[ty] Allow overriding rules for specific files (#18648)

crates/ty_python_semantic/src/db.rs

@@ -7,7 +7,8 @@ use ruff_db::{Db as SourceDb, Upcast};
 pub trait Db: SourceDb + Upcast<dyn SourceDb> {
     fn is_file_open(&self, file: File) -> bool;
 
-    fn rule_selection(&self) -> &RuleSelection;
+    /// Resolves the rule selection for a given file.
+    fn rule_selection(&self, file: File) -> &RuleSelection;
 
     fn lint_registry(&self) -> &LintRegistry;
 }
@@ -126,7 +127,7 @@ pub(crate) mod tests {
             !file.path(self).is_vendored_path()
         }
 
-        fn rule_selection(&self) -> &RuleSelection {
+        fn rule_selection(&self, _file: File) -> &RuleSelection {
             &self.rule_selection
         }
 

crates/ty_python_semantic/src/lint.rs

@@ -32,7 +32,7 @@ pub struct LintMetadata {
     pub line: u32,
 }
 
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
 #[cfg_attr(
     feature = "serde",
     derive(serde::Serialize, serde::Deserialize),

crates/ty_python_semantic/src/python_platform.rs

@@ -1,10 +1,12 @@
 use std::fmt::{Display, Formatter};
 
+use ruff_macros::RustDoc;
+
 /// The target platform to assume when resolving types.
 #[derive(Debug, Clone, PartialEq, Eq)]
 #[cfg_attr(
     feature = "serde",
-    derive(serde::Serialize, serde::Deserialize),
+    derive(serde::Serialize, serde::Deserialize, RustDoc),
     serde(rename_all = "kebab-case")
 )]
 pub enum PythonPlatform {
@@ -57,6 +59,7 @@ impl Default for PythonPlatform {
 #[cfg(feature = "schemars")]
 mod schema {
     use crate::PythonPlatform;
+    use ruff_db::RustDoc;
     use schemars::_serde_json::Value;
     use schemars::JsonSchema;
     use schemars::r#gen::SchemaGenerator;
@@ -121,6 +124,10 @@ mod schema {
 
                     ..SubschemaValidation::default()
                 })),
+                metadata: Some(Box::new(Metadata {
+                    description: Some(<PythonPlatform as RustDoc>::rust_doc().to_string()),
+                    ..Metadata::default()
+                })),
 
                 ..SchemaObject::default()
             })

crates/ty_python_semantic/src/suppression.rs

@@ -290,7 +290,10 @@ impl<'a> CheckSuppressionsContext<'a> {
     }
 
     fn is_lint_disabled(&self, lint: &'static LintMetadata) -> bool {
-        !self.db.rule_selection().is_enabled(LintId::of(lint))
+        !self
+            .db
+            .rule_selection(self.file)
+            .is_enabled(LintId::of(lint))
     }
 
     fn report_lint(
@@ -315,7 +318,7 @@ impl<'a> CheckSuppressionsContext<'a> {
         range: TextRange,
         message: fmt::Arguments,
     ) {
-        let Some(severity) = self.db.rule_selection().severity(LintId::of(lint)) else {
+        let Some(severity) = self.db.rule_selection(self.file).severity(LintId::of(lint)) else {
             return;
         };
 

crates/ty_python_semantic/src/types/context.rs

@@ -401,7 +401,7 @@ impl<'db, 'ctx> LintDiagnosticGuardBuilder<'db, 'ctx> {
         let lint_id = LintId::of(lint);
         // Skip over diagnostics if the rule
         // is disabled.
-        let (severity, source) = ctx.db.rule_selection().get(lint_id)?;
+        let (severity, source) = ctx.db.rule_selection(ctx.file).get(lint_id)?;
         // If we're not in type checking mode,
         // we can bail now.
         if ctx.is_in_no_type_check() {