Issue 3692 - Add base ESLint configuration

eslint-config-eyeo/index.js

Index: eslint-config-eyeo/index.js
diff --git a/eslint-config-eyeo/index.js b/eslint-config-eyeo/index.js
new file mode 100644
index 0000000000000000000000000000000000000000..a96830766f9b70f2ba8638b682cffade87a74815
--- /dev/null
+++ b/eslint-config-eyeo/index.js
@@ -0,0 +1,114 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2017 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* eslint-env commonjs */
+
+"use strict";
+
+module.exports = {
+  extends: "eslint:recommended",
+  env: {
+    es6: true
+  },
+  rules: {
+    "array-bracket-spacing": "error",
+    "arrow-spacing": "error",
+    "block-scoped-var": "error",
+    "block-spacing": "error",
+    "brace-style": ["error", "allman", {allowSingleLine: true}],
+    "camelcase": ["error", {properties: "never"}],
+    "comma-dangle": "error",
+    "comma-spacing": "error",
+    "comma-style": "error",
+    "computed-property-spacing": "error",
+    "curly": ["error", "multi-or-nest"],
+    "eol-last": "error",
+    "func-call-spacing": "error",
+    "indent": ["error", 2, {SwitchCase: 1, ArrayExpression: "first"}],
+    "key-spacing": "error",
+    "keyword-spacing": "error",
+    "linebreak-style": "error",
+    "lines-around-directive": "error",
+    "max-len": ["error", 80, {ignoreUrls: true}],
+    "new-parens": "error",
+    "no-array-constructor": "error",
+    "no-caller": "error",
+    "no-case-declarations": "off",
+    "no-catch-shadow": "error",
+    "no-cond-assign": "off",
+    "no-console": ["error", {allow: ["warn", "error", "trace"]}],
+    "no-control-regex": "off",
+    "no-else-return": "error",
+    "no-empty": ["error", {allowEmptyCatch: true}],
+    "no-eval": "error",
+    "no-extra-bind": "error",
+    "no-extra-label": "error",
+    "no-implied-eval": "error",
+    "no-labels": ["error", {allowLoop: true}],
+    "no-lone-blocks": "error",
+    "no-lonely-if": "error",
+    "no-multi-spaces": "error",
+    "no-new-func": "error",
+    "no-new-object": "error",
+    "no-proto": "error",
+    "no-self-compare": "error",
+    "no-shadow": "error",
+    "no-trailing-spaces": "error",
+    "no-unneeded-ternary": "error",
+    "no-unused-vars": "off",
+    "no-useless-computed-key": "error",
+    "no-useless-concat": "error",
+    "no-useless-escape": "error",
+    "no-useless-return": "error",
+    "no-var": "error",
+    "no-warning-comments": "error",
+    "no-whitespace-before-property": "error",
+    "no-with": "error",
+    "object-curly-spacing": "error",
+    "object-shorthand": ["error", "always", {
+      avoidExplicitReturnArrows: true
+    }],
+    "one-var": ["error", "never"],
+    "operator-assignment": "error",
+    "operator-linebreak": "error",
+    "padded-blocks": ["error", "never"],
+    "prefer-arrow-callback": "error",
+    "prefer-destructuring": ["error", {array: false}],
+    "prefer-numeric-literals": "error",
+    "prefer-rest-params": "error",
+    "prefer-spread": "error",
+    "quote-props": ["error", "consistent-as-needed"],
+    "quotes": ["error", "double", {avoidEscape: true}],
+    "radix": "error",
+    "rest-spread-spacing": "error",
+    "semi": "error",
+    "semi-spacing": "error",
+    "space-before-function-paren": ["error", "never"],
+    "space-in-parens": "error",
+    "space-infix-ops": "error",
+    "space-unary-ops": "error",
+    "spaced-comment": "error",
+    "strict": ["error", "global"],
+    "valid-jsdoc": ["error", {
+      requireParamDescription: false,
+      requireReturn: false,
+      requireReturnDescription: false
+    }],
+    "yield-star-spacing": "error",
+    "yoda": "error"
+  }
+};