Basic gulp file to get project up and running

gulpfile.js

var gulp = require('gulp'),
    minifycss = require('gulp-minify-css'),
    autoprefixer = require('gulp-autoprefixer'),
    notify = require('gulp-notify'),
    sass = require('gulp-ruby-sass'),
    rename = require('gulp-rename');

gulp.task('css', function() {
    return gulp.src('public/assets/sass/application.scss')
        .pipe(sass({ style: 'expanded' }))
        .pipe(autoprefixer())
        .pipe(gulp.dest('public/css'))
        .pipe(rename({suffix: '.min'}))
        .pipe(minifycss())
        .pipe(gulp.dest('public/css'))
        .pipe(notify({ message: 'CSS compiled successfully!' }));
});

gulp.task('default', function() {
    gulp.run('css');

    gulp.watch('public/assets/sass/**/*.scss', function() {
        gulp.run('css');
    });
});