support connecting by socket with --socket=PORT

Author: sumneko

client/src/languageserver.ts

@@ -18,6 +18,7 @@ import {
     DocumentSelector,
     LSPAny,
     ExecuteCommandRequest,
+    TransportKind,
 } from 'vscode-languageclient/node';
 
 export let defaultClient: LuaClient | null;
@@ -106,8 +107,14 @@ class LuaClient {
 
         if (!Array.isArray(commandParam)) throw new Error("Lua.misc.parameters must be an Array!");
 
+        const port = this.getPort(commandParam);
+
         const serverOptions: ServerOptions = {
             command: command,
+            transport: port ? {
+                kind: TransportKind.socket,
+                port: port,
+            } : undefined,
             args:    commandParam,
         };
 
@@ -177,6 +184,23 @@ class LuaClient {
         return command;
     }
 
+    // Generated by Copilot
+    private getPort(commandParam: string[]): number | undefined {
+        // "--socket=xxxx" or "--socket xxxx"
+        const portIndex = commandParam.findIndex((value) => {
+            return value.startsWith("--socket");
+        });
+        if (portIndex === -1) {
+            return undefined;
+        };
+        const port = commandParam[portIndex].split("=")[1]
+                  || commandParam[portIndex + 1];
+        if (!port) {
+            return undefined;
+        };
+        return Number(port);
+    }
+
     async stop() {
         this.client.stop();
         for (const disposable of this.disposables) {