Basic watch › sass

Gruntfile.js

module.exports = function(grunt)
{
    grunt.initConfig(
    {
        pkg: grunt.file.readJSON('package.json'),
        
        watch: {
            css: {
                files: [
                    'www/assets/css/sass/*.scss',
                    'www/assets/css/sass/*/*.scss',
                    'www/assets/css/sass/*/*/*.scss',
                    'www/assets/css/sass/*/*/*/*.scss',
                    'www/assets/css/sass/*/*/*/*/*.scss'
                ],
                tasks: ['sass']
            }
        },

        sass: {
            dist: {
                files: {
                    'www/assets/css/admin-interface.css': 'www/assets/css/sass/admin-interface.scss'
                }
            }
        }
    });

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

    grunt.registerTask('default', ['watch']);
};