From b456eed0b789e4a1a7e3367430ed54f9dccaff83 Mon Sep 17 00:00:00 2001
From: Paul Gschwendtner <paulgschwendtner@gmail.com>
Date: Mon, 19 Jun 2017 18:30:37 +0200
Subject: [PATCH] build: keep license comment in minified umd (#5196)

* The `preserveComments` option from the old uglify gulp plugin is not valid for the programmatic API. Setting the `comments` option `some` means that license commens will be preserved.
---
 tools/package-tools/minify-sources.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/package-tools/minify-sources.ts b/tools/package-tools/minify-sources.ts
index 382a955aa9c..2b85f16c4f1 100644
--- a/tools/package-tools/minify-sources.ts
+++ b/tools/package-tools/minify-sources.ts
@@ -7,8 +7,10 @@ const uglify = require('uglify-js');
 export function uglifyJsFile(inputPath: string, outputPath: string) {
   const sourcemapOut = `${outputPath}.map`;
   const result = uglify.minify(inputPath, {
-    preserveComments: 'license',
-    outSourceMap: sourcemapOut
+    outSourceMap: sourcemapOut,
+    output: {
+      comments: 'some'
+    }
   });
 
   writeFileSync(outputPath, result.code);