add first working version

src/extension.ts

@@ -0,0 +1,49 @@
+import * as path from 'path';
+import { ExtensionContext } from 'vscode';
+import {
+    LanguageClient,
+    LanguageClientOptions,
+    ServerOptions,
+    TransportKind
+} from 'vscode-languageclient/node';
+
+let client: LanguageClient;
+
+export function activate(context: ExtensionContext) {
+    // The server is implemented in node
+    const serverModule = context.asAbsolutePath(path.join('out', 'server.js'));
+
+    // Server options - run the server in Node
+    const serverOptions: ServerOptions = {
+        run: { module: serverModule, transport: TransportKind.ipc },
+        debug: {
+            module: serverModule,
+            transport: TransportKind.ipc,
+            options: { execArgv: ['--nolazy', '--inspect=6009'] }
+        }
+    };
+
+    // Options to control the language client
+    const clientOptions: LanguageClientOptions = {
+        // Register the server for EFTL documents
+        documentSelector: [{ scheme: 'file', language: 'eftl' }]
+    };
+
+    // Create the language client and start the client
+    client = new LanguageClient(
+        'eftlLanguageServer',
+        'EFTL Language Server',
+        serverOptions,
+        clientOptions
+    );
+
+    // Start the client. This will also launch the server
+    client.start();
+}
+
+export function deactivate(): Thenable<void> | undefined {
+    if (!client) {
+        return undefined;
+    }
+    return client.stop();
+}