Merge branch 'master' of https://github.com/weexteam/weex-vue-loader into feature-loader

Author: erha19

lib/style-loader.js

@@ -2,7 +2,7 @@ var styler = require('weex-styler')
 
 module.exports = function (content) {
   this.cacheable && this.cacheable()
-  return 'module.exports = ' + genStyleString(content)
+  return 'module.exports = ' + genStyleString(content, this)
 }
 
 // @todo:
@@ -25,13 +25,22 @@ function convertLength (k, v) {
   return v
 }
 
-function genStyleString (input) {
+function genStyleString (input, loader) {
   var output = '{}'
   styler.parse(input, function (err, obj) {
     if (err) {
       return
     }
     if (obj && obj.jsonStyle) {
+      if (obj.log) {
+        obj.log.map((log) => {
+          if (log.selectors) {
+            loader.emitWarning(`${log.selectors}: ${log.reason}`)
+          } else {
+            loader.emitWarning(`${log.reason}`)
+          }
+        })
+      }
       try {
         output = JSON.stringify(obj.jsonStyle, convertLength, 2)
           .replace(/"([-+]?[0-9]*\.?[0-9]+)CSS_UNIT_([A-Z]+)"/g, '$1 * CSS_UNIT.$2')