Enable nursery rules: 'redundant_clone', 'debug_assert_with_mut_call', and 'unused_peekable' (#13920)

Cargo.toml

@@ -202,6 +202,10 @@ get_unwrap = "warn"
 rc_buffer = "warn"
 rc_mutex = "warn"
 rest_pat_in_fully_bound_structs = "warn"
+# nursery rules
+redundant_clone = "warn"
+debug_assert_with_mut_call = "warn"
+unused_peekable = "warn"
 
 [profile.release]
 # Note that we set these explicitly, and these values

crates/red_knot/src/main.rs

@@ -144,7 +144,7 @@ pub fn main() -> ExitStatus {
 }
 
 fn run() -> anyhow::Result<ExitStatus> {
-    let args = Args::parse_from(std::env::args().collect::<Vec<_>>());
+    let args = Args::parse_from(std::env::args());
 
     if matches!(args.command, Some(Command::Server)) {
         return run_server().map(|()| ExitStatus::Success);

crates/red_knot_python_semantic/src/ast_node_ref.rs

@@ -132,7 +132,7 @@ mod tests {
     #[test]
     fn inequality() {
         let parsed_raw = parse_unchecked_source("1 + 2", PySourceType::Python);
-        let parsed = ParsedModule::new(parsed_raw.clone());
+        let parsed = ParsedModule::new(parsed_raw);
 
         let stmt = &parsed.syntax().body[0];
         let node = unsafe { AstNodeRef::new(parsed.clone(), stmt) };
@@ -150,7 +150,7 @@ mod tests {
     #[allow(unsafe_code)]
     fn debug() {
         let parsed_raw = parse_unchecked_source("1 + 2", PySourceType::Python);
-        let parsed = ParsedModule::new(parsed_raw.clone());
+        let parsed = ParsedModule::new(parsed_raw);
 
         let stmt = &parsed.syntax().body[0];
 

crates/red_knot_python_semantic/src/module_resolver/resolver.rs

@@ -1294,7 +1294,7 @@ mod tests {
                 search_paths: SearchPathSettings {
                     extra_paths: vec![],
                     src_root: src.clone(),
-                    custom_typeshed: Some(custom_typeshed.clone()),
+                    custom_typeshed: Some(custom_typeshed),
                     site_packages: SitePackages::Known(vec![site_packages]),
                 },
             },
@@ -1445,7 +1445,7 @@ mod tests {
         assert_function_query_was_not_run(
             &db,
             resolve_module_query,
-            ModuleNameIngredient::new(&db, functools_module_name.clone()),
+            ModuleNameIngredient::new(&db, functools_module_name),
             &events,
         );
         assert_eq!(functools_module.search_path(), &stdlib);

crates/red_knot_python_semantic/src/semantic_index/definition.rs

@@ -296,7 +296,7 @@ impl DefinitionNodeRef<'_> {
                 handler,
                 is_star,
             }) => DefinitionKind::ExceptHandler(ExceptHandlerDefinitionKind {
-                handler: AstNodeRef::new(parsed.clone(), handler),
+                handler: AstNodeRef::new(parsed, handler),
                 is_star,
             }),
         }

crates/red_knot_python_semantic/src/util/subscript.rs

@@ -18,6 +18,7 @@ impl<I, T: DoubleEndedIterator<Item = I>> PythonSubscript for T {
 }
 
 #[cfg(test)]
+#[allow(clippy::redundant_clone)]
 mod tests {
     use super::PythonSubscript;
 

crates/red_knot_server/src/server/api/notifications/did_open_notebook.rs

@@ -37,7 +37,7 @@ impl SyncNotificationHandler for DidOpenNotebookHandler {
             params.cell_text_documents,
         )
         .with_failure_code(ErrorCode::InternalError)?;
-        session.open_notebook_document(params.notebook_document.uri.clone(), notebook);
+        session.open_notebook_document(params.notebook_document.uri, notebook);
 
         match path {
             AnySystemPath::System(path) => {

crates/red_knot_wasm/src/lib.rs

@@ -110,14 +110,14 @@ impl Workspace {
     pub fn check_file(&self, file_id: &FileHandle) -> Result<Vec<String>, Error> {
         let result = self.db.check_file(file_id.file).map_err(into_error)?;
 
-        Ok(result.clone())
+        Ok(result)
     }
 
     /// Checks all open files
     pub fn check(&self) -> Result<Vec<String>, Error> {
         let result = self.db.check().map_err(into_error)?;
 
-        Ok(result.clone())
+        Ok(result)
     }
 
     /// Returns the parsed AST for `path`

crates/ruff_linter/src/rules/eradicate/rules/commented_out_code.rs

@@ -88,7 +88,7 @@ where
     let line_end = locator.full_line_end(script_start.end());
     let rest = locator.after(line_end);
     let mut end_offset = None;
-    let mut lines = UniversalNewlineIterator::with_offset(rest, line_end).peekable();
+    let mut lines = UniversalNewlineIterator::with_offset(rest, line_end);
 
     while let Some(line) = lines.next() {
         let Some(content) = script_line_content(&line) else {

crates/ruff_linter/src/rules/pydocstyle/rules/sections.rs

@@ -1850,7 +1850,7 @@ static GOOGLE_ARGS_REGEX: LazyLock<Regex> =
     LazyLock::new(|| Regex::new(r"^\s*(\*?\*?\w+)\s*(\(.*?\))?\s*:(\r\n|\n)?\s*.+").unwrap());
 
 fn args_section(context: &SectionContext) -> FxHashSet<String> {
-    let mut following_lines = context.following_lines().peekable();
+    let mut following_lines = context.following_lines();
     let Some(first_line) = following_lines.next() else {
         return FxHashSet::default();
     };

crates/ruff_linter/src/rules/ruff/rules/test_rules.rs

@@ -122,10 +122,7 @@ impl TestRule for StableTestRuleSafeFix {
         } else {
             Some(
                 Diagnostic::new(StableTestRuleSafeFix, ruff_text_size::TextRange::default())
-                    .with_fix(Fix::safe_edit(Edit::insertion(
-                        comment.to_string(),
-                        TextSize::new(0),
-                    ))),
+                    .with_fix(Fix::safe_edit(Edit::insertion(comment, TextSize::new(0)))),
             )
         }
     }
@@ -169,10 +166,7 @@ impl TestRule for StableTestRuleUnsafeFix {
                     StableTestRuleUnsafeFix,
                     ruff_text_size::TextRange::default(),
                 )
-                .with_fix(Fix::unsafe_edit(Edit::insertion(
-                    comment.to_string(),
-                    TextSize::new(0),
-                ))),
+                .with_fix(Fix::unsafe_edit(Edit::insertion(comment, TextSize::new(0)))),
             )
         }
     }
@@ -217,7 +211,7 @@ impl TestRule for StableTestRuleDisplayOnlyFix {
                     ruff_text_size::TextRange::default(),
                 )
                 .with_fix(Fix::display_only_edit(Edit::insertion(
-                    comment.to_string(),
+                    comment,
                     TextSize::new(0),
                 ))),
             )

crates/ruff_macros/src/config.rs

@@ -60,15 +60,13 @@ pub(crate) fn derive_impl(input: DeriveInput) -> syn::Result<TokenStream> {
                 }
             }
 
-            let docs: Vec<&Attribute> = struct_attributes
+            let docs = struct_attributes
                 .iter()
-                .filter(|attr| attr.path().is_ident("doc"))
-                .collect();
+                .filter(|attr| attr.path().is_ident("doc"));
 
             // Convert the list of `doc` attributes into a single string.
             let doc = dedent(
                 &docs
-                    .into_iter()
                     .map(parse_doc)
                     .collect::<syn::Result<Vec<_>>>()?
                     .join("\n"),

crates/ruff_python_trivia/src/tokenizer.rs

@@ -30,7 +30,10 @@ pub fn find_only_token_in_range(
     let token = tokens.next().expect("Expected a token");
     debug_assert_eq!(token.kind(), token_kind);
     let mut tokens = tokens.skip_while(|token| token.kind == SimpleTokenKind::LParen);
-    debug_assert_eq!(tokens.next(), None);
+    #[allow(clippy::debug_assert_with_mut_call)]
+    {
+        debug_assert_eq!(tokens.next(), None);
+    }
     token
 }
 

crates/ruff_server/tests/notebook.rs

@@ -298,7 +298,7 @@ fn super_resolution_overview() {
             .unwrap();
     }
 
-    let snapshot = session.take_snapshot(file_url.clone()).unwrap();
+    let snapshot = session.take_snapshot(file_url).unwrap();
 
     insta::assert_snapshot!(
         "changed_notebook",

crates/ruff_workspace/src/configuration.rs

@@ -2029,11 +2029,11 @@ mod tests {
         assert_override(
             vec![
                 RuleSelection {
-                    select: Some(vec![d417.clone()]),
+                    select: Some(vec![d417]),
                     ..RuleSelection::default()
                 },
                 RuleSelection {
-                    extend_select: vec![d41.clone()],
+                    extend_select: vec![d41],
                     ..RuleSelection::default()
                 },
             ],