From a056ac35faf300a4af4102321976861ea0bfe988 Mon Sep 17 00:00:00 2001
From: Haoqun Jiang <haoqunjiang@gmail.com>
Date: Thu, 23 Jan 2020 14:08:50 +0800
Subject: [PATCH] refactor: use createRequire to load/resolve modules (#5092)

* refactor: use createRequire to resolve modules

* fix: use file path as createRequire argument; fix loadModule.
---
 packages/@vue/cli-shared-utils/lib/module.js | 46 +++++++++++++++-----
 1 file changed, 34 insertions(+), 12 deletions(-)

diff --git a/packages/@vue/cli-shared-utils/lib/module.js b/packages/@vue/cli-shared-utils/lib/module.js
index 117b98f3ec..2ef18fa92c 100644
--- a/packages/@vue/cli-shared-utils/lib/module.js
+++ b/packages/@vue/cli-shared-utils/lib/module.js
@@ -1,18 +1,34 @@
+const Module = require('module')
+const path = require('path')
+
 const semver = require('semver')
 
+// https://github.com/benmosher/eslint-plugin-import/pull/1591
+// https://github.com/benmosher/eslint-plugin-import/pull/1602
+// Polyfill Node's `Module.createRequireFromPath` if not present (added in Node v10.12.0)
+// Use `Module.createRequire` if available (added in Node v12.2.0)
+const createRequire = Module.createRequire || Module.createRequireFromPath || function (filename) {
+  const mod = new Module(filename, null)
+  mod.filename = filename
+  mod.paths = Module._nodeModulePaths(path.dirname(filename))
+
+  mod._compile(`module.exports = require;`, filename)
+
+  return mod.exports
+}
+
 function resolveFallback (request, options) {
-  const Module = require('module')
   const isMain = false
   const fakeParent = new Module('', null)
 
   const paths = []
 
   for (let i = 0; i < options.paths.length; i++) {
-    const path = options.paths[i]
-    fakeParent.paths = Module._nodeModulePaths(path)
+    const p = options.paths[i]
+    fakeParent.paths = Module._nodeModulePaths(p)
     const lookupPaths = Module._resolveLookupPaths(request, fakeParent, true)
 
-    if (!paths.includes(path)) paths.push(path)
+    if (!paths.includes(p)) paths.push(p)
 
     for (let j = 0; j < lookupPaths.length; j++) {
       if (!paths.includes(lookupPaths[j])) paths.push(lookupPaths[j])
@@ -35,20 +51,26 @@ const resolve = semver.satisfies(process.version, '>=10.0.0')
 exports.resolveModule = function (request, context) {
   let resolvedPath
   try {
-    resolvedPath = resolve(request, {
-      paths: [context]
-    })
+    try {
+      resolvedPath = createRequire(path.resolve(context, 'package.json')).resolve(request)
+    } catch (e) {
+      resolvedPath = resolve(request, { paths: [context] })
+    }
   } catch (e) {}
   return resolvedPath
 }
 
 exports.loadModule = function (request, context, force = false) {
-  const resolvedPath = exports.resolveModule(request, context)
-  if (resolvedPath) {
-    if (force) {
-      clearRequireCache(resolvedPath)
+  try {
+    return createRequire(path.resolve(context, 'package.json'))(request)
+  } catch (e) {
+    const resolvedPath = exports.resolveModule(request, context)
+    if (resolvedPath) {
+      if (force) {
+        clearRequireCache(resolvedPath)
+      }
+      return require(resolvedPath)
     }
-    return require(resolvedPath)
   }
 }