From 1732007ce850f36a12ead70822ac21ab3a7da337 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Wed, 6 Jun 2018 14:13:05 -0400
Subject: [PATCH] feat: bail when user directly mutate output.publicPath

---
 packages/@vue/cli-service/lib/Service.js          | 15 +++++++++++++++
 .../@vue/cli-service/lib/commands/build/index.js  |  1 +
 2 files changed, 16 insertions(+)

diff --git a/packages/@vue/cli-service/lib/Service.js b/packages/@vue/cli-service/lib/Service.js
index 06ce89a46..236815dbe 100644
--- a/packages/@vue/cli-service/lib/Service.js
+++ b/packages/@vue/cli-service/lib/Service.js
@@ -191,6 +191,21 @@ module.exports = class Service {
         config = merge(config, fn)
       }
     })
+
+    // check if the user has manually mutated output.publicPath
+    const target = process.env.VUE_CLI_BUILD_TARGET
+    const exceptionTargets = ['lib', 'wc', 'wc-async']
+    if (
+      !exceptionTargets.includes(target) &&
+      config.output.publicPath !== this.projectOptions.baseUrl
+    ) {
+      error(
+        `Do not modify webpack output.publicPath directly. ` +
+        `Use the "baseUrl" option in vue.config.js instead.`
+      )
+      process.exit(1)
+    }
+
     return config
   }
 
diff --git a/packages/@vue/cli-service/lib/commands/build/index.js b/packages/@vue/cli-service/lib/commands/build/index.js
index 701ef6ff7..31d8e02b6 100644
--- a/packages/@vue/cli-service/lib/commands/build/index.js
+++ b/packages/@vue/cli-service/lib/commands/build/index.js
@@ -71,6 +71,7 @@ module.exports = (api, options) => {
     }
 
     // resolve raw webpack config
+    process.env.VUE_CLI_BUILD_TARGET = args.target
     let webpackConfig
     if (args.target === 'lib') {
       webpackConfig = require('./resolveLibConfig')(api, args, options)