Gruntfile.js

 /*
 * sublimetext-gruntfile.js
 * https://github.com/idleberg/sublimetext-gruntfile.js
 *
 * Copyright (c) 2014 Jan T. Sott
 * Licensed under the MIT license.
 */
 
 module.exports = function(grunt) {

    var jsonFiles = [
        '**/*.JSON-tmLanguage',
        '**/*.sublime-build',
        '**/*.sublime-commands',
        '**/*.sublime-completions',
        '**/*.sublime-keymap',
        '**/*.sublime-macro',
        '**/*.sublime-menu',
        '**/*.sublime-settings',
        '**/*.sublime-theme',
        'messages.json'
    ];

    var pyFiles = [
        '*.py'
    ];

    var xmlFiles = [
        '**/*.plist',
        '**/*.sublime-snippet',
        '**/*.tmCommand',
        '**/*.tmLanguage',
        '**/*.tmPreferences',
        '**/*.tmSnippet',
        '**/*.tmTheme'
    ];

    grunt.initConfig({

        // default task
        jsonlint: {
          files: {
            src: jsonFiles
          }
        },

        xml_validator: {
            files: {
                src: xmlFiles
            },
        },

        // watch task
        watch: {
            json: {
                files: jsonFiles,
                tasks: ['jsonlint']
            },
            xml: {
                files: xmlFiles,
                tasks: ['xml_validator']
            }
        },

        // pylint task, not yet part of default
        pylint: {
          files: {
            options: {
                errorsOnly: true
            },
            src: pyFiles
          }
        },

    });

    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-jsonlint');
    grunt.loadNpmTasks('grunt-pylint');
    grunt.loadNpmTasks('grunt-xml-validator');
    grunt.registerTask('default', ['jsonlint', 'xml_validator']);

    // task shortcuts
    grunt.registerTask('json', 'jsonlint');
    grunt.registerTask('py', 'pylint');
    grunt.registerTask('xml', 'xml_validator');
 };