Turn declare_clippy_lint into a common macro

Author: blyxyas

clippy_lints/Cargo.toml

@@ -13,7 +13,6 @@ arrayvec = { version = "0.7", default-features = false }
 cargo_metadata = "0.18"
 clippy_config = { path = "../clippy_config" }
 clippy_utils = { path = "../clippy_utils" }
-declare_clippy_lint = { path = "../declare_clippy_lint" }
 itertools = "0.12"
 quine-mc_cluskey = "0.2"
 regex-syntax = "0.8"

clippy_lints/src/lib.rs

@@ -60,8 +60,6 @@ extern crate thin_vec;
 
 #[macro_use]
 extern crate clippy_utils;
-#[macro_use]
-extern crate declare_clippy_lint;
 
 #[cfg_attr(feature = "internal", allow(clippy::missing_clippy_version_attribute))]
 mod utils;

clippy_utils/Cargo.toml

@@ -10,6 +10,7 @@ arrayvec = { version = "0.7", default-features = false }
 itertools = "0.12"
 # FIXME(f16_f128): remove when no longer needed for parsing
 rustc_apfloat = "0.2.0"
+paste = "1.0.15"
 
 [package.metadata.rust-analyzer]
 # This crate uses #[feature(rustc_private)]

clippy_utils/src/declare_clippy_lint.rs

@@ -0,0 +1,176 @@
+// warn on lints, that are included in `rust-lang/rust`s bootstrap
+#![warn(rust_2018_idioms, unused_lifetimes)]
+
+pub use paste;
+
+#[macro_export]
+macro_rules! declare_clippy_lint {
+    (@
+        // $(#[$($attrss:tt)*])*
+        $(#[doc = $lit:literal])*
+        pub $lint_name:ident,
+        $category:ident,
+        $lintcategory:expr,
+        $desc:literal,
+        $version_expr:expr,
+        $version_lit:literal
+    ) => {
+        rustc_session::declare_tool_lint! {
+        $(#[doc = $lit])*
+        #[clippy::version = $version_lit]
+            pub clippy::$lint_name,$category,$desc,
+            report_in_external_macro:true
+        }
+
+        $crate::paste::paste! {
+            pub(crate) static [< $lint_name _INFO >]: &'static crate::LintInfo = &crate::LintInfo {
+                lint: &$lint_name,
+                category:  $lintcategory,
+                explanation: concat!($($lit,"\n",)*),
+                location: concat!(file!(), "#L", line!()),
+                version: $version_expr
+            };
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        restriction,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name,Allow, crate::LintCategory::Restriction,$desc,
+            declare_clippy_lint!(__version = $version), $version
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        style,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name, Warn, crate::LintCategory::Style,$desc,
+            declare_clippy_lint!(__version = $version), $version
+
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        correctness,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name,Deny, crate::LintCategory::Correctness,$desc,
+            declare_clippy_lint!(__version = $version), $version
+
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        perf,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name, Warn, crate::LintCategory::Perf,$desc,
+                        declare_clippy_lint!(__version = $version), $version
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        complexity,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+                pub $lint_name, Warn, crate::LintCategory::Complexity,$desc,
+                declare_clippy_lint!(__version = $version), $version
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        suspicious,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+                pub $lint_name, Warn, crate::LintCategory::Suspicious,$desc,
+                declare_clippy_lint!(__version = $version), $version
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        nursery,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name,Allow, crate::LintCategory::Nursery,$desc,
+                        declare_clippy_lint!(__version = $version), $version
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        pedantic,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name,Allow, crate::LintCategory::Pedantic,$desc,
+                        declare_clippy_lint!(__version = $version), $version
+        }
+    };
+    (
+        $(#[doc = $lit:literal])*
+        #[clippy::version = $version:literal]
+        pub $lint_name:ident,
+        cargo,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name,Allow, crate::LintCategory::Cargo,$desc,
+                        declare_clippy_lint!(__version = $version), $version
+        }
+    };
+
+    (
+        $(#[doc = $lit:literal])*
+        $(#[clippy::version = $version:literal])?
+        pub $lint_name:ident,
+        internal,
+        $desc:literal
+    ) => {
+        declare_clippy_lint! {@
+            $(#[doc = $lit])*
+            pub $lint_name,Allow, crate::LintCategory::Internal,$desc,
+            declare_clippy_lint!(__version = $($version)?), "0.0.0"
+        }
+    };
+
+    // VERSION HANDLING
+    (__version = ) => {
+        None
+    };
+    (__version = $version:literal) => {
+        Some($version)
+    };
+}

clippy_utils/src/lib.rs

@@ -58,6 +58,7 @@ pub mod attrs;
 mod check_proc_macro;
 pub mod comparisons;
 pub mod consts;
+pub mod declare_clippy_lint;
 pub mod diagnostics;
 pub mod eager_or_lazy;
 pub mod higher;
@@ -130,6 +131,9 @@ use crate::higher::Range;
 use crate::ty::{adt_and_variant_of_res, can_partially_move_ty, expr_sig, is_copy, is_recursively_primitive_type};
 use crate::visitors::for_each_expr_without_closures;
 
+#[doc(hidden)]
+pub use paste;
+
 use rustc_middle::hir::nested_filter;
 
 #[macro_export]