fix htmlMinifier error if user sets NODE_ENV after requiring vueify

Author: yyx990803

lib/compiler.js

@@ -13,19 +13,14 @@ var assign = require('object-assign')
 var deindent = require('de-indent')
 var Emitter = require('events').EventEmitter
 
-// production minifiers
-if (process.env.NODE_ENV === 'production') {
-  var htmlMinifier = require('html-minifier')
-  // required for Vue 1.0 shorthand syntax
-  var htmlMinifyOptions = {
-    collapseWhitespace: true,
-    removeComments: true,
-    collapseBooleanAttributes: true,
-    removeAttributeQuotes: true,
-    useShortDoctype: true,
-    removeEmptyAttributes: true,
-    removeOptionalTags: true
-  }
+var htmlMinifyOptions = {
+  collapseWhitespace: true,
+  removeComments: true,
+  collapseBooleanAttributes: true,
+  removeAttributeQuotes: true,
+  useShortDoctype: true,
+  removeEmptyAttributes: true,
+  removeOptionalTags: true
 }
 
 // expose compiler
@@ -233,7 +228,7 @@ function processTemplate (node, filePath, id, hasScopedStyle, fullSource) {
     })
     .then(function (res) {
       if (process.env.NODE_ENV === 'production') {
-        res.source = htmlMinifier.minify(res.source, htmlMinifyOptions)
+        res.source = require('html-minifier').minify(res.source, htmlMinifyOptions)
       }
       return res
     })