Optimized production build of server, reducing the startup time and overall size of the VS Code extension significantly.

.vscode/launch.json

@@ -8,7 +8,7 @@
       "program": "${workspaceRoot}/index.debug.js",
       "protocol": "inspector",
       "cwd": "${workspaceRoot}",
-      "preLaunchTask": "npm: build:analyzer",
+      "preLaunchTask": "npm: build:serverDebug",
       "args": [
         "-p",
         "${workspaceRoot}/../brain",
@@ -38,7 +38,7 @@
       "type": "extensionHost",
       "request": "launch",
       "runtimeExecutable": "${workspaceRoot}/client/out/src/extension.js",
-      "preLaunchTask": "npm: build:clientServer",
+      "preLaunchTask": "npm: build:clientServerDebug",
       "args": [
         "--extensionDevelopmentPath=${workspaceFolder}/client"
       ],

client/.vscodeignore

@@ -0,0 +1,12 @@
+# Don't include the large "lsif" files that are included
+# in some node_modules.
+**/*.lsif
+
+# No need to include source maps, original copy of the src or tests.
+**/*.map
+
+tsconfig.json
+
+# Omit all of the server directory except for the main bundle.
+server
+!server/server.bundle.js

client/src/extension.ts

@@ -16,14 +16,15 @@ import { LanguageClient, LanguageClientOptions, ServerOptions, TransportKind,
 import { ProgressReporting } from './progress';
 
 export function activate(context: ExtensionContext) {
-	let serverModule = context.asAbsolutePath(path.join('server', 'server.js'));
+	let serverModule = context.asAbsolutePath(path.join('server', 'server.bundle.js'));
+	let serverModuleDebug = context.asAbsolutePath(path.join('server', 'server.js'));
 	let debugOptions = { execArgv: ["--nolazy", "--inspect=6600"] };
 	
 	// If the extension is launched in debug mode, then the debug server options are used.
 	// Otherwise the run options are used.
 	let serverOptions: ServerOptions = {
 		run : { module: serverModule, transport: TransportKind.ipc },
-		debug: { module: serverModule, transport: TransportKind.ipc, options: debugOptions }
+		debug: { module: serverModuleDebug, transport: TransportKind.ipc, options: debugOptions }
 	}
 	
 	// Options to control the language client

package.json

@@ -14,11 +14,11 @@
     },
     "scripts": {
         "install:all": "npm install && cd server && npm install && cd ../client && npm install && cd ..",
-        "build": "npm run build:clientServer && npm run build:cli",
+        "build": "npm run build:clientServerDebug && npm run build:cli",
         "build:client": "cd client && npm run build && cd ..",
-        "build:server": "cd server && npm run build && cd ..",
-        "build:clientServer": "npm run build:client && npm run build:server",
-        "build:analyzer": "cd server && npm run build:analyzer && cd ..",
+        "build:clientServerDebug": "npm run build:client && npm run build:serverDebug",
+        "build:serverProd": "cd server && npm run build:serverProd && cd ..",
+        "build:serverDebug": "cd server && npm run build:serverDebug && cd ..",
         "build:cli": "cd server && npm run build:cli && cd ..",
         "package": "npm run install:all && npm run build && cd client && npx vsce package && cd .."
     },

server/package.json

@@ -5,14 +5,13 @@
     "version": "1.0.70",
     "license": "MIT",
     "scripts": {
-        "start": "npm run start:analyzer && npm run start:server",
-        "start:analyzer": "npm i && npm run build:analyzer",
-        "start:server": "npm i && npm run build:server",
-        "build": "npm run build:server && npm run build:analyzer && npm run build:cli",
-        "build:analyzer": "tsc",
-        "build:server": "npm run installServer && npm run removeLsifFiles && webpack --config webpack.config-server.js",
+        "start": "npm run start:serverDebug && npm run start:server",
+        "start:serverDebug": "npm i && npm run build:serverDebug",
+        "start:serverProd": "npm i && npm run build:serverProd",
+        "build": "npm run build:serverProd && npm run build:serverDebug && npm run build:cli",
+        "build:serverDebug": "tsc",
+        "build:serverProd": "npm run installServer && webpack --config webpack.config-server.js",
         "installServer": "node ./customInstallServerIntoExtension.js ../client ./package.json ./tsconfig.json ./package-lock.json",
-        "removeLsifFiles": "find . -name '*.lsif' -type f -delete",
         "build:cli": "node ./copyTypeshedFallback.js && npm run tslint && webpack --config webpack.config-cli.js",
         "watch": "tsc --watch",
         "tslint": "tslint --project tsconfig.json --fix",

server/src/server.ts

@@ -9,8 +9,7 @@ import {
     DiagnosticSeverity, DiagnosticTag, ExecuteCommandParams, IConnection,
     InitializeResult, IPCMessageReader, IPCMessageWriter, Location, ParameterInformation,
     Position, Range, ResponseError, SignatureInformation, SymbolInformation, TextDocuments,
-    TextEdit,
-    WorkspaceEdit
+    TextEdit, WorkspaceEdit
 } from 'vscode-languageserver';
 import VSCodeUri from 'vscode-uri';
 

server/webpack.config-server.js

@@ -9,13 +9,18 @@
 const path = require('path');
 
 module.exports = {
+    context: path.resolve(__dirname),
     entry: './src/server.ts',
-    mode: 'development',
+    mode: 'production',
     target: 'node',
+    devtool: 'source-map',
     output: {
-        filename: 'server.js',
+        filename: 'server.bundle.js',
         path: path.resolve(__dirname, '../client/server')
     },
+    optimization: {
+        usedExports: true,
+    },
     resolve: {
         modules: [
             path.resolve(__dirname, '.'),
@@ -35,6 +40,8 @@ module.exports = {
         ]
     },
     node: {
-        fs: 'empty'
+        fs: 'empty',
+        __dirname: false,
+        __filename: false
     }
 };