Add upstream

wp-content/plugins/jetpack/modules/.eslintrc.js

@@ -0,0 +1,40 @@
+module.exports = {
+	plugins: [ 'es5' ],
+	extends: [ 'eslint:recommended', 'plugin:es5/no-es2015' ],
+	env: {
+		browser: true,
+		jquery: true,
+	},
+	globals: {
+		_: false,
+		Backbone: false,
+		// jQuery: false,
+		wp: false,
+	},
+	parserOptions: {
+		ecmaVersion: 5,
+	},
+	rules: {
+		// TODO: maybe fix the above warnings
+		eqeqeq: 'warn',
+		curly: 'warn',
+		'no-console': 'warn',
+		'no-empty': 'warn',
+		'no-unused-vars': 'warn',
+		'es5/no-es6-methods': 0, // TODO: maybe disable it on line/file basis
+		'no-useless-escape': 0,
+		'no-control-regex': 0,
+		'no-unused-expressions': 'warn',
+
+		'es5/no-block-scoping': [ 'error' ],
+		'no-caller': 'error',
+		'no-cond-assign': [ 'error', 'except-parens' ],
+		'no-eq-null': 'error',
+		'no-irregular-whitespace': 'error',
+		'no-trailing-spaces': 'error',
+		'no-undef': 'error',
+		// 'one-var': [ 'error', 'always' ],
+		quotes: [ 'warn', 'single', { avoidEscape: true } ],
+		'wrap-iife': [ 'error', 'any' ],
+	},
+};