gruntfile.js

module.exports = function(grunt) {
    // Project configuration.
    grunt.initConfig({
        copy: {
            libs: {
                files: [
                    { expand: true, cwd: 'libs/', src: ['**/*.*'], dest: 'dist/libs/' }
                ]
            },
            fonts: {
                files: [
                    { expand: true, cwd: 'src/themes/proton/fonts', src: ['**/*.*'], dest: 'dist/themes/proton/fonts' }
                ]
            }
        },
        less: {
            production: {
                options: {
                    cleancss: true,
                    compress: true
                },
                files: {
                    'dist/themes/default/style.min.css': 'src/themes/default/style.less',
                    'dist/themes/proton/style.min.css': 'src/themes/proton/style.less'
                }
            },
            development: {
                files: {
                    'src/themes/default/style.css': 'src/themes/default/style.less',
                    'dist/themes/default/style.css': 'src/themes/default/style.less',
                    'src/themes/proton/style.css': 'src/themes/proton/style.less',
                    'dist/themes/proton/style.css': 'src/themes/proton/style.less'
                }
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-copy');
    grunt.loadNpmTasks('grunt-contrib-less');

    // Default task, generate theme sprite images and CSS
    grunt.registerTask('default', ['copy:libs', 'copy:fonts', 'less']);
};