From e6acdbc9bfdf1d6ae39adcccc202596afa015bd2 Mon Sep 17 00:00:00 2001
From: "Xin Du (Clark)" <clark.duxin@gmail.com>
Date: Thu, 4 Jul 2019 13:58:07 +0100
Subject: [PATCH] fix(cli): prevent both `nuxt` & `nuxt-edge` being installed
 (#6020)

---
 packages/cli/src/run.js                 | 11 +++++++++++
 packages/cli/test/unit/run-edge.test.js | 12 ++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 packages/cli/test/unit/run-edge.test.js

diff --git a/packages/cli/src/run.js b/packages/cli/src/run.js
index 0f03c02356..d7c8be4929 100644
--- a/packages/cli/src/run.js
+++ b/packages/cli/src/run.js
@@ -1,10 +1,21 @@
 import fs from 'fs'
+import path from 'path'
 import execa from 'execa'
+import { name as pkgName } from '../package.json'
 import NuxtCommand from './command'
 import setup from './setup'
 import getCommand from './commands'
 
+function checkDuplicateNuxt() {
+  const dupPkg = pkgName === '@nuxt/cli' ? 'cli-edge' : 'cli'
+  if (fs.existsSync(path.resolve(__dirname, '..', '..', dupPkg))) {
+    throw new Error('Both `nuxt` and `nuxt-edge` are installed! This is unsupported, please choose one and remove the other one from dependencies.')
+  }
+}
+
 export default async function run(_argv) {
+  checkDuplicateNuxt()
+
   // Read from process.argv
   const argv = _argv ? Array.from(_argv) : process.argv.slice(2)
 
diff --git a/packages/cli/test/unit/run-edge.test.js b/packages/cli/test/unit/run-edge.test.js
new file mode 100644
index 0000000000..1f0ca758a4
--- /dev/null
+++ b/packages/cli/test/unit/run-edge.test.js
@@ -0,0 +1,12 @@
+import run from '../../src/run'
+
+jest.mock('../../package.json', () => ({
+  name: 'cli-edge'
+}))
+
+describe('run in edge', () => {
+  test('throws error if nuxt and nuxt-edge are installed', async () => {
+    await expect(run())
+      .rejects.toThrow('Both `nuxt` and `nuxt-edge` are installed! This is unsupported, please choose one and remove the other one from dependencies.')
+  })
+})