Deprecate unknown_clippy_lints

This is now handled by unknown_lints

Author: flip1995

clippy_lints/src/attrs.rs

@@ -10,11 +10,10 @@ use rustc_errors::Applicability;
 use rustc_hir::{
     Block, Expr, ExprKind, ImplItem, ImplItemKind, Item, ItemKind, StmtKind, TraitFn, TraitItem, TraitItemKind,
 };
-use rustc_lint::{CheckLintNameResult, EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
+use rustc_lint::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
 use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::lev_distance::find_best_match_for_name;
 use rustc_span::source_map::Span;
 use rustc_span::sym;
 use rustc_span::symbol::{Symbol, SymbolStr};
@@ -156,33 +155,6 @@ declare_clippy_lint! {
     "empty line after outer attribute"
 }
 
-declare_clippy_lint! {
-    /// **What it does:** Checks for `allow`/`warn`/`deny`/`forbid` attributes with scoped clippy
-    /// lints and if those lints exist in clippy. If there is an uppercase letter in the lint name
-    /// (not the tool name) and a lowercase version of this lint exists, it will suggest to lowercase
-    /// the lint name.
-    ///
-    /// **Why is this bad?** A lint attribute with a mistyped lint name won't have an effect.
-    ///
-    /// **Known problems:** None.
-    ///
-    /// **Example:**
-    /// Bad:
-    /// ```rust
-    /// #![warn(if_not_els)]
-    /// #![deny(clippy::All)]
-    /// ```
-    ///
-    /// Good:
-    /// ```rust
-    /// #![warn(if_not_else)]
-    /// #![deny(clippy::all)]
-    /// ```
-    pub UNKNOWN_CLIPPY_LINTS,
-    style,
-    "unknown_lints for scoped Clippy lints"
-}
-
 declare_clippy_lint! {
     /// **What it does:** Checks for `warn`/`deny`/`forbid` attributes targeting the whole clippy::restriction category.
     ///
@@ -272,7 +244,6 @@ declare_lint_pass!(Attributes => [
     INLINE_ALWAYS,
     DEPRECATED_SEMVER,
     USELESS_ATTRIBUTE,
-    UNKNOWN_CLIPPY_LINTS,
     BLANKET_CLIPPY_RESTRICTION_LINTS,
 ]);
 
@@ -409,48 +380,9 @@ fn extract_clippy_lint(lint: &NestedMetaItem) -> Option<SymbolStr> {
 }
 
 fn check_clippy_lint_names(cx: &LateContext<'_>, ident: &str, items: &[NestedMetaItem]) {
-    let lint_store = cx.lints();
     for lint in items {
         if let Some(lint_name) = extract_clippy_lint(lint) {
-            if let CheckLintNameResult::Tool(Err((None, _))) = lint_store.check_lint_name(&lint_name, Some(sym::clippy))
-            {
-                span_lint_and_then(
-                    cx,
-                    UNKNOWN_CLIPPY_LINTS,
-                    lint.span(),
-                    &format!("unknown clippy lint: clippy::{}", lint_name),
-                    |diag| {
-                        let name_lower = lint_name.to_lowercase();
-                        let symbols = lint_store
-                            .get_lints()
-                            .iter()
-                            .map(|l| Symbol::intern(&l.name_lower()))
-                            .collect::<Vec<_>>();
-                        let sugg = find_best_match_for_name(
-                            &symbols,
-                            Symbol::intern(&format!("clippy::{}", name_lower)),
-                            None,
-                        );
-                        if lint_name.chars().any(char::is_uppercase)
-                            && lint_store.find_lints(&format!("clippy::{}", name_lower)).is_ok()
-                        {
-                            diag.span_suggestion(
-                                lint.span(),
-                                "lowercase the lint name",
-                                format!("clippy::{}", name_lower),
-                                Applicability::MachineApplicable,
-                            );
-                        } else if let Some(sugg) = sugg {
-                            diag.span_suggestion(
-                                lint.span(),
-                                "did you mean",
-                                sugg.to_string(),
-                                Applicability::MachineApplicable,
-                            );
-                        }
-                    },
-                );
-            } else if lint_name == "restriction" && ident != "allow" {
+            if lint_name == "restriction" && ident != "allow" {
                 span_lint_and_help(
                     cx,
                     BLANKET_CLIPPY_RESTRICTION_LINTS,

clippy_lints/src/deprecated_lints.rs

@@ -163,6 +163,19 @@ declare_deprecated_lint! {
 }
 
 declare_deprecated_lint! {
+    /// **What it does:** Nothing. This lint has been deprecated.
+    ///
+    /// **Deprecation reason:** This lint has been uplifted to rustc and is now called
+    /// `panic_fmt`.
     pub PANIC_PARAMS,
     "this lint has been uplifted to rustc and is now called `panic_fmt`"
 }
+
+declare_deprecated_lint! {
+    /// **What it does:** Nothing. This lint has been deprecated.
+    ///
+    /// **Deprecation reason:** This lint has been integrated into the `unknown_lints`
+    /// rustc lint.
+    pub UNKNOWN_CLIPPY_LINTS,
+    "this lint has been integrated into the `unknown_lints` rustc lint"
+}

clippy_lints/src/lib.rs

@@ -500,6 +500,10 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         "clippy::panic_params",
         "this lint has been uplifted to rustc and is now called `panic_fmt`",
     );
+    store.register_removed(
+        "clippy::unknown_clippy_lints",
+        "this lint has been integrated into the `unknown_lints` rustc lint",
+    );
     // end deprecated lints, do not remove this comment, it’s used in `update_lints`
 
     // begin register lints, do not remove this comment, it’s used in `update_lints`
@@ -541,7 +545,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         &attrs::EMPTY_LINE_AFTER_OUTER_ATTR,
         &attrs::INLINE_ALWAYS,
         &attrs::MISMATCHED_TARGET_OS,
-        &attrs::UNKNOWN_CLIPPY_LINTS,
         &attrs::USELESS_ATTRIBUTE,
         &await_holding_invalid::AWAIT_HOLDING_LOCK,
         &await_holding_invalid::AWAIT_HOLDING_REFCELL_REF,
@@ -1375,7 +1378,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&attrs::DEPRECATED_CFG_ATTR),
         LintId::of(&attrs::DEPRECATED_SEMVER),
         LintId::of(&attrs::MISMATCHED_TARGET_OS),
-        LintId::of(&attrs::UNKNOWN_CLIPPY_LINTS),
         LintId::of(&attrs::USELESS_ATTRIBUTE),
         LintId::of(&bit_mask::BAD_BIT_MASK),
         LintId::of(&bit_mask::INEFFECTIVE_BIT_MASK),
@@ -1650,7 +1652,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&assertions_on_constants::ASSERTIONS_ON_CONSTANTS),
         LintId::of(&assign_ops::ASSIGN_OP_PATTERN),
         LintId::of(&attrs::BLANKET_CLIPPY_RESTRICTION_LINTS),
-        LintId::of(&attrs::UNKNOWN_CLIPPY_LINTS),
         LintId::of(&blacklisted_name::BLACKLISTED_NAME),
         LintId::of(&blocks_in_if_conditions::BLOCKS_IN_IF_CONDITIONS),
         LintId::of(&collapsible_if::COLLAPSIBLE_IF),

tests/ui/deprecated.rs

@@ -9,5 +9,6 @@
 #[warn(clippy::drop_bounds)]
 #[warn(clippy::temporary_cstring_as_ptr)]
 #[warn(clippy::panic_params)]
+#[warn(clippy::unknown_clippy_lints)]
 
 fn main() {}

tests/ui/deprecated.stderr

@@ -66,11 +66,17 @@ error: lint `clippy::panic_params` has been removed: `this lint has been uplifte
 LL | #[warn(clippy::panic_params)]
    |        ^^^^^^^^^^^^^^^^^^^^
 
+error: lint `clippy::unknown_clippy_lints` has been removed: `this lint has been integrated into the `unknown_lints` rustc lint`
+  --> $DIR/deprecated.rs:12:8
+   |
+LL | #[warn(clippy::unknown_clippy_lints)]
+   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
 error: lint `clippy::unstable_as_slice` has been removed: ``Vec::as_slice` has been stabilized in 1.7`
   --> $DIR/deprecated.rs:1:8
    |
 LL | #[warn(clippy::unstable_as_slice)]
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 12 previous errors
+error: aborting due to 13 previous errors
 

tests/ui/unknown_clippy_lints.stderr

@@ -1,52 +1,58 @@
-error: unknown clippy lint: clippy::if_not_els
+error: unknown lint: `clippy::All`
+  --> $DIR/unknown_clippy_lints.rs:5:10
+   |
+LL | #![allow(clippy::All)]
+   |          ^^^^^^^^^^^ help: did you mean: `clippy::all`
+   |
+   = note: `-D unknown-lints` implied by `-D warnings`
+
+error: unknown lint: `clippy::CMP_NAN`
+  --> $DIR/unknown_clippy_lints.rs:6:9
+   |
+LL | #![warn(clippy::CMP_NAN)]
+   |         ^^^^^^^^^^^^^^^ help: did you mean: `clippy::cmp_nan`
+
+error: unknown lint: `clippy::if_not_els`
   --> $DIR/unknown_clippy_lints.rs:9:8
    |
 LL | #[warn(clippy::if_not_els)]
    |        ^^^^^^^^^^^^^^^^^^ help: did you mean: `clippy::if_not_else`
-   |
-   = note: `-D clippy::unknown-clippy-lints` implied by `-D warnings`
 
-error: unknown clippy lint: clippy::UNNecsaRy_cAst
+error: unknown lint: `clippy::UNNecsaRy_cAst`
   --> $DIR/unknown_clippy_lints.rs:10:8
    |
 LL | #[warn(clippy::UNNecsaRy_cAst)]
    |        ^^^^^^^^^^^^^^^^^^^^^^ help: did you mean: `clippy::unnecessary_cast`
 
-error: unknown clippy lint: clippy::useles_transute
+error: unknown lint: `clippy::useles_transute`
   --> $DIR/unknown_clippy_lints.rs:11:8
    |
 LL | #[warn(clippy::useles_transute)]
    |        ^^^^^^^^^^^^^^^^^^^^^^^ help: did you mean: `clippy::useless_transmute`
 
-error: unknown clippy lint: clippy::dead_cod
+error: unknown lint: `clippy::dead_cod`
   --> $DIR/unknown_clippy_lints.rs:13:8
    |
 LL | #[warn(clippy::dead_cod)]
    |        ^^^^^^^^^^^^^^^^ help: did you mean: `clippy::drop_copy`
 
-error: unknown clippy lint: clippy::unused_colle
+error: unknown lint: `clippy::unused_colle`
   --> $DIR/unknown_clippy_lints.rs:15:8
    |
 LL | #[warn(clippy::unused_colle)]
    |        ^^^^^^^^^^^^^^^^^^^^ help: did you mean: `clippy::unused_self`
 
-error: unknown clippy lint: clippy::const_static_lifetim
+error: unknown lint: `clippy::const_static_lifetim`
   --> $DIR/unknown_clippy_lints.rs:17:8
    |
 LL | #[warn(clippy::const_static_lifetim)]
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: did you mean: `clippy::redundant_static_lifetimes`
 
-error: unknown clippy lint: clippy::All
+error: unknown lint: `clippy::All`
   --> $DIR/unknown_clippy_lints.rs:5:10
    |
 LL | #![allow(clippy::All)]
-   |          ^^^^^^^^^^^ help: lowercase the lint name: `clippy::all`
-
-error: unknown clippy lint: clippy::CMP_NAN
-  --> $DIR/unknown_clippy_lints.rs:6:9
-   |
-LL | #![warn(clippy::CMP_NAN)]
-   |         ^^^^^^^^^^^^^^^ help: lowercase the lint name: `clippy::cmp_nan`
+   |          ^^^^^^^^^^^ help: did you mean: `clippy::all`
 
-error: aborting due to 8 previous errors
+error: aborting due to 9 previous errors