From cf4133d453bae88b77491a15acba4edecd8dc4a5 Mon Sep 17 00:00:00 2001
From: archmoj <mojtaba@plot.ly>
Date: Fri, 22 Jan 2021 16:22:32 -0500
Subject: [PATCH] avoid redundant plotly.js Copyright comments in bundles

---
 package.json              |  1 +
 tasks/compress_headers.js | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 tasks/compress_headers.js

diff --git a/package.json b/package.json
index 63bbe4b860d..dce2c60936d 100644
--- a/package.json
+++ b/package.json
@@ -54,6 +54,7 @@
   "browserify": {
     "transform": [
       "glslify",
+      "./tasks/compress_headers.js",
       "./tasks/compress_attributes.js"
     ]
   },
diff --git a/tasks/compress_headers.js b/tasks/compress_headers.js
new file mode 100644
index 00000000000..9f06366c202
--- /dev/null
+++ b/tasks/compress_headers.js
@@ -0,0 +1,27 @@
+var through = require('through2');
+
+var licenseSrc = require('./util/constants').licenseSrc
+    .replace(/\//g, '\\/')
+    .replace(/\*/g, '\\*')
+    .replace(/\n/g, '[^]');
+
+/**
+ * Browserify transform that strips redundant plotly.js Copyright comments out
+ * of the plotly.js bundles
+ */
+
+var WHITESPACE_BEFORE = '\\s*';
+
+module.exports = function() {
+    var allChunks = [];
+    return through(function(chunk, enc, next) {
+        allChunks.push(chunk);
+        next();
+    }, function(done) {
+        var str = Buffer.concat(allChunks).toString('utf-8');
+        this.push(
+            str.replace(new RegExp(WHITESPACE_BEFORE + licenseSrc, 'g'), '')
+        );
+        done();
+    });
+};