chore: update eslint configuration

.eslintrc

@@ -1,12 +1,30 @@
 {
-  "extends": "google",
+  "extends": [
+    "eslint:recommended",
+    "google"
+  ],
   "parserOptions": {
     "ecmaVersion": 6
   },
   "env": {
+    "es6": true,
     "node": true
   },
   "rules": {
-    "max-len": [2, 140, 2]
+    "max-len": [2, 140, 2],
+    "no-console": [0],
+    "valid-jsdoc": [2, {
+      "requireReturn": true,
+      "requireParamDescription": true,
+      "requireReturnDescription": true,
+      "prefer": {
+        "return": "return",
+        "arg": "param",
+        "argument": "param"
+      },
+      "preferType": {
+        "object": "object"
+      }
+    }]
   }
 }

scripts/lint/index.js

@@ -25,6 +25,7 @@
 const path = require('path');
 const gulp = require('gulp');
 const eslint = require('gulp-eslint');
+const log = require('../log');
 const config = require('../config');
 
 module.exports = function lint() {
@@ -35,6 +36,12 @@ module.exports = function lint() {
     path.join(config.scripts, '**', '*.js'),
   ];
 
+  log.debug('Linting files: ');
+
+  src.forEach((input) => (
+    log.debug(`  ${input}`)
+  ));
+
   return gulp.src(src)
       .pipe(eslint())
       .pipe(eslint.format())

scripts/log/index.js

@@ -0,0 +1,53 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2018 Mickael Jeanroy
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+'use strict';
+
+const log = require('fancy-log');
+const colors = require('ansi-colors');
+
+/**
+ * Log message to output using `DEBUG` level.
+ *
+ * @param {string} msg Message to log.
+ * @return {void}
+ */
+function debug(msg) {
+  log(colors.grey(msg));
+}
+
+/**
+ * Log message to output using `ERROR` level.
+ *
+ * @param {string} msg Message to log.
+ * @return {void}
+ */
+function error(msg) {
+  log(colors.red(msg));
+}
+
+module.exports = {
+  debug,
+  error,
+};

scripts/release/index.js

@@ -26,7 +26,7 @@ const fs = require('fs');
 const gulp = require('gulp');
 const git = require('gulp-git');
 const bump = require('gulp-bump');
-const log = require('fancy-log');
+const log = require('../log');
 const config = require('../config');
 
 /**

src/license-plugin.js

@@ -321,6 +321,7 @@ module.exports = class LicensePlugin {
    * Log debug message if debug mode is enabled.
    *
    * @param {string} msg Log message.
+   * @return {void}
    */
   debug(msg) {
     if (this._debug) {

test/.eslintrc

@@ -0,0 +1,6 @@
+{
+  "env": {
+    "jasmine": true
+  }
+}
+