Gruntfile.js

/* jshint node:true */
module.exports = function( grunt ){
    'use strict';

    grunt.initConfig({
        // setting folder templates
        dirs: {
            css: 'assets/css',
            fonts: 'assets/font',
            images: 'assets/images',
            js: 'assets/js'
        },

        // Compile all .less files.
        less: {
            admin: {
                src: 'assets/css/admin/**/*.less',
                dest: 'assets/css/admin.css'
            },
            frontend: {
                src: 'assets/css/frontend/**/*.less',
                dest: 'assets/css/frontend.css'
            }
        },

        // Minify all .css files.
        cssmin: {
            minify: {
                expand: true,
                cwd: '<%= dirs.css %>/',
                src: ['*.css'],
                dest: '<%= dirs.css %>/',
                ext: '.css'
            }
        },

        // Minify .js files.
        uglify: {
            options: {
                preserveComments: 'some'
            },
            frontend: {
                files: [{
                    expand: true,
                    cwd: '<%= dirs.js %>',
                    src: [
                        '*.js',
                        '!*.min.js'
                    ],
                    dest: '<%= dirs.js %>',
                    ext: '.min.js'
                }]
            },
        },

        // Watch changes for assets
        watch: {
            less: {
                files: ['<%= dirs.css %>/*.less'],
                tasks: ['less', 'cssmin'],
            },
            js: {
                files: [
                    '<%= dirs.js %>/*js',
                    '!<%= dirs.js %>/*.min.js',
                ],
                tasks: ['uglify']
            }
        },

        shell: {
            options: {
                stdout: true,
                stderr: true
            },
            generatepot: {
                command: [
                    'makepot'
                ].join( '&&' )
            }
        },

    });

    // Load NPM tasks to be used here
    grunt.loadNpmTasks( 'grunt-shell' );
    grunt.loadNpmTasks( 'grunt-contrib-less' );
    grunt.loadNpmTasks( 'grunt-contrib-cssmin' );
    grunt.loadNpmTasks( 'grunt-contrib-uglify' );
    grunt.loadNpmTasks( 'grunt-contrib-watch' );

    // Register tasks
    grunt.registerTask( 'default', [
        'less',
        'cssmin',
        'uglify'
    ]);

    // Just an alias for pot file generation
    grunt.registerTask( 'pot', [
        'shell:generatepot'
    ]);

    grunt.registerTask( 'dev', [
        'default'
    ]);

};