Polygerrit: Wipe out license headers in minified gr-app.js

By default terser keeps all licensing comments as many licenses require
you to keep a copy of the license in redistributed source: [1]

--comments [filter] Preserve copyright comments in the output. By
                    default this works like Google Closure, keeping
                    JSDoc-style comments that contain "@license" or
                    "@preserve". You can optionally pass one of the
                    following arguments to this flag:
                    - "all" to keep all comments
                    - `false` to omit comments in the output
                    - a valid JS RegExp like `/foo/` or `/^!/` to
                    keep only matching comments.
                    Note that currently not *all* comments can be
                    kept when compression is on, because of dead
                    code removal or cascading statements into
                    sequences.

In minified gr-app.js version we don't need to preserve license
information and can remove it. This saves ca. 300KB in gr-app.js size.

[1] https://github.com/terser/terser

Bug: Issue 13870
Change-Id: I2736879d252994200ad2f52e414e224ebe56b65d

1 files changed, 7 insertions, 1 deletions

diff --git a/polygerrit-ui/app/rollup.config.js b/polygerrit-ui/app/rollup.config.js
index d83f24fb25..cfc8c015fd 100644
--- a/polygerrit-ui/app/rollup.config.js
+++ b/polygerrit-ui/app/rollup.config.js
@@ -75,7 +75,13 @@ export default {
   output: {
     format: 'iife',
     compact: true,
-    plugins: [terser()]
+    plugins: [
+      terser({
+        output: {
+          comments: false
+        }
+      })
+    ]
   },
   //Context must be set to window to correctly processing global variables
   context: 'window',