From 05f9f3adbcdc1bb1db4464bae3253717748e0326 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 3 May 2018 16:09:42 -0400
Subject: [PATCH] feat(serve): support entry in `vue-cli-service serve` close
 #974

---
 packages/@vue/cli-service/lib/commands/serve.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/@vue/cli-service/lib/commands/serve.js b/packages/@vue/cli-service/lib/commands/serve.js
index c8d3a9fad2..3eed23c4ef 100644
--- a/packages/@vue/cli-service/lib/commands/serve.js
+++ b/packages/@vue/cli-service/lib/commands/serve.js
@@ -13,7 +13,7 @@ const defaults = {
 module.exports = (api, options) => {
   api.registerCommand('serve', {
     description: 'start development server',
-    usage: 'vue-cli-service serve [options]',
+    usage: 'vue-cli-service serve [options] [entry]',
     options: {
       '--open': `open browser on server start`,
       '--mode': `specify env mode (default: development)`,
@@ -42,6 +42,13 @@ module.exports = (api, options) => {
     // resolve webpack config
     const webpackConfig = api.resolveWebpackConfig()
 
+    const entry = args._[0]
+    if (entry) {
+      webpackConfig.entry = {
+        app: api.resolve(entry)
+      }
+    }
+
     // inject dev & hot-reload middleware entries
     if (!isProduction) {
       const devClients = [