From 0a0a0eb57472afc479597c8adee4ead399756923 Mon Sep 17 00:00:00 2001
From: Yoshua Wuyts <yoshuawuyts@gmail.com>
Date: Tue, 17 Oct 2017 14:20:25 +0200
Subject: [PATCH] add env option

---
 index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 2597ac9..7f8e462 100644
--- a/index.js
+++ b/index.js
@@ -10,9 +10,11 @@ module.exports = function (b, opts) {
     throw new Error('tinyify: must be used as a plugin, not a transform')
   }
 
+  opts = opts || {}
+
   var env = Object.assign({
     NODE_ENV: 'production'
-  }, process.env)
+  }, process.env, opts.env)
 
   // Remove `assert()` calls.
   b.transform(unassertify, { global: true })