feat(ls): validate the rule name validation regex and show an error message if incorrect.

Author: plusvic

Cargo.lock

@@ -37,6 +37,7 @@ default = ["full-compiler"]
 bitflags = { workspace = true }
 dashmap = { version = "6.1.0" }
 futures = "0.3.31"
+regex = { workspace = true }
 tracing = { version = "0.1.44", optional = true }
 tracing-subscriber = { version = "0.3.22", optional = true }
 itertools = { workspace = true}

ls/Cargo.toml

@@ -103,7 +103,7 @@
         "YARA.ruleNameValidation": {
           "type": "string",
           "default": "",
-          "description": "A regular expression that all rule names must match."
+          "description": "A regular expression that all rule names must match (example: APT_.*)."
         }
       }
     },

ls/editors/code/package.json

@@ -24,12 +24,12 @@ use async_lsp::lsp_types::{
     DocumentSymbolResponse, FullDocumentDiagnosticReport,
     GotoDefinitionParams, GotoDefinitionResponse, Hover, HoverParams,
     HoverProviderCapability, InitializeParams, InitializeResult, Location,
-    OneOf, PublishDiagnosticsParams, ReferenceParams,
+    MessageType, OneOf, PublishDiagnosticsParams, ReferenceParams,
     RelatedFullDocumentDiagnosticReport, RenameParams, SaveOptions,
     SelectionRange, SelectionRangeParams, SelectionRangeProviderCapability,
     SemanticTokensFullOptions, SemanticTokensLegend, SemanticTokensOptions,
     SemanticTokensRangeResult, SemanticTokensResult,
-    SemanticTokensServerCapabilities, ServerCapabilities,
+    SemanticTokensServerCapabilities, ServerCapabilities, ShowMessageParams,
     TextDocumentSyncCapability, TextDocumentSyncKind, TextDocumentSyncOptions,
     TextDocumentSyncSaveOptions, TextEdit, Url, WorkspaceEdit,
 };
@@ -553,7 +553,7 @@ impl YARALanguageServer {
         mut client: ClientSocket,
         scope_uri: Url,
     ) -> Settings {
-        client
+        let settings = client
             .configuration(ConfigurationParams {
                 items: vec![
                     ConfigurationItem {
@@ -583,7 +583,20 @@ impl YARALanguageServer {
 
                 Settings { metadata_validation, rule_name_validation }
             })
-            .unwrap_or_default()
+            .unwrap_or_default();
+
+        if let Some(re) = &settings.rule_name_validation {
+            if regex::Regex::new(re).is_err() {
+                let _ = client.show_message(ShowMessageParams {
+                    typ: MessageType::ERROR,
+                    message: format!(
+                        "YARA: wrong rule name validation regex: {re}"
+                    ),
+                });
+            }
+        }
+
+        settings
     }
 
     /// Sends diagnostics for specific document if publish model is used.