include .pyw files by default when linting and formatting (#20458)

- Adds test cases exercising file selection by extension with
`--preview` enabled and disabled.
- Adds `INCLUDE_PREVIEW` with file patterns including `*.pyw`.
- In global preview mode, default configuration selects patterns from
`INCLUDE_PREVIEW`.
- Manually tested ruff server with local vscode for both formatting and
linting of a `.pyw` file.

Closes https://github.com/astral-sh/ruff/issues/13246

crates/ruff_workspace/src/configuration.rs

@@ -55,7 +55,8 @@ use crate::options::{
     PydoclintOptions, PydocstyleOptions, PyflakesOptions, PylintOptions, RuffOptions,
 };
 use crate::settings::{
-    EXCLUDE, FileResolverSettings, FormatterSettings, INCLUDE, LineEnding, Settings,
+    EXCLUDE, FileResolverSettings, FormatterSettings, INCLUDE, INCLUDE_PREVIEW, LineEnding,
+    Settings,
 };
 
 #[derive(Clone, Debug, Default)]
@@ -274,9 +275,14 @@ impl Configuration {
                 extend_exclude: FilePatternSet::try_from_iter(self.extend_exclude)?,
                 extend_include: FilePatternSet::try_from_iter(self.extend_include)?,
                 force_exclude: self.force_exclude.unwrap_or(false),
-                include: FilePatternSet::try_from_iter(
-                    self.include.unwrap_or_else(|| INCLUDE.to_vec()),
-                )?,
+                include: match global_preview {
+                    PreviewMode::Disabled => FilePatternSet::try_from_iter(
+                        self.include.unwrap_or_else(|| INCLUDE.to_vec()),
+                    )?,
+                    PreviewMode::Enabled => FilePatternSet::try_from_iter(
+                        self.include.unwrap_or_else(|| INCLUDE_PREVIEW.to_vec()),
+                    )?,
+                },
                 respect_gitignore: self.respect_gitignore.unwrap_or(true),
                 project_root: project_root.to_path_buf(),
             },

crates/ruff_workspace/src/options.rs

@@ -251,7 +251,7 @@ pub struct Options {
     ///
     /// For more information on the glob syntax, refer to the [`globset` documentation](https://docs.rs/globset/latest/globset/#syntax).
     #[option(
-        default = r#"["*.py", "*.pyi", "*.ipynb", "**/pyproject.toml"]"#,
+        default = r#"["*.py", "*.pyi", "*.pyw", "*.ipynb", "**/pyproject.toml"]"#,
         value_type = "list[str]",
         example = r#"
             include = ["*.py"]

crates/ruff_workspace/src/resolver.rs

@@ -427,7 +427,7 @@ impl From<ConfigurationOrigin> for Relativity {
     }
 }
 
-/// Find all Python (`.py`, `.pyi` and `.ipynb` files) in a set of paths.
+/// Find all Python (`.py`, `.pyi`, `.pyw`, and `.ipynb` files) in a set of paths.
 pub fn python_files_in_path<'a>(
     paths: &[PathBuf],
     pyproject_config: &'a PyprojectConfig,

crates/ruff_workspace/src/settings.rs

@@ -144,6 +144,13 @@ pub(crate) static INCLUDE: &[FilePattern] = &[
     FilePattern::Builtin("*.ipynb"),
     FilePattern::Builtin("**/pyproject.toml"),
 ];
+pub(crate) static INCLUDE_PREVIEW: &[FilePattern] = &[
+    FilePattern::Builtin("*.py"),
+    FilePattern::Builtin("*.pyi"),
+    FilePattern::Builtin("*.pyw"),
+    FilePattern::Builtin("*.ipynb"),
+    FilePattern::Builtin("**/pyproject.toml"),
+];
 
 impl FileResolverSettings {
     fn new(project_root: &Path) -> Self {