Move MSRV implementation to clippy_utils

Author: flip1995

clippy_config/src/conf.rs

@@ -1,10 +1,10 @@
 use crate::ClippyConfiguration;
-use crate::msrvs::Msrv;
 use crate::types::{
     DisallowedPath, MacroMatcher, MatchLintBehaviour, PubUnderscoreFieldsBehaviour, Rename, SourceItemOrdering,
     SourceItemOrderingCategory, SourceItemOrderingModuleItemGroupings, SourceItemOrderingModuleItemKind,
     SourceItemOrderingTraitAssocItemKind, SourceItemOrderingTraitAssocItemKinds,
 };
+use clippy_utils::msrvs::Msrv;
 use rustc_errors::Applicability;
 use rustc_session::Session;
 use rustc_span::edit_distance::edit_distance;

clippy_config/src/lib.rs

@@ -13,18 +13,12 @@
     rustc::untranslatable_diagnostic
 )]
 
-extern crate rustc_ast;
-extern crate rustc_attr;
-#[allow(unused_extern_crates)]
-extern crate rustc_driver;
 extern crate rustc_errors;
 extern crate rustc_session;
 extern crate rustc_span;
-extern crate smallvec;
 
 mod conf;
 mod metadata;
-pub mod msrvs;
 pub mod types;
 
 pub use conf::{Conf, get_configuration_metadata, lookup_conf_file, sanitize_explanation};

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"
+serde = { version = "1.0", features = ["derive"] }
 
 [package.metadata.rust-analyzer]
 # This crate uses #[feature(rustc_private)]

clippy_utils/src/lib.rs

@@ -50,6 +50,7 @@ extern crate rustc_session;
 extern crate rustc_span;
 extern crate rustc_target;
 extern crate rustc_trait_selection;
+extern crate smallvec;
 
 #[macro_use]
 pub mod sym_helper;
@@ -65,6 +66,7 @@ pub mod higher;
 mod hir_utils;
 pub mod macros;
 pub mod mir;
+pub mod msrvs;
 pub mod numeric_literal;
 pub mod paths;
 pub mod ptr;

clippy_config/src/msrvs.rs renamed to clippy_utils/src/msrvs.rs

@@ -36,7 +36,7 @@ pub const CHILD_KILL: [&str; 4] = ["std", "process", "Child", "kill"];
 pub const PANIC_ANY: [&str; 3] = ["std", "panic", "panic_any"];
 
 // Paths in clippy itself
-pub const MSRV: [&str; 3] = ["clippy_config", "msrvs", "Msrv"];
+pub const MSRV: [&str; 3] = ["clippy_utils", "msrvs", "Msrv"];
 
 // Paths in external crates
 #[expect(clippy::invalid_paths)] // internal lints do not know about all external crates

clippy_utils/src/paths.rs

@@ -3,7 +3,7 @@
 // of terminologies might not be relevant in the context of Clippy. Note that its behavior might
 // differ from the time of `rustc` even if the name stays the same.
 
-use clippy_config::msrvs::{self, Msrv};
+use crate::msrvs::{self, Msrv};
 use hir::LangItem;
 use rustc_attr::StableSince;
 use rustc_const_eval::check_consts::ConstCx;