chore: change eslint-rules for tasks/

- use es2017 rules as NodeJS supports it today
- add "prefer-const"

tasks/.eslintrc

@@ -1,16 +0,0 @@
-{
-  "globals": {
-    "require": true
-  },
-  "rules": {
-    // Disabling for tests, for now.
-    "no-path-concat": 0,
-
-    "no-var": 0,
-    "no-shadow": 0,
-    "handle-callback-err": 0,
-    "no-console": 0,
-    "no-process-env": 0,
-    "dot-notation": [2, {"allowKeywords": true}]
-  }
-}

tasks/.eslintrc.js

@@ -0,0 +1,12 @@
+module.exports = {
+  extends: ['../.eslintrc.js'],
+  parserOptions: {
+    sourceType: 'module',
+    ecmaVersion: 2017,
+    ecmaFeatures: {}
+  },
+  rules: {
+    'no-process-env': 'off',
+    'prefer-const': 'warn'
+  }
+};

tasks/metrics.js

@@ -1,10 +1,10 @@
-var _ = require('underscore'),
+const _ = require('underscore'),
   async = require('neo-async'),
   metrics = require('../bench');
 
 module.exports = function(grunt) {
   grunt.registerTask('metrics', function() {
-    var done = this.async(),
+    const done = this.async(),
       execName = grunt.option('name'),
       events = {};
 

tasks/parser.js

@@ -1,16 +1,16 @@
-var childProcess = require('child_process');
+const childProcess = require('child_process');
 
 module.exports = function(grunt) {
   grunt.registerTask('parser', 'Generate jison parser.', function() {
-    var done = this.async();
+    const done = this.async();
 
-    var cmd = './node_modules/.bin/jison';
+    let cmd = './node_modules/.bin/jison';
 
     if (process.platform === 'win32') {
       cmd = 'node_modules\\.bin\\jison.cmd';
     }
 
-    var child = childProcess.spawn(
+    const child = childProcess.spawn(
       cmd,
       ['-m', 'js', 'src/handlebars.yy', 'src/handlebars.l'],
       { stdio: 'inherit' }
@@ -22,14 +22,14 @@ module.exports = function(grunt) {
         return;
       }
 
-      var src = [
+      const src = [
         'src/parser-prefix.js',
         'handlebars.js',
         'src/parser-suffix.js'
       ]
         .map(grunt.file.read)
         .join('');
-      grunt.file.delete('handlebars.js');
+      grunt.file['delete']('handlebars.js');
 
       grunt.file.write('lib/handlebars/compiler/parser.js', src);
       grunt.log.writeln('Parser "lib/handlebars/compiler/parser.js" created.');

tasks/publish.js

@@ -1,4 +1,4 @@
-var _ = require('underscore'),
+const _ = require('underscore'),
   async = require('neo-async'),
   AWS = require('aws-sdk'),
   git = require('./util/git'),
@@ -6,7 +6,7 @@ var _ = require('underscore'),
 
 module.exports = function(grunt) {
   grunt.registerTask('publish:latest', function() {
-    var done = this.async();
+    const done = this.async();
 
     git.debug(function(remotes, branches) {
       grunt.log.writeln('remotes: ' + remotes);
@@ -15,7 +15,7 @@ module.exports = function(grunt) {
       git.commitInfo(function(err, info) {
         grunt.log.writeln('tag: ' + info.tagName);
 
-        var files = [];
+        const files = [];
 
         // Publish the master as "latest" and with the commit-id
         if (info.isMaster) {
@@ -40,7 +40,7 @@ module.exports = function(grunt) {
     });
   });
   grunt.registerTask('publish:version', function() {
-    var done = this.async();
+    const done = this.async();
     initSDK();
 
     git.commitInfo(function(err, info) {
@@ -52,7 +52,7 @@ module.exports = function(grunt) {
   });
 
   function initSDK() {
-    var bucket = process.env.S3_BUCKET_NAME,
+    const bucket = process.env.S3_BUCKET_NAME,
       key = process.env.S3_ACCESS_KEY_ID,
       secret = process.env.S3_SECRET_ACCESS_KEY;
 
@@ -63,13 +63,13 @@ module.exports = function(grunt) {
     AWS.config.update({ accessKeyId: key, secretAccessKey: secret });
   }
   function publish(files, callback) {
-    var s3 = new AWS.S3(),
+    const s3 = new AWS.S3(),
       bucket = process.env.S3_BUCKET_NAME;
 
     async.each(
       _.keys(files),
       function(file, callback) {
-        var params = {
+        const params = {
           Bucket: bucket,
           Key: file,
           Body: grunt.file.read(files[file])
@@ -87,7 +87,7 @@ module.exports = function(grunt) {
     );
   }
   function fileMap(suffixes) {
-    var map = {};
+    const map = {};
     _.each(
       [
         'handlebars.js',

tasks/test.js

@@ -1,13 +1,13 @@
-var childProcess = require('child_process'),
+const childProcess = require('child_process'),
   fs = require('fs'),
   os = require('os');
 
 module.exports = function(grunt) {
   grunt.registerTask('test:bin', function() {
-    var done = this.async();
+    const done = this.async();
 
-    var cmd = './bin/handlebars';
+    let cmd = './bin/handlebars';
-    var args = ['-a', 'spec/artifacts/empty.handlebars'];
+    const args = ['-a', 'spec/artifacts/empty.handlebars'];
 
     // On Windows, the executable handlebars.js file cannot be run directly
     if (os.platform() === 'win32') {
@@ -19,7 +19,7 @@ module.exports = function(grunt) {
         throw err;
       }
 
-      var expected = fs
+      const expected = fs
         .readFileSync('./spec/expected/empty.amd.js')
         .toString()
         .replace(/\r\n/g, '\n');
@@ -38,9 +38,9 @@ module.exports = function(grunt) {
     });
   });
   grunt.registerTask('test:mocha', function() {
-    var done = this.async();
+    const done = this.async();
 
-    var runner = childProcess.fork('./spec/env/runner', [], {
+    const runner = childProcess.fork('./spec/env/runner', [], {
       stdio: 'inherit'
     });
     runner.on('close', function(code) {
@@ -51,24 +51,24 @@ module.exports = function(grunt) {
     });
   });
   grunt.registerTask('test:cov', function() {
-    var done = this.async();
+    const done = this.async();
 
-    var runner = childProcess.fork(
+    const runner = childProcess.spawn(
       'node_modules/istanbul/lib/cli.js',
       ['cover', '--source-map', '--', './spec/env/runner.js'],
       { stdio: 'inherit' }
     );
-    runner.on('close', function(code) {
+    runner.on('exit', function(code) {
-      if (code != 0) {
+      if (code !== 0) {
         grunt.fatal(code + ' tests failed');
       }
       done();
     });
   });
   grunt.registerTask('test:min', function() {
-    var done = this.async();
+    const done = this.async();
 
-    var runner = childProcess.fork('./spec/env/runner', ['--min'], {
+    const runner = childProcess.fork('./spec/env/runner', ['--min'], {
       stdio: 'inherit'
     });
     runner.on('close', function(code) {
@@ -80,9 +80,9 @@ module.exports = function(grunt) {
   });
 
   grunt.registerTask('test:check-cov', function() {
-    var done = this.async();
+    const done = this.async();
 
-    var runner = childProcess.fork(
+    const runner = childProcess.fork(
       'node_modules/istanbul/lib/cli.js',
       [
         'check-coverage',

tasks/util/git.js

@@ -1,4 +1,4 @@
-var childProcess = require('child_process');
+const childProcess = require('child_process');
 
 module.exports = {
   debug: function(callback) {
@@ -99,13 +99,13 @@ module.exports = {
         throw new Error('git.tagName: ' + err.message);
       }
 
-      var tags = stdout.trim().split(/\n/);
+      let tags = stdout.trim().split(/\n/);
       tags = tags.filter(function(info) {
         info = info.split('-');
         return info.length == 1;
       });
 
-      var versionTags = tags.filter(function(info) {
+      const versionTags = tags.filter(function(info) {
         return /^v/.test(info[0]);
       });
 

tasks/version.js

@@ -1,4 +1,4 @@
-var async = require('neo-async'),
+const async = require('neo-async'),
   git = require('./util/git'),
   semver = require('semver');
 
@@ -7,7 +7,7 @@ module.exports = function(grunt) {
     'version',
     'Updates the current release version',
     function() {
-      var done = this.async(),
+      const done = this.async(),
         pkg = grunt.config('pkg'),
         version = grunt.option('ver');
 
@@ -61,7 +61,7 @@ module.exports = function(grunt) {
   );
 
   function replace(path, regex, value) {
-    var content = grunt.file.read(path);
+    let content = grunt.file.read(path);
     content = content.replace(regex, value);
     grunt.file.write(path, content);
   }