From 5b9fd525fa1210f8a2fe72650e235f4cccb985f6 Mon Sep 17 00:00:00 2001
From: Matt Bierner <matb@microsoft.com>
Date: Wed, 22 Jul 2020 14:44:13 -0700
Subject: [PATCH] Minimize shipped tsserver

This takes the shipped size from 9Mb to 2.9mb
---
 .../extension-browser.webpack.config.js       | 19 +++++++++++++++-
 .../typescript-language-features/package.json |  1 +
 .../src/extension.browser.ts                  |  2 +-
 .../typescript-language-features/yarn.lock    | 22 +++++++++++++++++++
 4 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/extensions/typescript-language-features/extension-browser.webpack.config.js b/extensions/typescript-language-features/extension-browser.webpack.config.js
index 0662fd46d5e..560a4bb021e 100644
--- a/extensions/typescript-language-features/extension-browser.webpack.config.js
+++ b/extensions/typescript-language-features/extension-browser.webpack.config.js
@@ -7,6 +7,8 @@
 
 'use strict';
 const CopyPlugin = require('copy-webpack-plugin');
+const { lchmod } = require('graceful-fs');
+const Terser = require('terser');
 
 const withBrowserDefaults = require('../shared.webpack.config').browser;
 
@@ -19,7 +21,22 @@ module.exports = withBrowserDefaults({
 		// @ts-ignore
 		new CopyPlugin({
 			patterns: [
-				{ from: 'node_modules/typescript-web-server', to: 'typescript-web' }
+				{
+					from: 'node_modules/typescript-web-server',
+					to: 'typescript-web',
+					transform: (content, absoluteFrom) => {
+						if (absoluteFrom.endsWith('tsserver.js')) {
+							return Terser.minify(content.toString()).code;
+						}
+						return content;
+					},
+					transformPath: (targetPath) => {
+						if (targetPath.endsWith('tsserver.js')) {
+							return targetPath.replace('tsserver.js', 'tsserver.web.js');
+						}
+						return targetPath;
+					}
+				}
 			],
 		}),
 	],
diff --git a/extensions/typescript-language-features/package.json b/extensions/typescript-language-features/package.json
index f7266e34480..595dbaea0c0 100644
--- a/extensions/typescript-language-features/package.json
+++ b/extensions/typescript-language-features/package.json
@@ -28,6 +28,7 @@
     "@types/rimraf": "2.0.2",
     "@types/semver": "^5.5.0",
     "copy-webpack-plugin": "^6.0.3",
+    "terser": "^4.8.0",
     "typescript-web-server": "git://github.com/mjbvz/ts-server-web-build",
     "vscode": "^1.1.36"
   },
diff --git a/extensions/typescript-language-features/src/extension.browser.ts b/extensions/typescript-language-features/src/extension.browser.ts
index 8ad9afe9346..f48f2b5071d 100644
--- a/extensions/typescript-language-features/src/extension.browser.ts
+++ b/extensions/typescript-language-features/src/extension.browser.ts
@@ -52,7 +52,7 @@ export function activate(
 	const versionProvider = new StaticVersionProvider(
 		new TypeScriptVersion(
 			TypeScriptVersionSource.Bundled,
-			'/builtin-extension/typescript-language-features/dist/browser/typescript-web/tsserver.js',
+			'/builtin-extension/typescript-language-features/dist/browser/typescript-web/tsserver.web.js',
 			API.v400));
 
 	const lazyClientHost = createLazyClientHost(context, false, {
diff --git a/extensions/typescript-language-features/yarn.lock b/extensions/typescript-language-features/yarn.lock
index ba0a9a2b12b..29b49a2e2e8 100644
--- a/extensions/typescript-language-features/yarn.lock
+++ b/extensions/typescript-language-features/yarn.lock
@@ -250,6 +250,11 @@ commander@2.15.1:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
   integrity sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==
 
+commander@^2.20.0:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -1051,6 +1056,14 @@ source-map-support@^0.5.0:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
 
+source-map-support@~0.5.12:
+  version "0.5.19"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
+  integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
 source-map@^0.6.0, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
@@ -1097,6 +1110,15 @@ tar@^6.0.2:
     mkdirp "^1.0.3"
     yallist "^4.0.0"
 
+terser@^4.8.0:
+  version "4.8.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.0.tgz#63056343d7c70bb29f3af665865a46fe03a0df17"
+  integrity sha512-EAPipTNeWsb/3wLPeup1tVPaXfIaU68xMnVdPafIL1TV05OhASArYyIfFvnvJCNrR2NIOvDVNNTFRa+Re2MWyw==
+  dependencies:
+    commander "^2.20.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.12"
+
 to-regex-range@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/to-regex-range/-/to-regex-range-5.0.1.tgz#1648c44aae7c8d988a326018ed72f5b4dd0392e4"