From c4aa22c56dd5fb0ecae71959b291707ba0f52ff5 Mon Sep 17 00:00:00 2001
From: "qingwei.li" <cinwell.li@gmail.com>
Date: Mon, 10 Jul 2017 22:19:55 +0800
Subject: [PATCH] feat: alias option supports regexp, resolve #183

---
 dev.html                        |  4 +---
 src/core/router/history/base.js | 11 +++++++++--
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/dev.html b/dev.html
index 30e88f481..5913d4f5c 100644
--- a/dev.html
+++ b/dev.html
@@ -19,9 +19,7 @@
 <script>
   window.$docsify = {
     alias: {
-      '/de-de/changelog': '/changelog',
-      '/zh-cn/changelog': '/changelog',
-      '/changelog': 'https://raw.githubusercontent.com/QingWei-Li/docsify/master/CHANGELOG'
+      '.*?/changelog': 'https://raw.githubusercontent.com/QingWei-Li/docsify/master/CHANGELOG'
     },
     auto2top: true,
     basePath: '/docs/',
diff --git a/src/core/router/history/base.js b/src/core/router/history/base.js
index 913a194da..81cccf3f4 100644
--- a/src/core/router/history/base.js
+++ b/src/core/router/history/base.js
@@ -1,8 +1,15 @@
 import { getPath, isAbsolutePath } from '../util'
 import { noop } from '../../util/core'
 
-function getAlias (path, alias) {
-  return alias[path] ? getAlias(alias[path], alias) : path
+const cached = {}
+
+function getAlias (path, alias, last) {
+  const match = Object.keys(alias).filter((key) => {
+    const re = cached[key] || (cached[key] = new RegExp(`^${key}$`))
+    return re.test(path) && path !== last
+  })[0]
+
+  return match ? getAlias(path.replace(cached[match], alias[match]), alias, path) : path
 }
 
 function getFileName (path) {