameterWithDefault, 6..10)), None, (Parameters, 5..22), "# a"
44..47, Some((StmtExpr, 28..39)), Some((StmtExpr, 52..60)), (StmtFunctionDef, 0..60), "# b"
77..80, None, None, (ExprList, 71..82), "# c"
{
Node {
kind: ParameterWithDefault,
range: 6..10,
source: `x=[]`,
}: {
...
```
**Test Plan** It's debug output.
**Summary** The comment visitor used to rebuild the locator for every
comment. Instead, we now keep the locator on the builder. Follow-up to
#6813.
**Test Plan** No formatting changes.
## Summary
This PR modifies our between-statement comment handling such that
comments that are not separated by a statement by any newlines continue
to be treated as leading comments on the statement, but comments that
_are_ separated are instead formatted as trailing comments on the
preceding statement.
See, e.g., the originating snippet:
```python
DEFAULT_TEMPLATE = "flatpages/default.html"
# This view is called from FlatpageFallbackMiddleware.process_response
# when a 404 is raised, which often means CsrfViewMiddleware.process_view
# has not been called even if CsrfViewMiddleware is installed. So we need
# to use @csrf_protect, in case the template needs {% csrf_token %}.
# However, we can't just wrap this view; if no matching flatpage exists,
# or a redirect is required for authentication, the 404 needs to be returned
# without any CSRF checks. Therefore, we only
# CSRF protect the internal implementation.
def flatpage(request, url):
pass
```
Here, we need to ensure that the `def flatpage` is precede by two empty
lines. However, we want those two empty lines to be enforced from the
_end_ of the comment block, _unless_ the comments are directly atop the
`def flatpage`.
I played with this a bit, and I think the simplest conceptual model and
implementation is to instead treat those as trailing comments on the
preceding node. The main difficulty with this approach is that, in order
to be fully compatible with Black, we'd sometimes need to insert
newlines _between_ the preceding node and its trailing comments. See,
e.g.:
```python
def func():
...
# comment
x = 1
```
In this case, we'd need to insert two blank lines between `def func():
...` and `# comment`, but `# comment` is trailing comment on `def
func(): ...`. So, we'd need to take this case into account in the
various nodes that _require_ newlines after them: functions, classes,
and imports. After some discussion, we've opted _not_ to support this,
and just treat these as trailing comments -- so we won't insert newlines
there. This means our handling is still identical to Black's on
Black-formatted code, but avoids moving such trailing comments on
unformatted code.
I dislike that the empty handling is so complex, and that it's split
between so many different nodes, but this is really tricky. Continuing
to treat these as leading comments is very difficult too, since we'd
need to do similar tricks for the leading comment handling in those
nodes, and influencing leading comments is even harder, since they're
all formatted _before_ the node itself.
Closes https://github.com/astral-sh/ruff/issues/6761.
## Test Plan
`cargo test`
Surprisingly, it doesn't change the similarity at all (apart from a
0.00001 change in CPython), but I manually confirmed that it did fix the
originating issue in Django.
Before:
| project | similarity index |
|--------------|------------------|
| cpython | 0.76082 |
| django | 0.99921 |
| transformers | 0.99854 |
| twine | 0.99982 |
| typeshed | 0.99953 |
| warehouse | 0.99648 |
| zulip | 0.99928 |
After:
| project | similarity index |
|--------------|------------------|
| cpython | 0.76081 |
| django | 0.99921 |
| transformers | 0.99854 |
| twine | 0.99982 |
| typeshed | 0.99953 |
| warehouse | 0.99648 |
| zulip | 0.99928 |
## Summary
This PR adds comment handling for comments between the `=` and the
`value` for keywords, as in the following cases:
```python
func(
x # dangling
= # dangling
# dangling
1,
** # dangling
y
)
```
(Comments after the `**` were already handled in some cases, but I've
unified the handling with the `=` handling.)
Note that, previously, comments between the `**` and its value were
rendered as trailing comments on the value (so they'd appear after `y`).
This struck me as odd since it effectively re-ordered the comment with
respect to its closest AST node (the value). I've made them leading
comments, though I don't know that that's a significant improvement. I
could also imagine us leaving them where they are.
## Summary
As a small quality-of-life improvement, the locator can now slice like
`locator.slice(stmt)` instead of requiring
`locator.slice(stmt.range())`.
## Test Plan
`cargo test`
**Summary** Add recursive formatting based on `ruff check` file
discovery for `ruff format`, as a prototype for the formatter alpha.
This allows e.g. `format ../projects/django/`. It's still lacking
support for any settings except line length.
Note just like the existing `ruff format` this will become part of the
production build, i.e. you'll be able to use it - hidden by default and
with a prominent warning - with `ruff format .` after the next release.
Error handling works in my manual tests (the colors do also work):
```
$ target/debug/ruff format scripts/
warning: `ruff format` is a work-in-progress, subject to change at any time, and intended for internal use only.
```
(the above changes `add_rule.py` where we have the wrong bin op
breaking)
```
$ target/debug/ruff format ../projects/django/
warning: `ruff format` is a work-in-progress, subject to change at any time, and intended for internal use only.
Failed to format /home/konsti/projects/django/tests/test_runner_apps/tagged/tests_syntax_error.py: source contains syntax errors: ParseError { error: UnrecognizedToken(Name { name: "syntax_error" }, None), offset: 131, source_path: "<filename>" }
```
```
$ target/debug/ruff format a
warning: `ruff format` is a work-in-progress, subject to change at any time, and intended for internal use only.
Failed to read /home/konsti/ruff/a/d.py: Permission denied (os error 13)
```
**Test Plan** Missing! I'm not sure if it's worth building tests at this
stage or how they should look like.
## Summary
The motivation here is that this enables us to implement `Ranged` in
crates that don't depend on `ruff_python_ast`.
Largely a mechanical refactor with a lot of regex, Clippy help, and
manual fixups.
## Test Plan
`cargo test`
## Summary
This PR introduces two new AST nodes to improve the representation of
`PatternMatchClass`. As a reminder, `PatternMatchClass` looks like this:
```python
case Point2D(0, 0, x=1, y=2):
...
```
Historically, this was represented as a vector of patterns (for the `0,
0` portion) and parallel vectors of keyword names (for `x` and `y`) and
values (for `1` and `2`). This introduces a bunch of challenges for the
formatter, but importantly, it's also really different from how we
represent similar nodes, like arguments (`func(0, 0, x=1, y=2)`) or
parameters (`def func(x, y)`).
So, firstly, we now use a single node (`PatternArguments`) for the
entire parenthesized region, making it much more consistent with our
other nodes. So, above, `PatternArguments` would be `(0, 0, x=1, y=2)`.
Secondly, we now have a `PatternKeyword` node for `x=1` and `y=2`. This
is much more similar to the how `Keyword` is represented within
`Arguments` for call expressions.
Closes https://github.com/astral-sh/ruff/issues/6866.
Closes https://github.com/astral-sh/ruff/issues/6880.
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## Summary
Adds support for `PatternMatchMapping` -- i.e., cases like:
```python
match foo:
case {"a": 1, "b": 2, **rest}:
pass
```
Unfortunately, this node has _three_ kinds of dangling comments:
```python
{ # "open parenthesis comment"
key: pattern,
** # end-of-line "double star comment"
# own-line "double star comment"
rest # end-of-line "after rest comment"
# own-line "after rest comment"
}
```
Some of the complexity comes from the fact that in `**rest`, `rest` is
an _identifier_, not a node, so we have to handle comments _after_ it as
dangling on the enclosing node, rather than trailing on `**rest`. (We
could change the AST to use `PatternMatchAs` there, which would be more
permissive than the grammar but not totally crazy -- `PatternMatchAs` is
used elsewhere to mean "a single identifier".)
Closes https://github.com/astral-sh/ruff/issues/6644.
## Test Plan
`cargo test`
## Summary
This PR ensures that if an expression has an own-line leading comment
_before_ its open parentheses, we render it as such.
For example, given:
```python
[ # foo
# bar
( # baz
1
)
]
```
On `main`, we format as:
```python
[ # foo
(
# bar
# baz
1
)
]
```
As of this PR, we format as:
```python
[ # foo
# bar
( # baz
1
)
]
```
## Test Plan
`cargo test`
## Summary
This PR ensures that we handle bracketed comments on sequences, like `#
comment` here:
```python
match x:
case [ # comment
1, 2
]:
pass
```
The handling is very similar to other, similar nodes, except that we do
need some special logic to determine whether the sequence is
parenthesized, similar to our logic for tuples.
## Test Plan
`cargo test`
## Summary
This PR modifies our formatting of comments around the `.` in an
attribute. Specifically, the goal here is to avoid _reordering_
comments, and the net effect is that we generally leave comments
where-they-are when dealing with comments between around the dot (which
you can also think of as comments between attributes).
All comments around the dot are now treated as dangling and formatted
manually, with the exception of end-of-line or parenthesized comments on
the value, like those marked as trailing here, which remain trailing:
```python
(
(
a # trailing end-of-line
# trailing own-line
) # dangling before dot end-of-line
.b # trailing end-of-line
)
```
Closes https://github.com/astral-sh/ruff/issues/6823.
## Test Plan
`cargo test`
Before:
| project | similarity index |
|--------------|------------------|
| cpython | 0.76050 |
| django | 0.99820 |
| transformers | 0.99800 |
| twine | 0.99876 |
| typeshed | 0.99953 |
| warehouse | 0.99615 |
| zulip | 0.99729 |
After:
| project | similarity index |
|--------------|------------------|
| cpython | 0.76050 |
| django | 0.99820 |
| transformers | 0.99800 |
| twine | 0.99876 |
| typeshed | 0.99953 |
| warehouse | 0.99615 |
| zulip | 0.99729 |
## Summary
This PR fixes the duplicate-parenthesis problem that's visible in the
tests from https://github.com/astral-sh/ruff/pull/6799. The issue is
that we might have parentheses around the entire match-case pattern,
like in `(1)` here:
```python
match foo:
case (1):
y = 0
```
In this case, the inner expression (`1`) will _think_ it's
parenthesized, but we'll _also_ detect the parentheses at the case level
-- so they get rendered by the case, then again by the expression.
Instead, if we detect parentheses at the case level, we can force-off
the parentheses for the pattern using a design similar to the way we
handle parentheses on expressions.
Closes https://github.com/astral-sh/ruff/issues/6753.
## Test Plan
`cargo test`
The docs were out of date, and the new version incorporates some
feedback.
I tried to keep the language concise and the information ordered by how
early you need it, so people can get the relevant information quickly
before jumping into the code.
I did some minor format_dev changes for consistency in the docs.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
## Summary
This is effectively #6608, but with additional tests.
We aren't properly handling parenthesized patterns, but that needs to be
dealt with separately as it's somewhat involved.
Closes#6555
## Summary
Follows up on
https://github.com/astral-sh/ruff/pull/6652#discussion_r1300871033 with
some modifications to the `PatternMatchAs` comment handling.
Specifically, any comments between the `as` and the end are now
formatted as dangling, and we now insert some newlines in the
appropriate places.
## Test Plan
`cargo test`
## Summary
Ensures that we retain the open-parenthesis comment in cases like:
```python
match pattern_comments:
case ( # leading
only_leading
):
...
```
Previously, this was treated as a leading comment on `only_leading`.
## Test Plan
`cargo test`
## 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`
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
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`
## 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
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
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
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
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** 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 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
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** 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
## 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
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
## 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
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
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
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
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** 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>
## 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.
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
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
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
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`
## 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
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** 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.
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## Summary
Format bytes string
Closes#6064
## Test Plan
Added a fixture based on string's one
## 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
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.
## 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.
## 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
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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.
## 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** 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** 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** 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
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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
## 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** 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
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
```
## 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>
## 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.
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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
`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
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
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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 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.
## Summary
This is the result of running `cargo +nightly clippy --workspace
--all-targets --all-features -- -D warnings` and fixing all violations.
Just wanted to see if there were any interesting new checks on nightly
👀
## Summary
This PR implements the formatting of `raise` statements. I haven't
looked at the black implementation, this is inspired from from the
`return` statements formatting.
## Test Plan
The black differences with insta.
I also compared manually some edge cases with very long string and call
chaining and it seems to do the same formatting as black.
There is one issue:
```python
# input
raise OsError(
"aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa"
) from a.aaaaa(aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa).a(aaaa)
# black
raise OsError(
"aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa"
) from a.aaaaa(
aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa
).a(
aaaa
)
# ruff
raise OsError(
"aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa"
) from a.aaaaa(
aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa
).a(aaaa)
```
But I'm not sure this diff is the raise formatting implementation.
---------
Co-authored-by: Louis Dispa <ldispa@deezer.com>
## Summary
Fix an oversight in `find_only_token_in_range` where the following code
would panic due do the closing and opening parentheses being in the
range we scan:
```python
d1 = [
("a") if # 1
("b") else # 2
("c")
]
```
Closing and opening parentheses respectively are now correctly skipped.
## Test Plan
I added a regression test
Charlie Marsh
konsti
Micha Reiser
Chris Pryer
Cosmo
Dhruv Manilawala
qdegraaf
magic-akari
Victor Hugo Gomes
David Szotten
Harutaka Kawamura
Luc Khai Hai
Tom Kuson
Zanie Blue
Louis Dispa