From a36b9124b559d65a724da74f2611a15d3122626f Mon Sep 17 00:00:00 2001
From: Peach <scdzwyxst@gmail.com>
Date: Tue, 1 May 2018 23:10:45 +0800
Subject: [PATCH] Fix reference pass error in package config (#1149)

---
 src/assets/LESSAsset.js    | 8 ++++----
 src/assets/SASSAsset.js    | 8 ++++----
 src/transforms/postcss.js  | 2 +-
 src/transforms/posthtml.js | 2 +-
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/src/assets/LESSAsset.js b/src/assets/LESSAsset.js
index 0857e3e55fa..7fc0a2a0a6c 100644
--- a/src/assets/LESSAsset.js
+++ b/src/assets/LESSAsset.js
@@ -13,10 +13,10 @@ class LESSAsset extends Asset {
     let less = await localRequire('less', this.name);
     let render = promisify(less.render.bind(less));
 
-    let opts =
-      this.package.less ||
-      (await this.getConfig(['.lessrc', '.lessrc.js'])) ||
-      {};
+    let opts = Object.assign(
+      {},
+      this.package.less || (await this.getConfig(['.lessrc', '.lessrc.js']))
+    );
     opts.filename = this.name;
     opts.plugins = (opts.plugins || []).concat(urlPlugin(this));
 
diff --git a/src/assets/SASSAsset.js b/src/assets/SASSAsset.js
index 3bc2d0bf1d7..afaee8a5627 100644
--- a/src/assets/SASSAsset.js
+++ b/src/assets/SASSAsset.js
@@ -21,10 +21,10 @@ class SASSAsset extends Asset {
       rootDir: this.options.rootDir
     });
 
-    let opts =
-      this.package.sass ||
-      (await this.getConfig(['.sassrc', '.sassrc.js'])) ||
-      {};
+    let opts = Object.assign(
+      {},
+      this.package.sass || (await this.getConfig(['.sassrc', '.sassrc.js']))
+    );
     opts.includePaths = (opts.includePaths || []).concat(
       path.dirname(this.name)
     );
diff --git a/src/transforms/postcss.js b/src/transforms/postcss.js
index 6e861503b29..03cbb37d34b 100644
--- a/src/transforms/postcss.js
+++ b/src/transforms/postcss.js
@@ -31,7 +31,7 @@ async function getConfig(asset) {
     return;
   }
 
-  config = config || {};
+  config = Object.assign({}, config);
 
   let postcssModulesConfig = {
     getJSON: (filename, json) => (asset.cssModules = json)
diff --git a/src/transforms/posthtml.js b/src/transforms/posthtml.js
index 5dca2d57f15..f1d2ef97ed8 100644
--- a/src/transforms/posthtml.js
+++ b/src/transforms/posthtml.js
@@ -26,7 +26,7 @@ async function getConfig(asset) {
     return;
   }
 
-  config = config || {};
+  config = Object.assign({}, config);
   config.plugins = await loadPlugins(config.plugins, asset.name);
   config.skipParse = true;
   return config;