Gulp build script to build sass and upload to an ftp server. has a watch task.

gulpfile.js

// Web build script. Builds sass and uploads to an ftp server.
// Place source to be uploaded in a folder next to the script called src.
// Sass file is src/sass/style.scss and will become src/css/style.css
// will upload all files to the specified root
// Configuration for script
var config = {
    host: 'example.com',
    user: 'user',
    password: 'fish123',
    root: '/public_html'
}

var gulp = require( 'gulp' );
var gutil = require( 'gulp-util' );
var ftp = require( 'vinyl-ftp' ),
sass = require('gulp-sass'),
sourcemaps = require('gulp-sourcemaps'),
autoprefixer = require('gulp-autoprefixer');
var globs = [
    'src/**',
];

gulp.task( 'deploy', ['build-css'], function () {

    var conn = ftp.create( {
        host:     config.host,
        user:     config.user,
        password: config.password,
        parallel: 8,
        log:      gutil.log
    } );


    return gulp.src( globs, { base: 'src/.', buffer: false } )
        .pipe( conn.newer( config.root ) ) // only upload newer files
        .pipe( conn.dest( config.root ) );

} );
gulp.task('build-css', function() {
    return gulp.src('src/sass/style.scss')
        .pipe(sass( { outputStyle: 'compressed' } ).on('error', sass.logError))
		.pipe(autoprefixer({
			browsers: ['last 2 versions'],
			cascade: false
		}))
        .pipe(gulp.dest('src/css'));
});
gulp.task('watch', ['build-css', 'deploy'], function() {
  gulp.watch(globs, ['build-css', 'deploy']);
})

Your code is great but does not rerun after a new save, I do not understand why it works only once
thanks