LSP: Allow for an LSP extension match on any suffix, not just filename and ext

crates/extension/src/extension_store_test.rs

@@ -198,6 +198,7 @@ async fn test_extension_store(cx: &mut TestAppContext) {
                     matcher: LanguageMatcher {
                         path_suffixes: vec!["erb".into()],
                         first_line_pattern: None,
+                        path_regex: None,
                     },
                 },
             ),
@@ -210,6 +211,7 @@ async fn test_extension_store(cx: &mut TestAppContext) {
                     matcher: LanguageMatcher {
                         path_suffixes: vec!["rb".into()],
                         first_line_pattern: None,
+                        path_regex: None,
                     },
                 },
             ),

crates/language/src/language.rs

@@ -608,6 +608,14 @@ pub struct LanguageMatcher {
     /// Given a list of `LanguageConfig`'s, the language of a file can be determined based on the path extension matching any of the `path_suffixes`.
     #[serde(default)]
     pub path_suffixes: Vec<String>,
+    /// A Regex pattern that determines whether the language should be assigned to a file based on the name of the file.
+    #[serde(
+        default,
+        serialize_with = "serialize_regex",
+        deserialize_with = "deserialize_regex"
+    )]
+    #[schemars(schema_with = "regex_json_schema")]
+    pub path_regex: Option<Regex>,
     /// A regex pattern that determines whether the language should be assigned to a file or not.
     #[serde(
         default,

crates/language/src/language_registry.rs

@@ -516,6 +516,10 @@ impl LanguageRegistry {
                 .path_suffixes
                 .iter()
                 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())));
+            let path_matches_regex = config
+                .path_regex
+                .as_ref()
+                .map_or(false, |regex| filename.map_or(false, |p| regex.is_match(p)));
             let path_matches_custom_suffix = user_file_types
                 .and_then(|types| types.get(language_name))
                 .unwrap_or(&empty)
@@ -532,7 +536,7 @@ impl LanguageRegistry {
             );
             if path_matches_custom_suffix {
                 2
-            } else if path_matches_default_suffix || content_matches {
+            } else if path_matches_default_suffix || content_matches || path_matches_regex {
                 1
             } else {
                 0