From 45c4a501db5397ad431325a86f133bb788f91f90 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 10 Mar 2016 12:52:58 -0500
Subject: [PATCH] cssnano: safe by default, allow config in vue.config.js

---
 lib/style-rewriter.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/style-rewriter.js b/lib/style-rewriter.js
index e969c87..a212d0a 100644
--- a/lib/style-rewriter.js
+++ b/lib/style-rewriter.js
@@ -1,6 +1,7 @@
 var postcss = require('postcss')
 var selectorParser = require('postcss-selector-parser')
 var cache = require('lru-cache')(100)
+var assign = require('object-assign')
 var options = require('./compilers/options')
 
 var currentId
@@ -58,9 +59,10 @@ module.exports = function (id, css, scoped) {
     }
     // minification
     if (process.env.NODE_ENV === 'production') {
-      plugins.push(require('cssnano')({
-        autoprefixer: false
-      }))
+      plugins.push(require('cssnano')(assign({
+        autoprefixer: false,
+        safe: true
+      }, options.cssnano)))
     }
     currentId = id
     return postcss(plugins)