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

grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    less: {
        options: {
            paths: 'less',
            yuicompress: true
        },
        files: {
            'styles.css': 'less/button.less'
        }
    },

    watch: {
        less: {
            files: 'less/*.less',
            tasks: 'less'
        }
    }
});