Fix internal linting setup and add missing headers (#1741)

Author: gaearon

.eslintignore

@@ -0,0 +1,5 @@
+node_modules/
+build
+my-app*
+packages/react-scripts/template
+packages/react-scripts/fixtures

packages/react-scripts/.babelrc renamed to packages/react-scripts/babelrc

@@ -1,4 +1,15 @@
 #!/usr/bin/env node
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+'use strict';
+
 var spawn = require('cross-spawn');
 var script = process.argv[2];
 var args = process.argv.slice(3);

packages/react-scripts/bin/react-scripts.js

@@ -8,6 +8,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 // @remove-on-eject-end
+'use strict';
 
 // Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
 // injected into the application via DefinePlugin in Webpack configuration.

packages/react-scripts/config/env.js

@@ -6,6 +6,8 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
+'use strict';
+
 const babelJest = require('babel-jest');
 
 module.exports = babelJest.createTransformer({

packages/react-scripts/config/jest/babelTransform.js

@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 // @remove-on-eject-end
+'use strict';
 
 // This is a custom Jest transformer turning style imports into empty objects.
 // http://facebook.github.io/jest/docs/tutorial-webpack.html
@@ -15,7 +16,7 @@ module.exports = {
   process() {
     return 'module.exports = {};';
   },
-  getCacheKey(fileData, filename) {
+  getCacheKey() {
     // The output is always the same.
     return 'cssTransform';
   },

packages/react-scripts/config/jest/cssTransform.js

@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 // @remove-on-eject-end
+'use strict';
 
 const path = require('path');
 

packages/react-scripts/config/jest/fileTransform.js

@@ -8,6 +8,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 // @remove-on-eject-end
+'use strict';
 
 var path = require('path');
 var fs = require('fs');

packages/react-scripts/config/paths.js

@@ -8,6 +8,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 // @remove-on-eject-end
+'use strict';
 
 if (typeof Promise === 'undefined') {
   // Rejection tracking prevents a common issue where React gets into an

packages/react-scripts/config/polyfills.js

@@ -8,6 +8,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 // @remove-on-eject-end
+'use strict';
 
 var autoprefixer = require('autoprefixer');
 var webpack = require('webpack');
@@ -186,7 +187,7 @@ module.exports = {
   // @remove-on-eject-begin
   // Point ESLint to our predefined config.
   eslint: {
-    configFile: path.join(__dirname, '../.eslintrc'),
+    configFile: path.join(__dirname, '../eslintrc'),
     useEslintrc: false,
   },
   // @remove-on-eject-end