From 2aa763c803a79dae09ebb48a7abe4a0adc66c5a3 Mon Sep 17 00:00:00 2001
From: Tapan Prakash <tapanprakasht@gmail.com>
Date: Wed, 23 Oct 2024 21:35:01 +0530
Subject: [PATCH] feat(linter): warn unmatched rule names (#6782)

Fixes https://github.com/oxc-project/oxc/issues/6763
---
 crates/oxc_linter/src/config/rules.rs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/crates/oxc_linter/src/config/rules.rs b/crates/oxc_linter/src/config/rules.rs
index ae51d9f885cdc..f0f07a36c9807 100644
--- a/crates/oxc_linter/src/config/rules.rs
+++ b/crates/oxc_linter/src/config/rules.rs
@@ -59,11 +59,12 @@ impl IntoIterator for OxlintRules {
 }
 
 impl OxlintRules {
-    #[allow(clippy::option_if_let_else)]
+    #[allow(clippy::option_if_let_else, clippy::print_stdout)]
     pub(crate) fn override_rules(&self, rules_for_override: &mut RuleSet, all_rules: &[RuleEnum]) {
         use itertools::Itertools;
         let mut rules_to_replace: Vec<RuleWithSeverity> = vec![];
         let mut rules_to_remove: Vec<RuleWithSeverity> = vec![];
+        let mut rules_not_matched: Vec<&str> = vec![];
 
         // Rules can have the same name but different plugin names
         let lookup = self.iter().into_group_map_by(|r| r.rule_name.as_str());
@@ -87,6 +88,8 @@ impl OxlintRules {
                                 let config = rule_config.config.clone().unwrap_or_default();
                                 let rule = rule.read_json(config);
                                 rules_to_replace.push(RuleWithSeverity::new(rule, severity));
+                            } else {
+                                rules_not_matched.push(rule_name);
                             }
                         }
                         AllowWarnDeny::Allow => {
@@ -96,6 +99,8 @@ impl OxlintRules {
                             {
                                 let rule = rule.clone();
                                 rules_to_remove.push(rule);
+                            } else {
+                                rules_not_matched.push(rule_name);
                             }
                         }
                     }
@@ -127,6 +132,13 @@ impl OxlintRules {
         for rule in rules_to_replace {
             rules_for_override.replace(rule);
         }
+
+        if !rules_not_matched.is_empty() {
+            println!("The following rules do not match the currently supported rules:");
+            for rule in rules_not_matched {
+                println!("{rule}");
+            }
+        }
     }
 }