Rollup merge of rust-lang#5505 - flip1995:avoid_running_lints, r=matthiaskrgr

Avoid running cargo+internal lints when not enabled

r? @matthiaskrgr

changelog: none

Author: flip1995

clippy_lints/src/cargo_common_metadata.rs

@@ -2,9 +2,9 @@
 
 use std::path::PathBuf;
 
-use crate::utils::span_lint;
-use rustc_ast::ast::Crate;
-use rustc_lint::{EarlyContext, EarlyLintPass};
+use crate::utils::{run_lints, span_lint};
+use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
+use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::DUMMY_SP;
 
@@ -35,11 +35,11 @@ declare_clippy_lint! {
     "common metadata is defined in `Cargo.toml`"
 }
 
-fn warning(cx: &EarlyContext<'_>, message: &str) {
+fn warning(cx: &LateContext<'_, '_>, message: &str) {
     span_lint(cx, CARGO_COMMON_METADATA, DUMMY_SP, message);
 }
 
-fn missing_warning(cx: &EarlyContext<'_>, package: &cargo_metadata::Package, field: &str) {
+fn missing_warning(cx: &LateContext<'_, '_>, package: &cargo_metadata::Package, field: &str) {
     let message = format!("package `{}` is missing `{}` metadata", package.name, field);
     warning(cx, &message);
 }
@@ -59,8 +59,12 @@ fn is_empty_vec(value: &[String]) -> bool {
 
 declare_lint_pass!(CargoCommonMetadata => [CARGO_COMMON_METADATA]);
 
-impl EarlyLintPass for CargoCommonMetadata {
-    fn check_crate(&mut self, cx: &EarlyContext<'_>, _: &Crate) {
+impl LateLintPass<'_, '_> for CargoCommonMetadata {
+    fn check_crate(&mut self, cx: &LateContext<'_, '_>, _: &Crate<'_>) {
+        if !run_lints(cx, &[CARGO_COMMON_METADATA], CRATE_HIR_ID) {
+            return;
+        }
+
         let metadata = if let Ok(metadata) = cargo_metadata::MetadataCommand::new().no_deps().exec() {
             metadata
         } else {

clippy_lints/src/lib.rs

@@ -1024,9 +1024,9 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_early_pass(|| box precedence::Precedence);
     store.register_early_pass(|| box needless_continue::NeedlessContinue);
     store.register_early_pass(|| box redundant_static_lifetimes::RedundantStaticLifetimes);
-    store.register_early_pass(|| box cargo_common_metadata::CargoCommonMetadata);
-    store.register_early_pass(|| box multiple_crate_versions::MultipleCrateVersions);
-    store.register_early_pass(|| box wildcard_dependencies::WildcardDependencies);
+    store.register_late_pass(|| box cargo_common_metadata::CargoCommonMetadata);
+    store.register_late_pass(|| box multiple_crate_versions::MultipleCrateVersions);
+    store.register_late_pass(|| box wildcard_dependencies::WildcardDependencies);
     store.register_early_pass(|| box literal_representation::LiteralDigitGrouping);
     let literal_representation_threshold = conf.literal_representation_threshold;
     store.register_early_pass(move || box literal_representation::DecimalLiteralRepresentation::new(literal_representation_threshold));

clippy_lints/src/multiple_crate_versions.rs

@@ -1,8 +1,8 @@
 //! lint on multiple versions of a crate being used
 
-use crate::utils::span_lint;
-use rustc_ast::ast::Crate;
-use rustc_lint::{EarlyContext, EarlyLintPass};
+use crate::utils::{run_lints, span_lint};
+use rustc_hir::{Crate, CRATE_HIR_ID};
+use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::DUMMY_SP;
 
@@ -33,8 +33,12 @@ declare_clippy_lint! {
 
 declare_lint_pass!(MultipleCrateVersions => [MULTIPLE_CRATE_VERSIONS]);
 
-impl EarlyLintPass for MultipleCrateVersions {
-    fn check_crate(&mut self, cx: &EarlyContext<'_>, _: &Crate) {
+impl LateLintPass<'_, '_> for MultipleCrateVersions {
+    fn check_crate(&mut self, cx: &LateContext<'_, '_>, _: &Crate<'_>) {
+        if !run_lints(cx, &[MULTIPLE_CRATE_VERSIONS], CRATE_HIR_ID) {
+            return;
+        }
+
         let metadata = if let Ok(metadata) = cargo_metadata::MetadataCommand::new().exec() {
             metadata
         } else {

clippy_lints/src/utils/internal_lints.rs

@@ -1,7 +1,7 @@
 use crate::utils::SpanlessEq;
 use crate::utils::{
-    is_expn_of, match_def_path, match_qpath, match_type, method_calls, paths, snippet, span_lint, span_lint_and_help,
-    span_lint_and_sugg, walk_ptrs_ty,
+    is_expn_of, match_def_path, match_qpath, match_type, method_calls, paths, run_lints, snippet, span_lint,
+    span_lint_and_help, span_lint_and_sugg, walk_ptrs_ty,
 };
 use if_chain::if_chain;
 use rustc_ast::ast::{Crate as AstCrate, ItemKind, LitKind, Name, NodeId};
@@ -10,7 +10,8 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::intravisit::{walk_expr, NestedVisitorMap, Visitor};
+use rustc_hir::hir_id::CRATE_HIR_ID;
+use rustc_hir::intravisit::{NestedVisitorMap, Visitor};
 use rustc_hir::{Crate, Expr, ExprKind, HirId, Item, MutTy, Mutability, Path, StmtKind, Ty, TyKind};
 use rustc_lint::{EarlyContext, EarlyLintPass, LateContext, LateLintPass};
 use rustc_middle::hir::map::Map;
@@ -252,6 +253,10 @@ impl_lint_pass!(LintWithoutLintPass => [DEFAULT_LINT, LINT_WITHOUT_LINT_PASS]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LintWithoutLintPass {
     fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
+        if !run_lints(cx, &[DEFAULT_LINT], item.hir_id) {
+            return;
+        }
+
         if let hir::ItemKind::Static(ref ty, Mutability::Not, body_id) = item.kind {
             if is_lint_ref_type(cx, ty) {
                 let expr = &cx.tcx.hir().body(body_id).value;
@@ -306,6 +311,10 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LintWithoutLintPass {
     }
 
     fn check_crate_post(&mut self, cx: &LateContext<'a, 'tcx>, _: &'tcx Crate<'_>) {
+        if !run_lints(cx, &[LINT_WITHOUT_LINT_PASS], CRATE_HIR_ID) {
+            return;
+        }
+
         for (lint_name, &lint_span) in &self.declared_lints {
             // When using the `declare_tool_lint!` macro, the original `lint_span`'s
             // file points to "<rustc macros>".
@@ -355,15 +364,12 @@ struct LintCollector<'a, 'tcx> {
 impl<'a, 'tcx> Visitor<'tcx> for LintCollector<'a, 'tcx> {
     type Map = Map<'tcx>;
 
-    fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
-        walk_expr(self, expr);
-    }
-
     fn visit_path(&mut self, path: &'tcx Path<'_>, _: HirId) {
         if path.segments.len() == 1 {
             self.output.insert(path.segments[0].ident.name);
         }
     }
+
     fn nested_visit_map(&mut self) -> NestedVisitorMap<Self::Map> {
         NestedVisitorMap::All(self.cx.tcx.hir())
     }
@@ -391,6 +397,10 @@ impl_lint_pass!(CompilerLintFunctions => [COMPILER_LINT_FUNCTIONS]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CompilerLintFunctions {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr<'_>) {
+        if !run_lints(cx, &[COMPILER_LINT_FUNCTIONS], expr.hir_id) {
+            return;
+        }
+
         if_chain! {
             if let ExprKind::MethodCall(ref path, _, ref args) = expr.kind;
             let fn_name = path.ident;
@@ -416,6 +426,10 @@ declare_lint_pass!(OuterExpnDataPass => [OUTER_EXPN_EXPN_DATA]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for OuterExpnDataPass {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx hir::Expr<'_>) {
+        if !run_lints(cx, &[OUTER_EXPN_EXPN_DATA], expr.hir_id) {
+            return;
+        }
+
         let (method_names, arg_lists, spans) = method_calls(expr, 2);
         let method_names: Vec<SymbolStr> = method_names.iter().map(|s| s.as_str()).collect();
         let method_names: Vec<&str> = method_names.iter().map(|s| &**s).collect();
@@ -462,6 +476,10 @@ declare_lint_pass!(CollapsibleCalls => [COLLAPSIBLE_SPAN_LINT_CALLS]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CollapsibleCalls {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx hir::Expr<'_>) {
+        if !run_lints(cx, &[COLLAPSIBLE_SPAN_LINT_CALLS], expr.hir_id) {
+            return;
+        }
+
         if_chain! {
             if let ExprKind::Call(ref func, ref and_then_args) = expr.kind;
             if let ExprKind::Path(ref path) = func.kind;

clippy_lints/src/utils/mod.rs

@@ -1399,6 +1399,15 @@ pub fn fn_has_unsatisfiable_preds(cx: &LateContext<'_, '_>, did: DefId) -> bool
     )
 }
 
+pub fn run_lints(cx: &LateContext<'_, '_>, lints: &[&'static Lint], id: HirId) -> bool {
+    lints.iter().any(|lint| {
+        matches!(
+            cx.tcx.lint_level_at_node(lint, id),
+            (Level::Forbid | Level::Deny | Level::Warn, _)
+        )
+    })
+}
+
 #[cfg(test)]
 mod test {
     use super::{trim_multiline, without_block_comments};

clippy_lints/src/wildcard_dependencies.rs

@@ -1,6 +1,6 @@
-use crate::utils::span_lint;
-use rustc_ast::ast::Crate;
-use rustc_lint::{EarlyContext, EarlyLintPass};
+use crate::utils::{run_lints, span_lint};
+use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
+use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::source_map::DUMMY_SP;
 
@@ -28,8 +28,12 @@ declare_clippy_lint! {
 
 declare_lint_pass!(WildcardDependencies => [WILDCARD_DEPENDENCIES]);
 
-impl EarlyLintPass for WildcardDependencies {
-    fn check_crate(&mut self, cx: &EarlyContext<'_>, _: &Crate) {
+impl LateLintPass<'_, '_> for WildcardDependencies {
+    fn check_crate(&mut self, cx: &LateContext<'_, '_>, _: &Crate<'_>) {
+        if !run_lints(cx, &[WILDCARD_DEPENDENCIES], CRATE_HIR_ID) {
+            return;
+        }
+
         let metadata = if let Ok(metadata) = cargo_metadata::MetadataCommand::new().no_deps().exec() {
             metadata
         } else {