refactor: move exists-sync to a dev dependency

package.json

@@ -55,7 +55,6 @@
     "ember-cli-normalize-entity-name": "^1.0.0",
     "ember-cli-string-utils": "^1.0.0",
     "enhanced-resolve": "^2.3.0",
-    "exists-sync": "0.0.3",
     "extract-text-webpack-plugin": "^2.0.0-rc.1",
     "file-loader": "^0.8.5",
     "findup": "0.1.5",
@@ -136,6 +135,7 @@
     "conventional-changelog": "^1.1.0",
     "dtsgenerator": "^0.7.1",
     "eslint": "^2.8.0",
+    "exists-sync": "0.0.3",
     "express": "^4.14.0",
     "jasmine": "^2.4.1",
     "jasmine-spec-reporter": "^2.7.0",

packages/@angular/cli/ember-cli/lib/commands/test.js

@@ -3,7 +3,6 @@
 var Command     = require('../models/command');
 var SilentError = require('silent-error');
 var path        = require('path');
-var existsSync  = require('exists-sync');
 
 var defaultPort = 7357;
 

packages/@angular/cli/ember-cli/lib/models/addon.js

@@ -4,7 +4,7 @@
 @module ember-cli
 */
 
-var existsSync   = require('exists-sync');
+var fs           = require('fs');
 var path         = require('path');
 var assign       = require('lodash/assign');
 var SilentError  = require('silent-error');
@@ -14,6 +14,15 @@ var CoreObject = require('../ext/core-object');
 
 var walkSync   = require('walk-sync');
 
+function existsSync(path) {
+  try {
+    fs.accessSync(path);
+    return true;
+  }
+  catch (e) {
+    return false;
+  }
+}
 
 
 /**

packages/@angular/cli/ember-cli/lib/models/blueprint.js

@@ -10,7 +10,6 @@ var printableProperties = require('../utilities/printable-properties').blueprint
 var sequence            = require('../utilities/sequence');
 var printCommand        = require('../utilities/print-command');
 var fs                  = require('fs-extra');
-var existsSync          = require('exists-sync');
 var inflector           = require('inflection');
 var minimatch           = require('minimatch');
 var path                = require('path');
@@ -35,6 +34,16 @@ var EOL                 = require('os').EOL;
 var debug               = require('debug')('ember-cli:blueprint');
 var normalizeEntityName = require('ember-cli-normalize-entity-name');
 
+function existsSync(path) {
+  try {
+    fs.accessSync(path);
+    return true;
+  }
+  catch (e) {
+    return false;
+  }
+}
+
 module.exports = Blueprint;
 
 /**

packages/@angular/cli/ember-cli/lib/models/installation-checker.js

@@ -2,10 +2,19 @@
 
 var debug       = require('debug')('ember-cli:installation-checker');
 var fs          = require('fs');
-var existsSync  = require('exists-sync');
 var path        = require('path');
 var SilentError = require('silent-error');
 
+function existsSync(path) {
+  try {
+    fs.accessSync(path);
+    return true;
+  }
+  catch (e) {
+    return false;
+  }
+}
+
 module.exports = InstallationChecker;
 
 function InstallationChecker(options) {

packages/@angular/cli/ember-cli/lib/models/project.js

@@ -8,7 +8,6 @@ var path               = require('path');
 var findup             = Promise.denodeify(require('findup'));
 var resolve            = Promise.denodeify(require('resolve'));
 var fs                 = require('fs');
-var existsSync         = require('exists-sync');
 var find               = require('lodash/find');
 var assign             = require('lodash/assign');
 var forOwn             = require('lodash/forOwn');
@@ -19,6 +18,16 @@ var UI                 = require('../ui');
 var nodeModulesPath    = require('node-modules-path');
 var getPackageBaseName = require('../utilities/get-package-base-name');
 
+function existsSync(path) {
+  try {
+    fs.accessSync(path);
+    return true;
+  }
+  catch (e) {
+    return false;
+  }
+}
+
 /**
   The Project model is tied to your package.json. It is instiantiated
   by giving Project.closest the path to your project.

packages/@angular/cli/ember-cli/lib/tasks/create-and-step-into-directory.js

@@ -5,11 +5,20 @@
 
 var Promise     = require('../ext/promise');
 var fs          = require('fs');
-var existsSync  = require('exists-sync');
 var mkdir       = Promise.denodeify(fs.mkdir);
 var Task        = require('../models/task');
 var SilentError = require('silent-error');
 
+function existsSync(path) {
+  try {
+    fs.accessSync(path);
+    return true;
+  }
+  catch (e) {
+    return false;
+  }
+}
+
 module.exports = Task.extend({
   // Options: String directoryName, Boolean: dryRun
 

packages/@angular/cli/package.json

@@ -44,7 +44,6 @@
     "diff": "^2.2.2",
     "ember-cli-normalize-entity-name": "^1.0.0",
     "ember-cli-string-utils": "^1.0.0",
-    "exists-sync": "0.0.3",
     "extract-text-webpack-plugin": "^2.0.0-rc.1",
     "file-loader": "^0.8.5",
     "findup": "0.1.5",