Use pre node@4 compatible `path-exists` (#685)

* Revert "Add ES5 version of `path-exists` to CLI"

This reverts commit fc3ab46d.

* Use pre node@4 compatible `path-exists`

Ref #617

packages/create-react-app/index.js

@@ -44,6 +44,7 @@ var spawn = require('cross-spawn');
 var chalk = require('chalk');
 var semver = require('semver');
 var argv = require('minimist')(process.argv.slice(2));
+var pathExists = require('path-exists');
 
 /**
  * Arguments:
@@ -75,7 +76,7 @@ function createApp(name, verbose, version) {
 
   checkAppName(appName);
 
-  if (!pathExistsSync(name)) {
+  if (!pathExists.sync(name)) {
     fs.mkdirSync(root);
   } else if (!isSafeToCreateProjectIn(root)) {
     console.log('The directory `' + name + '` contains file(s) that could conflict. Aborting.');
@@ -219,16 +220,3 @@ function isSafeToCreateProjectIn(root) {
       return validFiles.indexOf(file) >= 0;
     });
 }
-
-// This is an ES5 version of https://github.com/sindresorhus/path-exists.
-// The reason it exists is so that the CLI doesn't break before being able to
-// warn the user they're using an unsupported version of Node.
-// See https://github.com/facebookincubator/create-react-app/issues/570
-function pathExistsSync(fp) {
-  try {
-    fs.accessSync(fp);
-    return true;
-  } catch (err) {
-    return false;
-  }
-}

packages/create-react-app/package.json

@@ -23,6 +23,7 @@
     "chalk": "^1.1.1",
     "cross-spawn": "^4.0.0",
     "minimist": "^1.2.0",
+    "path-exists": "^2.1.0",
     "semver": "^5.0.3"
   }
 }

packages/react-scripts/package.json

@@ -58,7 +58,7 @@
     "json-loader": "0.5.4",
     "object-assign": "4.1.0",
     "opn": "4.0.2",
-    "path-exists": "3.0.0",
+    "path-exists": "2.1.0",
     "postcss-loader": "0.13.0",
     "promise": "7.1.1",
     "recursive-readdir": "2.0.0",