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Fix formatting of single with-item with trailing comment (#14005)

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Micha Reiser 2024-11-01 09:08:06 +01:00 • committed by GitHub
parent 20b8a43017
commit cf0f5e1318
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5 changed files with 276 additions and 14 deletions
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34
crates/ruff_python_formatter/src/other/with_item.rs
View file

@ -6,9 +6,11 @@ use crate::expression::parentheses::{
is_expression_parenthesized, parenthesized, Parentheses, Parenthesize,
};
use crate::prelude::*;
use crate::preview::is_with_single_item_pre_39_enabled;
use crate::preview::{
is_with_single_item_pre_39_enabled, is_with_single_target_parentheses_enabled,
};
#[derive(Copy, Clone, Debug, Eq, PartialEq, Default)]
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum WithItemLayout {
/// A with item that is the `with`s only context manager and its context expression is parenthesized.
///
@ -69,8 +71,7 @@ pub enum WithItemLayout {
/// a
// ): ...
/// ```
#[default]
ParenthesizedContextManagers,
ParenthesizedContextManagers { single: bool },
}
#[derive(Default)]
@ -78,6 +79,12 @@ pub struct FormatWithItem {
layout: WithItemLayout,
}
impl Default for WithItemLayout {
fn default() -> Self {
WithItemLayout::ParenthesizedContextManagers { single: false }
}
}
impl FormatRuleWithOptions<WithItem, PyFormatContext<'_>> for FormatWithItem {
type Options = WithItemLayout;
@ -97,6 +104,10 @@ impl FormatNodeRule<WithItem> for FormatWithItem {
let comments = f.context().comments().clone();
let trailing_as_comments = comments.dangling(item);
// WARNING: The `is_parenthesized` returns false-positives
// if the `with` has a single item without a target.
// E.g., it returns `true` for `with (a)` even though the parentheses
// belong to the with statement and not the expression but it can't determine that.
let is_parenthesized = is_expression_parenthesized(
context_expr.into(),
f.context().comments().ranges(),
@ -105,10 +116,17 @@ impl FormatNodeRule<WithItem> for FormatWithItem {
match self.layout {
// Remove the parentheses of the `with_items` if the with statement adds parentheses
WithItemLayout::ParenthesizedContextManagers => {
if is_parenthesized {
// ...except if the with item is parenthesized, then use this with item as a preferred breaking point
// or when it has comments, then parenthesize it to prevent comments from moving.
WithItemLayout::ParenthesizedContextManagers { single } => {
// ...except if the with item is parenthesized and it's not the only with item or it has a target.
// Then use the context expression as a preferred breaking point.
let prefer_breaking_context_expression =
if is_with_single_target_parentheses_enabled(f.context()) {
(optional_vars.is_some() || !single) && is_parenthesized
} else {
is_parenthesized
};
if prefer_breaking_context_expression {
maybe_parenthesize_expression(
context_expr,
item,

7
crates/ruff_python_formatter/src/preview.rs
View file

@ -72,3 +72,10 @@ pub(crate) fn is_docstring_code_block_in_docstring_indent_enabled(
pub(crate) fn is_join_implicit_concatenated_string_enabled(context: &PyFormatContext) -> bool {
context.is_preview()
}
/// Returns `true` if the bugfix for single-with items with a trailing comment targeting Python 3.9 or newer is enabled.
///
/// See [#14001](https://github.com/astral-sh/ruff/issues/14001)
pub(crate) fn is_with_single_target_parentheses_enabled(context: &PyFormatContext) -> bool {
context.is_preview()
}

30
crates/ruff_python_formatter/src/statement/stmt_with.rs
View file

@ -71,7 +71,10 @@ impl FormatNodeRule<StmtWith> for FormatStmtWith {
match layout {
WithItemsLayout::SingleWithTarget(single) => {
optional_parentheses(&single.format()).fmt(f)
optional_parentheses(&single.format().with_options(
WithItemLayout::ParenthesizedContextManagers { single: true },
))
.fmt(f)
}
WithItemsLayout::SingleWithoutTarget(single) => single
@ -93,7 +96,11 @@ impl FormatNodeRule<StmtWith> for FormatStmtWith {
for item in &with_stmt.items {
joiner.entry_with_line_separator(
item,
&item.format(),
&item.format().with_options(
WithItemLayout::ParenthesizedContextManagers {
single: with_stmt.items.len() == 1,
},
),
soft_line_break_or_space(),
);
}
@ -114,9 +121,22 @@ impl FormatNodeRule<StmtWith> for FormatStmtWith {
WithItemsLayout::Parenthesized => parenthesized(
"(",
&format_with(|f: &mut PyFormatter| {
f.join_comma_separated(with_stmt.body.first().unwrap().start())
.nodes(&with_stmt.items)
.finish()
let mut joiner = f.join_comma_separated(
with_stmt.body.first().unwrap().start(),
);
for item in &with_stmt.items {
joiner.entry(
item,
&item.format().with_options(
WithItemLayout::ParenthesizedContextManagers {
single: with_stmt.items.len() == 1,
},
),
);
}
joiner.finish()
}),
")",
)