Metadata collection collecting configuration deprecation reason

2 files changed, 20 insertions, 8 deletions

diff --git a/clippy_lints/src/utils/conf.rs b/clippy_lints/src/utils/conf.rs
index 98b86f73a1f..25163bb9f37 100644
--- a/clippy_lints/src/utils/conf.rs
+++ b/clippy_lints/src/utils/conf.rs
@@ -97,11 +97,20 @@ macro_rules! define_Conf {
             pub(crate) fn get_configuration_metadata() -> Vec<ClippyConfigurationBasicInfo> {
                 vec![
                     $(
-                        ClippyConfigurationBasicInfo {
-                            name: stringify!($name),
-                            config_type: stringify!($ty),
-                            default: stringify!($default),
-                            doc_comment: $doc,
+                        {
+                            #[allow(unused_mut, unused_assignments)]
+                            let mut deprecation_reason = None;
+
+                            // only set if a deprecation reason was set
+                            $(deprecation_reason = Some(stringify!($dep));)?
+
+                            ClippyConfigurationBasicInfo {
+                                name: stringify!($name),
+                                config_type: stringify!($ty),
+                                default: stringify!($default),
+                                doc_comment: $doc,
+                                deprecation_reason,
+                            }
                         },
                     )+
                 ]
@@ -118,7 +127,7 @@ define_Conf! {
     (blacklisted_names: Vec<String> = ["foo", "baz", "quux"].iter().map(ToString::to_string).collect()),
     /// Lint: COGNITIVE_COMPLEXITY. The maximum cognitive complexity a function can have
     (cognitive_complexity_threshold: u64 = 25),
-    /// Lint: CYCLOMATIC_COMPLEXITY. Use the Cognitive Complexity lint instead.
+    /// DEPRECATED LINT: CYCLOMATIC_COMPLEXITY. Use the Cognitive Complexity lint instead.
     #[conf_deprecated("Please use `cognitive-complexity-threshold` instead")]
     (cyclomatic_complexity_threshold: Option<u64> = None),
     /// Lint: DOC_MARKDOWN. The list of words this lint should not consider as identifiers needing ticks
diff --git a/clippy_lints/src/utils/internal_lints/metadata_collector.rs b/clippy_lints/src/utils/internal_lints/metadata_collector.rs
index 4a8a46be041..bd0de8ad034 100644
--- a/clippy_lints/src/utils/internal_lints/metadata_collector.rs
+++ b/clippy_lints/src/utils/internal_lints/metadata_collector.rs
@@ -267,6 +267,7 @@ pub(crate) struct ClippyConfigurationBasicInfo {
     pub config_type: &'static str,
     pub default: &'static str,
     pub doc_comment: &'static str,
+    pub deprecation_reason: Option<&'static str>,
 }
 
 #[derive(Debug, Clone, Default)]
@@ -276,6 +277,7 @@ struct ClippyConfiguration {
     doc: String,
     config_type: &'static str,
     default: String,
+    deprecation_reason: Option<&'static str>,
 }
 
 fn collect_configs() -> Vec<ClippyConfiguration> {
@@ -291,18 +293,19 @@ fn collect_configs() -> Vec<ClippyConfiguration> {
                 doc,
                 config_type: x.config_type,
                 default: clarify_default(x.default),
+                deprecation_reason: x.deprecation_reason,
             }
         })
         .collect()
 }
 
 fn clarify_default(default: &'static str) -> String {
-    if let Some((_start, init))  = default.split_once('[') {
+    if let Some((_start, init)) = default.split_once('[') {
         if let Some((init, _end)) = init.split_once(']') {
             return format!("[{}]", init);
         }
     }
-    
+
     default.to_string()
 }