Make sure dynamic imports works on Windows (vercel#3641)

* Make sure dynamic imports works on Windows

* Fix an issue with the load test firmware.

* Fix symlink creation on Unix

Author: arunoda

.gitignore

@@ -5,6 +5,7 @@ dist
 # dependencies
 node_modules
 package-lock.json
+test/node_modules
 
 # logs
 *.log

package.json

@@ -126,12 +126,14 @@
     "husky": "0.14.3",
     "jest-cli": "21.2.0",
     "lint-staged": "4.2.3",
+    "mkdirp": "0.5.1",
     "node-fetch": "1.7.3",
     "node-notifier": "5.1.2",
     "nyc": "11.2.1",
     "portfinder": "1.0.13",
     "react": "16.2.0",
     "react-dom": "16.2.0",
+    "rimraf": "2.6.2",
     "standard": "9.0.2",
     "taskr": "1.1.0",
     "wd": "1.4.1"

server/build/plugins/nextjs-ssr-import.js

@@ -1,4 +1,4 @@
-import { join, sep } from 'path'
+import { join } from 'path'
 
 // This plugin modifies the require-ensure code generated by Webpack
 // to work with Next.js SSR
@@ -13,7 +13,10 @@ export default class NextJsSsrImportPlugin {
       compilation.mainTemplate.plugin('require-ensure', (code) => {
         // Update to load chunks from our custom chunks directory
         const chunksDirPath = join(this.dir, this.dist, 'dist')
-        let updatedCode = code.replace('require("./"', `require("${chunksDirPath}${sep}"`)
+        // Make sure even in windows, the path looks like in unix
+        // Node.js require system will convert it accordingly
+        const chunksDirPathNormalized = chunksDirPath.replace(/\\/g, '/')
+        let updatedCode = code.replace('require("./"', `require("${chunksDirPathNormalized}/"`)
 
         // Replace a promise equivalent which runs in the same loop
         // If we didn't do this webpack's module loading process block us from

taskfile.js

@@ -1,5 +1,7 @@
 const notifier = require('node-notifier')
 const childProcess = require('child_process')
+const rimraf = require('rimraf')
+const mkdirp = require('mkdirp')
 const isWindows = /^win/.test(process.platform)
 
 export async function compile (task) {
@@ -26,12 +28,21 @@ export async function client (task, opts) {
   notify('Compiled client files')
 }
 
+// Create node_modules/next for the use of test apps
+export async function symlinkNextForTesting () {
+  rimraf.sync('test/node_modules/next')
+  mkdirp.sync('test/node_modules')
+
+  const symlinkCommand = isWindows ? 'mklink /D "next" "..\\..\\"' : 'ln -s ../../ next'
+  childProcess.execSync(symlinkCommand, { cwd: 'test/node_modules' })
+}
+
 export async function copy (task) {
   await task.source('pages/**/*.js').target('dist/pages')
 }
 
 export async function build (task) {
-  await task.serial(['copy', 'compile'])
+  await task.serial(['symlinkNextForTesting', 'copy', 'compile'])
 }
 
 export default async function (task) {
@@ -53,8 +64,10 @@ export async function release (task) {
 // the lifetime of the original npm script.
 
 export async function pretest (task) {
+  // Start chromedriver
   const processName = isWindows ? 'chromedriver.cmd' : 'chromedriver'
   childProcess.spawn(processName, { stdio: 'inherit' })
+
   // We need to do this, otherwise this task's process will keep waiting.
   setTimeout(() => process.exit(0), 2000)
 }

test/node_modules/next

@@ -4083,7 +4083,7 @@ [email protected]:
   dependencies:
     minimist "0.0.8"
 
-[email protected], "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0, mkdirp@~0.5.1:
+[email protected].1, [email protected].x, "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0, mkdirp@~0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
@@ -5123,7 +5123,7 @@ right-align@^0.1.1:
   dependencies:
     align-text "^0.1.1"
 
-rimraf@2, rimraf@^2.2.8, rimraf@^2.3.3, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
+rimraf@2, rimraf@2.6.2, rimraf@^2.2.8, rimraf@^2.3.3, rimraf@^2.5.1, rimraf@^2.5.4, rimraf@^2.6.1:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.2.tgz#2ed8150d24a16ea8651e6d6ef0f47c4158ce7a36"
   dependencies: