add configuration option for minimum supported rust version

add msrv attribute to  lints listed in #6097

Author: suyashb95

clippy_lints/src/lib.rs

@@ -915,7 +915,9 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     ]);
     // end register lints, do not remove this comment, it’s used in `update_lints`
 
-    store.register_late_pass(|| box await_holding_invalid::AwaitHolding);
+    let msrv = conf.msrv;
+
+    store.register_late_pass(|| box await_holding_lock::AwaitHoldingLock);
     store.register_late_pass(|| box serde_api::SerdeAPI);
     store.register_late_pass(|| box utils::internal_lints::CompilerLintFunctions::new());
     store.register_late_pass(|| box utils::internal_lints::LintWithoutLintPass::default());
@@ -950,7 +952,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| box strings::StringAdd);
     store.register_late_pass(|| box implicit_return::ImplicitReturn);
     store.register_late_pass(|| box implicit_saturating_sub::ImplicitSaturatingSub);
-    store.register_late_pass(|| box methods::Methods);
+    store.register_late_pass(|| box methods::Methods::new(msrv));
     store.register_late_pass(|| box map_clone::MapClone);
     store.register_late_pass(|| box map_err_ignore::MapErrIgnore);
     store.register_late_pass(|| box shadow::Shadow);
@@ -964,7 +966,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| box types::Casts);
     let type_complexity_threshold = conf.type_complexity_threshold;
     store.register_late_pass(move || box types::TypeComplexity::new(type_complexity_threshold));
-    store.register_late_pass(|| box matches::Matches::default());
+    store.register_late_pass(|| box matches::Matches { msrv: msrv, ..Default::default() });
     store.register_late_pass(|| box minmax::MinMaxPass);
     store.register_late_pass(|| box open_options::OpenOptions);
     store.register_late_pass(|| box zero_div_zero::ZeroDiv);
@@ -1123,7 +1125,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| box if_let_mutex::IfLetMutex);
     store.register_late_pass(|| box mut_mutex_lock::MutMutexLock);
     store.register_late_pass(|| box match_on_vec_items::MatchOnVecItems);
-    store.register_early_pass(|| box manual_non_exhaustive::ManualNonExhaustive);
+    store.register_early_pass(|| box manual_non_exhaustive::ManualNonExhaustive::new(msrv));
     store.register_late_pass(|| box manual_async_fn::ManualAsyncFn);
     store.register_early_pass(|| box redundant_field_names::RedundantFieldNames);
     store.register_late_pass(|| box vec_resize_to_zero::VecResizeToZero);
@@ -1144,7 +1146,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| box manual_unwrap_or::ManualUnwrapOr);
     store.register_late_pass(|| box float_equality_without_abs::FloatEqualityWithoutAbs);
     store.register_late_pass(|| box async_yields_async::AsyncYieldsAsync);
-    store.register_late_pass(|| box manual_strip::ManualStrip);
+    store.register_late_pass(|| box manual_strip::ManualStrip::new(msrv));
     store.register_late_pass(|| box utils::internal_lints::MatchTypeOnDiagItem);
     let disallowed_methods = conf.disallowed_methods.iter().cloned().collect::<FxHashSet<_>>();
     store.register_late_pass(move || box disallowed_method::DisallowedMethod::new(&disallowed_methods));

clippy_lints/src/manual_non_exhaustive.rs

@@ -4,10 +4,9 @@ use rustc_ast::ast::{Attribute, Item, ItemKind, StructField, Variant, VariantDat
 use rustc_attr as attr;
 use rustc_errors::Applicability;
 use rustc_lint::{EarlyContext, EarlyLintPass};
-use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_session::{impl_lint_pass, declare_tool_lint};
 use rustc_span::Span;
 
-const MSRV: &str = "1.40";
 
 declare_clippy_lint! {
     /// **What it does:** Checks for manual implementations of the non-exhaustive pattern.
@@ -57,7 +56,18 @@ declare_clippy_lint! {
     "manual implementations of the non-exhaustive pattern can be simplified using #[non_exhaustive]"
 }
 
-declare_lint_pass!(ManualNonExhaustive => [MANUAL_NON_EXHAUSTIVE]);
+pub struct ManualNonExhaustive {
+    msrv: Option<String>,
+}
+
+impl ManualNonExhaustive {
+    #[must_use]
+    pub fn new(msrv: Option<String>) -> Self {
+        Self { msrv }
+    }
+}
+
+impl_lint_pass!(ManualNonExhaustive => [MANUAL_NON_EXHAUSTIVE]);
 
 impl EarlyLintPass for ManualNonExhaustive {
     fn check_item(&mut self, cx: &EarlyContext<'_>, item: &Item) {

clippy_lints/src/manual_strip.rs

@@ -13,11 +13,10 @@ use rustc_hir::{BorrowKind, Expr, ExprKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::hir::map::Map;
 use rustc_middle::ty;
-use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_session::{impl_lint_pass, declare_tool_lint};
 use rustc_span::source_map::Spanned;
 use rustc_span::Span;
 
-const MSRV: &str = "1.45";
 
 declare_clippy_lint! {
     /// **What it does:**
@@ -53,7 +52,18 @@ declare_clippy_lint! {
     "suggests using `strip_{prefix,suffix}` over `str::{starts,ends}_with` and slicing"
 }
 
-declare_lint_pass!(ManualStrip => [MANUAL_STRIP]);
+pub struct ManualStrip {
+    msrv: Option<String>,
+}
+
+impl ManualStrip {
+    #[must_use]
+    pub fn new(msrv: Option<String>) -> Self {
+        Self { msrv }
+    }
+}
+
+impl_lint_pass!(ManualStrip => [MANUAL_STRIP]);
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 enum StripKind {

clippy_lints/src/matches.rs

@@ -522,6 +522,7 @@ declare_clippy_lint! {
 #[derive(Default)]
 pub struct Matches {
     infallible_destructuring_match_linted: bool,
+    msrv: Option<String>
 }
 
 impl_lint_pass!(Matches => [

clippy_lints/src/methods/mod.rs

@@ -20,7 +20,7 @@ use rustc_lint::{LateContext, LateLintPass, Lint, LintContext};
 use rustc_middle::hir::map::Map;
 use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty::{self, TraitRef, Ty, TyS};
-use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_session::{impl_lint_pass, declare_tool_lint};
 use rustc_span::source_map::Span;
 use rustc_span::symbol::{sym, SymbolStr};
 
@@ -1383,7 +1383,18 @@ declare_clippy_lint! {
     "using unnecessary lazy evaluation, which can be replaced with simpler eager evaluation"
 }
 
-declare_lint_pass!(Methods => [
+pub struct Methods {
+    msrv: Option<String>,
+}
+
+impl Methods {
+    #[must_use]
+    pub fn new(msrv: Option<String>) -> Self {
+        Self { msrv }
+    }
+}
+
+impl_lint_pass!(Methods => [
     UNWRAP_USED,
     EXPECT_USED,
     SHOULD_IMPLEMENT_TRAIT,

clippy_lints/src/utils/conf.rs

@@ -106,6 +106,9 @@ macro_rules! define_Conf {
 
 pub use self::helpers::Conf;
 define_Conf! {
+    /// Lints: MANUAL_NON_EXHAUSTIVE, MANUAL_STRIP, OPTION_AS_REF_DEREF, MATCH_LIKE_MATCHES_MACRO. The minimum rust version 
+    /// that the project supports
+    (msrv, "msrv": Option<String>, None),
     /// Lint: BLACKLISTED_NAME. The list of blacklisted names to lint about. NB: `bar` is not here since it has legitimate uses
     (blacklisted_names, "blacklisted_names": Vec<String>, ["foo", "baz", "quux"].iter().map(ToString::to_string).collect()),
     /// Lint: COGNITIVE_COMPLEXITY. The maximum cognitive complexity a function can have