fix: make sure cloned rules reuse the exact same ident in options

close #1199

Author: yyx990803

Diff for: lib/plugin.js

@@ -35,7 +35,7 @@ module.exports = class VueLoaderPlugin {
     // find the normalized version of the vue rule
     const normalizedVueRule = rawNormalizedRules[vueRuleIndex]
     // get the normlized "use" for vue files
-    const normalizedVueUse = normalizedVueRule.use.map(cleanUse)
+    const normalizedVueUse = normalizedVueRule.use
     // get vue-loader options
     const vueLoaderUseIndex = normalizedVueUse.findIndex(u => {
       return /^vue-loader|(\/|\\)vue-loader/.test(u.loader)
@@ -83,20 +83,18 @@ module.exports = class VueLoaderPlugin {
     // for each user rule, inject a cloned rule by checking if the rule
     // matches the lang specified in the resourceQuery.
     rawRules.unshift.apply(rawRules, baseRules.map((rule, i) => {
-      return cloneRule(rule, normalizedRules[i], normalizedVueUse)
+      return cloneRule(rule, normalizedRules[i])
     }))
 
     // inject global pitcher (responsible for injecting template compiler
     // loader & CSS post loader)
     rawRules.unshift({
       loader: require.resolve('./loaders/pitch')
     })
-
-    // console.log(rawRules)
   }
 }
 
-function cloneRule (rule, normalizedRule, vueUse) {
+function cloneRule (rule, normalizedRule) {
   // Assuming `test` and `resourceQuery` tests are executed in series and
   // synchronously (which is true based on RuleSet's implementation), we can
   // save the current resource being matched from `test` so that we can access
@@ -123,31 +121,27 @@ function cloneRule (rule, normalizedRule, vueUse) {
       }
       return true
     },
-    use: (normalizedRule.use || []).map(cleanUse)
+    use: normalizedRule.use ? normalizedRule.use.map(reuseIdent) : undefined
   })
 
-  if (!res.use.length) {
-    delete res.use
-  }
-
   // delete shorthand since we have normalized use
   delete res.loader
   delete res.loaders
   delete res.options
 
   if (rule.oneOf) {
     res.oneOf = rule.oneOf.map((r, i) => {
-      return cloneRule(r, normalizedRule.oneOf[i], vueUse)
+      return cloneRule(r, normalizedRule.oneOf[i])
     })
   }
 
   return res
 }
 
-// "ident" is exposed on normalized uses, delete in case it
-// interferes with another normalization
-function cleanUse (use) {
-  const res = Object.assign({}, use)
-  delete res.ident
-  return res
+function reuseIdent (use) {
+  if (use.ident) {
+    use.options.ident = use.ident
+    delete use.ident
+  }
+  return use
 }