diff --git a/packager/react-packager/src/DependencyResolver/DependencyGraph/DeprecatedAssetMap.js b/packager/react-packager/src/DependencyResolver/DependencyGraph/DeprecatedAssetMap.js
index fb0f6f166..aedfa4ce0 100644
--- a/packager/react-packager/src/DependencyResolver/DependencyGraph/DeprecatedAssetMap.js
+++ b/packager/react-packager/src/DependencyResolver/DependencyGraph/DeprecatedAssetMap.js
@@ -22,7 +22,7 @@ class DeprecatedAssetMap {
     fileWatcher,
     ignoreFilePath,
     helpers,
-    activity
+    activity,
   }) {
     if (roots == null || roots.length === 0) {
       this._disabled = true;
@@ -85,9 +85,9 @@ class DeprecatedAssetMap {
   }
 
   _processAsset(file) {
-    let ext = this._helpers.extname(file);
+    const ext = this._helpers.extname(file);
     if (this._assetExts.indexOf(ext) !== -1) {
-      let name = assetName(file, ext);
+      const name = assetName(file, ext);
       if (this._map[name] != null) {
         debug('Conflcting assets', name);
       }
diff --git a/packager/react-packager/src/DependencyResolver/DependencyGraph/HasteMap.js b/packager/react-packager/src/DependencyResolver/DependencyGraph/HasteMap.js
index 75cd43f9c..c2101591a 100644
--- a/packager/react-packager/src/DependencyResolver/DependencyGraph/HasteMap.js
+++ b/packager/react-packager/src/DependencyResolver/DependencyGraph/HasteMap.js
@@ -25,12 +25,12 @@ class HasteMap {
     this._map = Object.create(null);
 
     let promises = this._fastfs.findFilesByExt('js', {
-      ignore: (file) => this._helpers.isNodeModulesDir(file)
+      ignore: (file) => this._helpers.isNodeModulesDir(file),
     }).map(file => this._processHasteModule(file));
 
     promises = promises.concat(
       this._fastfs.findFilesByName('package.json', {
-        ignore: (file) => this._helpers.isNodeModulesDir(file)
+        ignore: (file) => this._helpers.isNodeModulesDir(file),
       }).map(file => this._processHastePackage(file))
     );
 
@@ -41,9 +41,9 @@ class HasteMap {
     return Promise.resolve().then(() => {
       /*eslint no-labels: 0 */
       if (type === 'delete' || type === 'change') {
-        loop: for (let name in this._map) {
+        loop: for (const name in this._map) {
           const modulesMap = this._map[name];
-          for (let platform in modulesMap) {
+          for (const platform in modulesMap) {
             const module = modulesMap[platform];
             if (module.path === absPath) {
               delete modulesMap[platform];
@@ -53,7 +53,7 @@ class HasteMap {
         }
 
         if (type === 'delete') {
-          return;
+          return null;
         }
       }
 
diff --git a/packager/react-packager/src/DependencyResolver/DependencyGraph/ResolutionResponse.js b/packager/react-packager/src/DependencyResolver/DependencyGraph/ResolutionResponse.js
index d29ff225f..323e2e8dc 100644
--- a/packager/react-packager/src/DependencyResolver/DependencyGraph/ResolutionResponse.js
+++ b/packager/react-packager/src/DependencyResolver/DependencyGraph/ResolutionResponse.js
@@ -51,7 +51,7 @@ class ResolutionResponse {
     this.dependencies.unshift(module);
   }
 
-  pushAsyncDependency(dependency){
+  pushAsyncDependency(dependency) {
     this._assertNotFinalized();
     this.asyncDependencies.push(dependency);
   }
diff --git a/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js b/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js
index b3a57c657..f43765e44 100644
--- a/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js
+++ b/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js
@@ -48,7 +48,7 @@ describe('DependencyGraph', function() {
       on: function() {
         return this;
       },
-      isWatchman: () => Promise.resolve(false)
+      isWatchman: () => Promise.resolve(false),
     };
 
     defaults = {
@@ -78,14 +78,14 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'require("a")'
+            'require("a")',
           ].join('\n'),
           'a.js': [
             '/**',
             ' * @providesModule a',
             ' */',
           ].join('\n'),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -104,7 +104,7 @@ describe('DependencyGraph', function() {
               isJSON: false,
               isPolyfill: false,
               resolution: undefined,
-              resolveDependency: undefined
+              resolveDependency: undefined,
             },
             {
               id: 'a',
@@ -115,7 +115,7 @@ describe('DependencyGraph', function() {
               isJSON: false,
               isPolyfill: false,
               resolution: undefined,
-              resolveDependency: undefined
+              resolveDependency: undefined,
             },
           ]);
       });
@@ -129,7 +129,7 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'require("a")'
+            'require("a")',
           ].join('\n'),
           'a.js': [
             '/**',
@@ -141,7 +141,7 @@ describe('DependencyGraph', function() {
             ' * @providesModule a',
             ' */',
           ].join('\n'),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -180,18 +180,18 @@ describe('DependencyGraph', function() {
       fs.__setMockFilesystem({
         'root': {
           'package.json': JSON.stringify({
-            name: 'package'
+            name: 'package',
           }),
           'index.js': [
             '/**',
             ' * @providesModule index',
             ' */',
             'require("./a.json")',
-            'require("./b")'
+            'require("./b")',
           ].join('\n'),
           'a.json': JSON.stringify({}),
           'b.json': JSON.stringify({}),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -240,7 +240,7 @@ describe('DependencyGraph', function() {
       fs.__setMockFilesystem({
         'root': {
           'package.json': JSON.stringify({
-            name: 'package'
+            name: 'package',
           }),
           'index.js': [
             '/**',
@@ -248,7 +248,7 @@ describe('DependencyGraph', function() {
             ' */',
             'require("./package.json")',
           ].join('\n'),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -290,12 +290,12 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'require("image!a")'
+            'require("image!a")',
           ].join('\n'),
           'imgs': {
-            'a.png': ''
+            'a.png': '',
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -338,15 +338,15 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'require("./imgs/a.png")'
+            'require("./imgs/a.png")',
           ].join('\n'),
           'imgs': {
-            'a.png': ''
+            'a.png': '',
           },
           'package.json': JSON.stringify({
-            name: 'rootPackage'
+            name: 'rootPackage',
           }),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -399,9 +399,9 @@ describe('DependencyGraph', function() {
             'c@2x.png': '',
           },
           'package.json': JSON.stringify({
-            name: 'rootPackage'
+            name: 'rootPackage',
           }),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -478,9 +478,9 @@ describe('DependencyGraph', function() {
             'c@2x.ios.png': '',
           },
           'package.json': JSON.stringify({
-            name: 'rootPackage'
+            name: 'rootPackage',
           }),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -551,12 +551,12 @@ describe('DependencyGraph', function() {
             'require("image!a")',
           ].join('\n'),
           'imgs': {
-            'a.png': ''
+            'a.png': '',
           },
           'package.json': JSON.stringify({
-            name: 'rootPackage'
+            name: 'rootPackage',
           }),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -617,7 +617,7 @@ describe('DependencyGraph', function() {
             ' */',
             'require("index")',
           ].join('\n'),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -664,11 +664,11 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
-            'main.js': 'lol'
-          }
-        }
+            'main.js': 'lol',
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -715,11 +715,11 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
-            'main.js': 'lol'
-          }
-        }
+            'main.js': 'lol',
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -767,18 +767,18 @@ describe('DependencyGraph', function() {
           'sha.js': {
             'package.json': JSON.stringify({
               name: 'sha.js',
-              main: 'main.js'
+              main: 'main.js',
             }),
-            'main.js': 'lol'
+            'main.js': 'lol',
           },
           'x.y.z': {
             'package.json': JSON.stringify({
               name: 'x.y.z',
-              main: 'main.js'
+              main: 'main.js',
             }),
-            'main.js': 'lol'
-          }
-        }
+            'main.js': 'lol',
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -832,8 +832,8 @@ describe('DependencyGraph', function() {
               name: 'aPackage',
             }),
             'index.js': 'lol',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -881,8 +881,8 @@ describe('DependencyGraph', function() {
               ' * @providesModule EpicModule',
               ' */',
             ].join('\n'),
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -929,8 +929,8 @@ describe('DependencyGraph', function() {
             lib: {
               'index.js': 'lol',
             },
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -975,7 +975,7 @@ describe('DependencyGraph', function() {
           lib: {
             'index.js': 'lol',
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1024,7 +1024,7 @@ describe('DependencyGraph', function() {
             'index.js': 'lol',
             'main.js': 'lol',
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1069,9 +1069,9 @@ describe('DependencyGraph', function() {
           ].join('\n'),
           'aPackage': {
             'package.json': 'lol',
-            'main.js': 'lol'
-          }
-        }
+            'main.js': 'lol',
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1109,7 +1109,7 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
           ].join('\n'),
-        }
+        },
       });
 
       const _exit = process.exit;
@@ -1140,8 +1140,8 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("lolomg")',
-          ].join('\n')
-        }
+          ].join('\n'),
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1161,7 +1161,7 @@ describe('DependencyGraph', function() {
               isPolyfill: false,
               resolution: undefined,
               resolveDependency: undefined,
-            }
+            },
           ]);
       });
     });
@@ -1179,14 +1179,14 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'lol',
             'subdir': {
-              'lolynot.js': 'lolynot'
-            }
-          }
-        }
+              'lolynot.js': 'lolynot',
+            },
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1228,12 +1228,12 @@ describe('DependencyGraph', function() {
         'symlinkedPackage': {
           'package.json': JSON.stringify({
             name: 'aPackage',
-            main: 'main.js'
+            main: 'main.js',
           }),
           'main.js': 'lol',
           'subdir': {
-            'lolynot.js': 'lolynot'
-          }
+            'lolynot.js': 'lolynot',
+          },
         },
         'root': {
           'index.js': [
@@ -1243,7 +1243,7 @@ describe('DependencyGraph', function() {
             'require("aPackage/subdir/lolynot")',
           ].join('\n'),
           'aPackage': { SYMLINK: '/symlinkedPackage' },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1292,15 +1292,15 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'require("./subdir/lolynot")',
             'subdir': {
-              'lolynot.js': 'require("../other")'
+              'lolynot.js': 'require("../other")',
             },
-            'other.js': 'some code'
-          }
-        }
+            'other.js': 'some code',
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1376,8 +1376,8 @@ describe('DependencyGraph', function() {
             }),
             'main.js': 'some other code',
             'client.js': 'some code',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1431,8 +1431,8 @@ describe('DependencyGraph', function() {
             }),
             'main.js': 'some other code',
             'client.js': 'some code',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1486,8 +1486,8 @@ describe('DependencyGraph', function() {
             }),
             'main.js': 'some other code',
             'client.js': 'some code',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1541,8 +1541,8 @@ describe('DependencyGraph', function() {
             }),
             'main.js': 'some other code',
             'client.js': 'some code',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1611,8 +1611,8 @@ describe('DependencyGraph', function() {
             },
             'hello.js': 'hello',
             'bye.js': 'bye',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1697,7 +1697,7 @@ describe('DependencyGraph', function() {
               name: 'aPackage',
               browser: {
                 'node-package': 'browser-package',
-              }
+              },
             }),
             'index.js': 'require("node-package")',
             'node-package': {
@@ -1712,8 +1712,8 @@ describe('DependencyGraph', function() {
               }),
               'index.js': 'some browser code',
             },
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1782,7 +1782,7 @@ describe('DependencyGraph', function() {
                   }),
                   'main.js': 'bar 1 module',
                 },
-              }
+              },
             },
             'bar': {
               'package.json': JSON.stringify({
@@ -1792,7 +1792,7 @@ describe('DependencyGraph', function() {
               'main.js': 'bar 2 module',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1867,12 +1867,12 @@ describe('DependencyGraph', function() {
             'bar': {
               'package.json': JSON.stringify({
                 name: 'bar',
-                main: 'main'
+                main: 'main',
               }),
               'main.ios.js': '',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -1912,7 +1912,7 @@ describe('DependencyGraph', function() {
               isPolyfill: false,
               resolution: undefined,
             },
-         ]);
+          ]);
       });
     });
 
@@ -1943,7 +1943,7 @@ describe('DependencyGraph', function() {
                   'main.js': 'bar 1 module',
                   'lol.js': '',
                 },
-              }
+              },
             },
             'bar': {
               'package.json': JSON.stringify({
@@ -1953,7 +1953,7 @@ describe('DependencyGraph', function() {
               'main.js': 'bar 2 module',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2031,14 +2031,14 @@ describe('DependencyGraph', function() {
                     name: 'bar',
                     main: 'main.js',
                     browser: {
-                      './lol': './wow'
-                    }
+                      './lol': './wow',
+                    },
                   }),
                   'main.js': 'bar 1 module',
                   'lol.js': '',
                   'wow.js': '',
                 },
-              }
+              },
             },
             'bar': {
               'package.json': JSON.stringify({
@@ -2048,7 +2048,7 @@ describe('DependencyGraph', function() {
               'main2.js': 'bar 2 module',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2132,7 +2132,7 @@ describe('DependencyGraph', function() {
             },
             'node_modules': {},
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2220,7 +2220,7 @@ describe('DependencyGraph', function() {
                   }),
                   'main.js': 'log()',
                 },
-              }
+              },
             },
             'ember': {
               'package.json': JSON.stringify({
@@ -2235,7 +2235,7 @@ describe('DependencyGraph', function() {
               ].join('\n'),
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2302,7 +2302,7 @@ describe('DependencyGraph', function() {
               ].join('\n'),
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2357,7 +2357,7 @@ describe('DependencyGraph', function() {
               'main.js': 'foo module',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2395,12 +2395,12 @@ describe('DependencyGraph', function() {
             'sha.js': {
               'package.json': JSON.stringify({
                 name: 'sha.js',
-                main: 'main.js'
+                main: 'main.js',
               }),
-              'main.js': 'lol'
-            }
-          }
-        }
+              'main.js': 'lol',
+            },
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2459,7 +2459,7 @@ describe('DependencyGraph', function() {
              * @providesModule a
              */
           `,
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2518,7 +2518,7 @@ describe('DependencyGraph', function() {
              * @providesModule a
              */
           `,
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2565,7 +2565,7 @@ describe('DependencyGraph', function() {
           'a.ios.js': '',
           'a.android.js': '',
           'a.js': '',
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2625,7 +2625,7 @@ describe('DependencyGraph', function() {
               'main.js': 'require("./package.json")',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2684,7 +2684,7 @@ describe('DependencyGraph', function() {
   describe('file watch updating', function() {
     var triggerFileChange;
     var mockStat = {
-      isDirectory: () => false
+      isDirectory: () => false,
     };
 
     beforeEach(function() {
@@ -2713,22 +2713,22 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("aPackage")',
-            'require("foo")'
+            'require("foo")',
           ].join('\n'),
           'foo': [
             '/**',
             ' * @providesModule foo',
             ' */',
-            'require("aPackage")'
+            'require("aPackage")',
           ].join('\n'),
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2776,22 +2776,22 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("aPackage")',
-            'require("foo")'
+            'require("foo")',
           ].join('\n'),
           'foo.js': [
             '/**',
             ' * @providesModule foo',
             ' */',
-            'require("aPackage")'
+            'require("aPackage")',
           ].join('\n'),
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2839,22 +2839,22 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("aPackage")',
-            'require("foo")'
+            'require("foo")',
           ].join('\n'),
           'foo.js': [
             '/**',
             ' * @providesModule foo',
             ' */',
-            'require("aPackage")'
+            'require("aPackage")',
           ].join('\n'),
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2887,7 +2887,7 @@ describe('DependencyGraph', function() {
                 isPolyfill: false,
                 resolution: undefined,
               },
-          ]);
+            ]);
         });
       });
     });
@@ -2901,22 +2901,22 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("aPackage")',
-            'require("foo")'
+            'require("foo")',
           ].join('\n'),
           'foo.js': [
             '/**',
             ' * @providesModule foo',
             ' */',
-            'require("aPackage")'
+            'require("aPackage")',
           ].join('\n'),
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -2928,7 +2928,7 @@ describe('DependencyGraph', function() {
           '/**',
           ' * @providesModule bar',
           ' */',
-          'require("foo")'
+          'require("foo")',
         ].join('\n');
         triggerFileChange('add', 'bar.js', root, mockStat);
 
@@ -2980,7 +2980,7 @@ describe('DependencyGraph', function() {
                 resolution: undefined,
                 resolveDependency: undefined,
               },
-          ]);
+            ]);
         });
       });
     });
@@ -2993,7 +2993,7 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'require("image!foo")'
+            'require("image!foo")',
           ].join('\n'),
         },
       });
@@ -3018,7 +3018,7 @@ describe('DependencyGraph', function() {
               isPolyfill: false,
               resolution: undefined,
               resolveDependency: undefined,
-            }
+            },
           ]);
 
         filesystem.root['foo.png'] = '';
@@ -3062,10 +3062,10 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'require("./foo.png")'
+            'require("./foo.png")',
           ].join('\n'),
           'package.json': JSON.stringify({
-            name: 'aPackage'
+            name: 'aPackage',
           }),
         },
       });
@@ -3088,7 +3088,7 @@ describe('DependencyGraph', function() {
               isPolyfill: false,
               resolution: undefined,
               resolveDependency: undefined,
-            }
+            },
           ]);
 
         filesystem.root['foo.png'] = '';
@@ -3118,8 +3118,8 @@ describe('DependencyGraph', function() {
                 isJSON: false,
                 isPolyfill: false,
                 resolveDependency: undefined,
-            },
-          ]);
+              },
+            ]);
         });
       });
     });
@@ -3133,22 +3133,22 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("aPackage")',
-            'require("foo")'
+            'require("foo")',
           ].join('\n'),
           'foo.js': [
             '/**',
             ' * @providesModule foo',
             ' */',
-            'require("aPackage")'
+            'require("aPackage")',
           ].join('\n'),
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3166,7 +3166,7 @@ describe('DependencyGraph', function() {
           '/**',
           ' * @providesModule bar',
           ' */',
-          'require("foo")'
+          'require("foo")',
         ].join('\n');
         triggerFileChange('add', 'bar.js', root, mockStat);
 
@@ -3223,22 +3223,22 @@ describe('DependencyGraph', function() {
             ' * @providesModule index',
             ' */',
             'require("aPackage")',
-            'require("foo")'
+            'require("foo")',
           ].join('\n'),
           'foo.js': [
             '/**',
             ' * @providesModule foo',
             ' */',
-            'require("aPackage")'
+            'require("aPackage")',
           ].join('\n'),
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
       var dgraph = new DependencyGraph({
         ...defaults,
@@ -3246,7 +3246,7 @@ describe('DependencyGraph', function() {
       });
       return getOrderedDependenciesAsJSON(dgraph, '/root/index.js').then(function() {
         triggerFileChange('change', 'aPackage', '/root', {
-          isDirectory: function(){ return true; }
+          isDirectory: () => true,
         });
         return getOrderedDependenciesAsJSON(dgraph, '/root/index.js').then(function(deps) {
           expect(deps)
@@ -3302,11 +3302,11 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3366,12 +3366,12 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
             'browser.js': 'browser',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3429,12 +3429,12 @@ describe('DependencyGraph', function() {
           'aPackage': {
             'package.json': JSON.stringify({
               name: 'aPackage',
-              main: 'main.js'
+              main: 'main.js',
             }),
             'main.js': 'main',
             'browser.js': 'browser',
-          }
-        }
+          },
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3492,10 +3492,10 @@ describe('DependencyGraph', function() {
                   }),
                   'main.js': 'bar 1 module',
                 },
-              }
+              },
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3593,7 +3593,7 @@ describe('DependencyGraph', function() {
               'browser.js': 'foo module',
             },
           },
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3648,14 +3648,14 @@ describe('DependencyGraph', function() {
             '/**',
             ' * @providesModule index',
             ' */',
-            'System.import("a")'
+            'System.import("a")',
           ].join('\n'),
           'a.js': [
             '/**',
             ' * @providesModule a',
             ' */',
           ].join('\n'),
-        }
+        },
       });
 
       var dgraph = new DependencyGraph({
@@ -3663,13 +3663,13 @@ describe('DependencyGraph', function() {
         roots: [root],
       });
 
-    return dgraph.getDependencies('/root/index.js')
-      .then(response => response.finalize())
-      .then(({ asyncDependencies }) => {
-        expect(asyncDependencies).toEqual([
-          ['/root/a.js']
-        ]);
-      });
+      return dgraph.getDependencies('/root/index.js')
+        .then(response => response.finalize())
+        .then(({ asyncDependencies }) => {
+          expect(asyncDependencies).toEqual([
+            ['/root/a.js'],
+          ]);
+        });
     });
   });
 });
diff --git a/packager/react-packager/src/DependencyResolver/Module.js b/packager/react-packager/src/DependencyResolver/Module.js
index 7d4b62461..79a88f16b 100644
--- a/packager/react-packager/src/DependencyResolver/Module.js
+++ b/packager/react-packager/src/DependencyResolver/Module.js
@@ -145,7 +145,7 @@ class Module {
  */
 const blockCommentRe = /\/\*(.|\n)*?\*\//g;
 const lineCommentRe = /\/\/.+(\n|$)/g;
-function extractRequires(code /*: string*/) /*: Array<string>*/ {
+function extractRequires(code) {
   var deps = {
     sync: [],
     async: [],
diff --git a/packager/react-packager/src/DependencyResolver/ModuleCache.js b/packager/react-packager/src/DependencyResolver/ModuleCache.js
index a7e293223..8ea52c00e 100644
--- a/packager/react-packager/src/DependencyResolver/ModuleCache.js
+++ b/packager/react-packager/src/DependencyResolver/ModuleCache.js
@@ -43,7 +43,7 @@ class ModuleCache {
 
   getPackage(filePath) {
     filePath = path.resolve(filePath);
-    if (!this._packageCache[filePath]){
+    if (!this._packageCache[filePath]) {
       this._packageCache[filePath] = new Package(
         filePath,
         this._fastfs,
diff --git a/packager/react-packager/src/DependencyResolver/__tests__/Module-test.js b/packager/react-packager/src/DependencyResolver/__tests__/Module-test.js
index 21ca62882..5b16b8e40 100644
--- a/packager/react-packager/src/DependencyResolver/__tests__/Module-test.js
+++ b/packager/react-packager/src/DependencyResolver/__tests__/Module-test.js
@@ -51,7 +51,7 @@ describe('Module', () => {
       fs.__setMockFilesystem({
         'root': {
           'index.js': 'System.import("dep1")',
-        }
+        },
       });
 
       return expectAsyncDependenciesToEqual([['dep1']]);
@@ -61,7 +61,7 @@ describe('Module', () => {
       fs.__setMockFilesystem({
         'root': {
           'index.js': 'System.import(\'dep1\')',
-        }
+        },
       });
 
       return expectAsyncDependenciesToEqual([['dep1']]);
@@ -74,7 +74,7 @@ describe('Module', () => {
             'System.import("dep1")',
             'System.import("dep2")',
           ].join('\n'),
-        }
+        },
       });
 
       return expectAsyncDependenciesToEqual([
@@ -87,7 +87,7 @@ describe('Module', () => {
       fs.__setMockFilesystem({
         'root': {
           'index.js': 'System.import(\n"dep1"\n)',
-        }
+        },
       });
 
       return expectAsyncDependenciesToEqual([['dep1']]);
diff --git a/packager/react-packager/src/DependencyResolver/fastfs.js b/packager/react-packager/src/DependencyResolver/fastfs.js
index 9347cf408..363090bfd 100644
--- a/packager/react-packager/src/DependencyResolver/fastfs.js
+++ b/packager/react-packager/src/DependencyResolver/fastfs.js
@@ -142,7 +142,7 @@ class Fastfs extends EventEmitter {
   }
 
   matches(dir, pattern) {
-    let dirFile = this._getFile(dir);
+    const dirFile = this._getFile(dir);
     if (!dirFile.isDir) {
       throw new Error(`Expected file ${dirFile.path} to be a directory`);
     }
@@ -154,7 +154,7 @@ class Fastfs extends EventEmitter {
 
   _getRoot(filePath) {
     for (let i = 0; i < this._roots.length; i++) {
-      let possibleRoot = this._roots[i];
+      const possibleRoot = this._roots[i];
       if (isDescendant(possibleRoot.path, filePath)) {
         return possibleRoot;
       }
@@ -264,7 +264,7 @@ class File {
     /*eslint consistent-this:0*/
     let file = this;
     for (let i = 0; i < parts.length; i++) {
-      let fileName = parts[i];
+      const fileName = parts[i];
       if (!fileName) {
         continue;
       }
diff --git a/packager/react-packager/src/DependencyResolver/lib/getPlatformExtension.js b/packager/react-packager/src/DependencyResolver/lib/getPlatformExtension.js
index 417cd866c..cfcb65016 100644
--- a/packager/react-packager/src/DependencyResolver/lib/getPlatformExtension.js
+++ b/packager/react-packager/src/DependencyResolver/lib/getPlatformExtension.js
@@ -8,8 +8,6 @@
  */
 'use strict';
 
-const path = require('path');
-
 const SUPPORTED_PLATFORM_EXTS = ['android', 'ios', 'web'];
 
 const re = new RegExp(