Make sure not to require react before NODE_ENV has been set (#7200)

* Make sure not to require react before
NODE_ENV has been set

* Update to use force kill to make windows happy

packages/next/bin/next.ts

@@ -11,12 +11,6 @@ import arg from 'next/dist/compiled/arg/index.js'
   }
 })
 
-const React = require('react')
-
-if (typeof React.Suspense === 'undefined') {
-  throw new Error(`The version of React you are using is lower than the minimum required version needed for Next.js. Please upgrade "react" and "react-dom": "npm install --save react react-dom" https://err.sh/zeit/next.js/invalid-react-version`)
-}
-
 const defaultCommand = 'dev'
 export type cliCommand = (argv?: string[]) => void
 const commands: {[command: string]: () => Promise<cliCommand>} = {
@@ -84,6 +78,14 @@ if (args['--help']) {
 const defaultEnv = command === 'dev' ? 'development' : 'production'
 process.env.NODE_ENV = process.env.NODE_ENV || defaultEnv
 
+// this needs to come after we set the correct NODE_ENV or
+// else it might cause SSR to break
+const React = require('react')
+
+if (typeof React.Suspense === 'undefined') {
+  throw new Error(`The version of React you are using is lower than the minimum required version needed for Next.js. Please upgrade "react" and "react-dom": "npm install --save react react-dom" https://err.sh/zeit/next.js/invalid-react-version`)
+}
+
 commands[command]().then((exec) => exec(forwardedArgs))
 
 if (command === 'dev') {

test/integration/ssr-ctx/pages/index.js

@@ -0,0 +1,17 @@
+import React from 'react'
+
+const Idk = React.createContext(null)
+
+export default () => {
+  return (
+    <div>
+      <Idk.Provider value='hello world'>
+        <Idk.Consumer>
+          {(idk) => (
+            <p>Value: {idk}</p>
+          )}
+        </Idk.Consumer>
+      </Idk.Provider>
+    </div>
+  )
+}

test/integration/ssr-ctx/test/index.test.js

@@ -0,0 +1,43 @@
+/* eslint-env jest */
+/* global jasmine */
+import { join } from 'path'
+import {
+  killApp,
+  findPort,
+  runNextCommand,
+  renderViaHTTP
+} from 'next-test-utils'
+
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 1000 * 30
+
+const appDir = join(__dirname, '../')
+let appPort
+let app
+
+describe('Production Usage', () => {
+  beforeAll(async () => {
+    await runNextCommand(['build', appDir])
+  })
+
+  it('should render a page with context', async () => {
+    appPort = await findPort()
+
+    await new Promise((resolve, reject) => {
+      runNextCommand(['start', appDir, '-p', appPort], {
+        instance: (child) => {
+          app = child
+          child.stdout.on('data', chunk => {
+            if (chunk.toString().match(/ready on/i)) resolve()
+          })
+          child.stderr.on('data',
+            chunk => reject(new Error('got error ' + chunk.toString()))
+          )
+        }
+      }).catch(err => reject(err))
+    })
+
+    const html = await renderViaHTTP(appPort, '/')
+    expect(html).toMatch(/Value: .*?hello world/)
+    await killApp(app)
+  })
+})

test/lib/next-test-utils.js

@@ -75,7 +75,7 @@ export function runNextCommand (argv, options = {}) {
   const nextBin = path.join(nextDir, 'dist/bin/next')
   const cwd = options.cwd || nextDir
   // Let Next.js decide the environment
-  const env = { ...process.env, ...options.env, NODE_ENV: undefined }
+  const env = { ...process.env, ...options.env, NODE_ENV: '' }
 
   return new Promise((resolve, reject) => {
     console.log(`Running command "next ${argv.join(' ')}"`)
@@ -162,7 +162,7 @@ export function nextExport (dir, { outdir }) {
 
 // Kill a launched app
 export async function killApp (instance) {
-  await fkill(instance.pid)
+  await fkill(instance.pid, { force: true })
 }
 
 export async function startApp (app) {