ruff/crates
Jim Hoekstra 38049aae12
fix missing-required-imports introducing syntax error after dosctring ending with backslash (#19505)
Issue: https://github.com/astral-sh/ruff/issues/19498

## Summary


[missing-required-import](https://docs.astral.sh/ruff/rules/missing-required-import/)
inserts the missing import on the line immediately following the last
line of the docstring. However, if the dosctring is immediately followed
by a continuation token (i.e. backslash) then this leads to a syntax
error because Python interprets the docstring and the inserted import to
be on the same line.

The proposed solution in this PR is to check if the first token after a
file docstring is a continuation character, and if so, to advance an
additional line before inserting the missing import.

## Test Plan

Added a unit test, and the following example was verified manually:

Given this simple test Python file:

```python
"Hello, World!"\

print(__doc__)
```

and this ruff linting configuration in the `pyproject.toml` file:

```toml
[tool.ruff.lint]
select = ["I"]

[tool.ruff.lint.isort]
required-imports = ["import sys"]
```

Without the changes in this PR, the ruff linter would try to insert the
missing import in line 2, resulting in a syntax error, and report the
following:

`error: Fix introduced a syntax error. Reverting all changes.`

With the changes in this PR, ruff correctly advances one more line
before adding the missing import, resulting in the following output:

```python
"Hello, World!"\

import sys

print(__doc__)
```

---------

Co-authored-by: Jim Hoekstra <jim.hoekstra@pacmed.nl>
2025-07-30 12:12:46 -04:00
..
ruff Bump 0.12.7 (#19627) 2025-07-29 18:18:42 -04:00
ruff_annotate_snippets Update Rust toolchain to 1.88 and MSRV to 1.86 (#19011) 2025-06-28 20:24:00 +02:00
ruff_benchmark [ty] Add support for @warnings.deprecated (#19376) 2025-07-18 23:50:29 +00:00
ruff_cache
ruff_db Always expand tabs to four spaces in diagnostics (#19618) 2025-07-30 11:00:36 -04:00
ruff_dev Auto-generate environment variable references for ty (#19205) 2025-07-08 10:48:31 -04:00
ruff_diagnostics [ty] Implement diagnostic caching (#19605) 2025-07-30 11:04:34 +01:00
ruff_formatter
ruff_graph Support .pyi files in ruff analyze graph (#19611) 2025-07-28 22:00:27 -04:00
ruff_index Update Rust toolchain to 1.88 and MSRV to 1.86 (#19011) 2025-06-28 20:24:00 +02:00
ruff_linter fix missing-required-imports introducing syntax error after dosctring ending with backslash (#19505) 2025-07-30 12:12:46 -04:00
ruff_macros [ty] Merge ty_macros into ruff_macros (#19229) 2025-07-09 11:28:21 +00:00
ruff_notebook
ruff_options_metadata
ruff_python_ast Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_ast_integration_tests Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_codegen Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_formatter Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_index
ruff_python_literal
ruff_python_parser Disallow implicit concatenation of t-strings and other string types (#19485) 2025-07-27 12:41:03 +00:00
ruff_python_semantic [ty] Make Module a Salsa ingredient 2025-07-23 09:46:40 -04:00
ruff_python_stdlib
ruff_python_trivia Treat ty: comments as pragma comments (#18532) 2025-06-07 16:02:43 +02:00
ruff_python_trivia_integration_tests
ruff_server Move fix suggestion to subdiagnostic (#19464) 2025-07-22 10:03:58 -04:00
ruff_source_file [ty] Implement diagnostic caching (#19605) 2025-07-30 11:04:34 +01:00
ruff_text_size [ty] Add environment variable to dump Salsa memory usage stats (#18928) 2025-06-26 21:27:51 +00:00
ruff_wasm Bump 0.12.7 (#19627) 2025-07-29 18:18:42 -04:00
ruff_workspace Add support for specifying minimum dots in detected string imports (#19538) 2025-07-24 15:48:23 -04:00
ty Move concise diagnostic rendering to ruff_db (#19398) 2025-07-23 11:43:32 -04:00
ty_ide [ty] Remove offset from CompletionTargetTokens::Unknown 2025-07-29 14:49:20 -04:00
ty_project [ty] Remove AssertUnwindSafe requirement from ProgressReporter (#19637) 2025-07-30 12:46:44 +00:00
ty_python_semantic [ty] Upcast heterogeneous and mixed tuples to homogeneous tuples where it's necessary to solve a TypeVar (#19635) 2025-07-30 17:12:21 +01:00
ty_server [ty] Fix server panic in workspace diagnostics request handler when typing (#19631) 2025-07-30 16:40:42 +01:00
ty_static [ty] Merge ty_macros into ruff_macros (#19229) 2025-07-09 11:28:21 +00:00
ty_test [ty] Track open files in the server (#19264) 2025-07-18 19:33:35 +05:30
ty_vendored [ty] Sync vendored typeshed stubs (#19607) 2025-07-28 22:06:33 +00:00
ty_wasm [ty] Support stdlib files in playground (#19557) 2025-07-26 19:33:38 +01:00