Use direct import to react-router.

Fix #5079.

packages/react-router-dom/modules/BrowserRouter.js

@@ -2,7 +2,7 @@ import warning from 'warning'
 import React from 'react'
 import PropTypes from 'prop-types'
 import createHistory from 'history/createBrowserHistory'
-import { Router } from 'react-router'
+import Router from './Router'
 
 /**
  * The public API for a <Router> that uses HTML5 history.

packages/react-router-dom/modules/HashRouter.js

@@ -2,7 +2,7 @@ import warning from 'warning'
 import React from 'react'
 import PropTypes from 'prop-types'
 import createHistory from 'history/createHashHistory'
-import { Router } from 'react-router'
+import Router from './Router'
 
 /**
  * The public API for a <Router> that uses window.location.hash.

packages/react-router-dom/modules/MemoryRouter.js

@@ -1 +1,3 @@
-export { MemoryRouter as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { MemoryRouter } from 'react-router'
+export default MemoryRouter

packages/react-router-dom/modules/NavLink.js

@@ -1,6 +1,6 @@
 import React from 'react'
 import PropTypes from 'prop-types'
-import { Route } from 'react-router'
+import Route from './Route'
 import Link from './Link'
 
 /**

packages/react-router-dom/modules/Prompt.js

@@ -1 +1,3 @@
-export { Prompt as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { Prompt } from 'react-router'
+export default Prompt

packages/react-router-dom/modules/Redirect.js

@@ -1 +1,3 @@
-export { Redirect as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { Redirect } from 'react-router'
+export default Redirect

packages/react-router-dom/modules/Route.js

@@ -1 +1,3 @@
-export { Route as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { Route } from 'react-router'
+export default Route

packages/react-router-dom/modules/Router.js

@@ -1 +1,3 @@
-export { Router as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { Router } from 'react-router'
+export default Router

packages/react-router-dom/modules/StaticRouter.js

@@ -1 +1,3 @@
-export { StaticRouter as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { StaticRouter } from 'react-router'
+export default StaticRouter

packages/react-router-dom/modules/Switch.js

@@ -1 +1,3 @@
-export { Switch as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { Switch } from 'react-router'
+export default Switch

packages/react-router-dom/modules/matchPath.js

@@ -1 +1,3 @@
-export { matchPath as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { matchPath } from 'react-router'
+export default matchPath

packages/react-router-dom/modules/withRouter.js

@@ -1 +1,3 @@
-export { withRouter as default } from 'react-router'
+// Written in this round about way for babel-transform-imports
+import { withRouter } from 'react-router'
+export default withRouter

packages/react-router-dom/package.json

@@ -51,6 +51,7 @@
     "babel-eslint": "^6.0.4",
     "babel-plugin-dev-expression": "^0.2.1",
     "babel-plugin-external-helpers": "^6.22.0",
+    "babel-plugin-transform-imports": "^1.2.0",
     "babel-plugin-transform-react-remove-prop-types": "^0.2.11",
     "babel-preset-es2015": "^6.14.0",
     "babel-preset-react": "^6.5.0",

packages/react-router-dom/tools/babel-preset.js

@@ -1,7 +1,13 @@
 const BABEL_ENV = process.env.BABEL_ENV
 const building = BABEL_ENV != undefined && BABEL_ENV !== 'cjs'
+const transformImports = require('babel-plugin-transform-imports');
 
-const plugins = []
+const plugins = [
+  [transformImports, {
+  'react-router': {
+    transform: building ? "react-router/es/${member}" : "react-router/${member}",
+    preventFullImport: true
+}}]]
 
 if (BABEL_ENV === 'umd') {
   plugins.push('external-helpers')