From e1cc1dcb4b9066505385300900ab9c3651a95ef4 Mon Sep 17 00:00:00 2001
From: Lars Kappert <lars@webpro.nl>
Date: Sun, 16 Nov 2014 20:28:39 +0100
Subject: [PATCH] Introduce --remove-comments (-c) option

---
 bin/6to5/index.js                | 4 +++-
 lib/6to5/file.js                 | 3 ++-
 lib/6to5/generation/generator.js | 2 +-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/bin/6to5/index.js b/bin/6to5/index.js
index b492dbb1b7..16966f58d0 100755
--- a/bin/6to5/index.js
+++ b/bin/6to5/index.js
@@ -17,6 +17,7 @@ commander.option("-w, --whitelist [whitelist]", "Whitelist of transformers to ON
 commander.option("-b, --blacklist [blacklist]", "Blacklist of transformers to NOT use", util.list);
 commander.option("-o, --out-file [out]", "Compile all input files into a single file");
 commander.option("-d, --out-dir [out]", "Compile an input directory of modules into an output directory");
+commander.option("-c, --remove-comments", "Remove comments from the compiled code", false);
 
 commander.on("--help", function(){
   var outKeys = function (title, obj) {
@@ -89,7 +90,8 @@ exports.opts = {
   whitelist:     commander.whitelist,
   sourceMap:     commander.sourceMaps || commander.sourceMapsInline,
   runtime:       commander.runtime,
-  modules:       commander.modules
+  modules:       commander.modules,
+  comments:      !commander.removeComments
 };
 
 var fn;
diff --git a/lib/6to5/file.js b/lib/6to5/file.js
index 35d9fb22ba..c30ea79d41 100644
--- a/lib/6to5/file.js
+++ b/lib/6to5/file.js
@@ -32,7 +32,8 @@ File.normaliseOptions = function (opts) {
     filename:   "unknown",
     modules:    "common",
     runtime:    false,
-    code:       true
+    code:       true,
+    comments:   true
   });
 
   // normalise windows path separators to unix
diff --git a/lib/6to5/generation/generator.js b/lib/6to5/generation/generator.js
index 4a75e27b77..fa1f38cfbe 100644
--- a/lib/6to5/generation/generator.js
+++ b/lib/6to5/generation/generator.js
@@ -17,7 +17,7 @@ var _          = require("lodash");
 function CodeGenerator(ast, opts, code) {
   opts = opts || {};
 
-  this.comments = ast.comments || [];
+  this.comments = opts.comments ? (ast.comments || []) : [];
   this.tokens   = ast.tokens || [];
   this.format   = CodeGenerator.normaliseOptions(opts);
   this.ast      = ast;