Chapters

18 Chapters | 1:11:28 |

01

Your First Gulp

4:31
02

Sass to CSS

4:46
03

Sourcemaps

2:46
04

Watch for Changes

3:57
05

Combining (concat) Files

2:57
06

Minify

1:29
07

Minify only in Production

3:04
08

Sourcemaps only in Development

2:04
09

gulp-load-plugins

2:11
10

Errors: Call the Plumber

1:47
11

Page Specific CSS

4:27
12

Bower Components out of web

3:47
13

Minify and Combine JavaScript

6:17
14

Publish Fonts to web

4:10
15

Versioning to Bust Cache

9:10
16

JavaScript Versioning and Cleanup

4:15
17

on('end'): Async and Listeners

6:05
18

Task Order

3:45

This tutorial has a new version, check it out!

> Gulp! Refreshment for Your Frontend Assets

Buy Access to Course

10.

Errors: Call the Plumber

Autoplay

Keep on Learning!

If you liked what you've learned so far, dive in! Subscribe to get
access to this tutorial plus video, code and script downloads.

Start your All-Access Pass

Buy just this tutorial for $6.00

Previous Chapter

Next Chapter

With gulp running, when we update a file, the gulp-bots recompile stuff for us. We're like a factory for CSS.

But there's a problem, a big problem if you're like me and mess up a lot. Add a syntax error in layout.scss.

Now check out gulp. It exploded! It's not even running anymore. So even if I fix the error, gulp is dead. I'll probably refresh my browser for 30 minutes before I realize that gulp hasn't been running this entire time. And I'll spend the next 5 minutes composing an angry tweet.

Out of the box, Gulp supports error handlers where you say "Hey, instead of exploding all crazy, just call this function over here." But instead, I'll show you a really nice plugin called gulp-plumber that'll take care of this for us.

Go look for gulp-plumber. Copy its handy install statement, and paste that to get it downloading.

npm install --save-dev gulp-plumber

Now, usually, this is where we'd go copy the require statement. But since we added gulp-load-plugins, we can skip that!

Instead, let's get to work. We need to pipe gulp through this plugin before any logic that might cause an error. So right after gulp.src, say pipe(plugins.plumber()):

            Copy Code

                            Show All Lines

                        30 lines
            |
            gulpfile.js
        
                Show Lines

                                                    // ... lines 1 - 11
                            
                gulp.src(config.assetsDir+'/'+config.sassPattern)
        
                    .pipe(plugins.plumber(function(error) {
        
                        console.log(error.toString());
        
                        this.emit('end');
        
                    }))
        
                Show Lines

                                                    // ... lines 17 - 18
                            
                    .pipe(plugins.concat('main.css'))
        
                Show Lines

                                                    // ... lines 20 - 30

Tip

The function(error) callback function was not shown in the video, but should be included. This prevents an issue when running gulp watch.

And yea, that's it. Go back and get gulp back and running:

gulp

Let's mess up layout.scss again! This time, gulp does show us the error, it just doesn't die anymore. How nice! When we fix the error, it recompiles. Robots, get back to work!

Tip

Plumber prevents gulp from throwing a proper error exit code. When building for production, you may want a proper error. If so, try using plumber() only in development:

.pipe(gulpif(!util.env.production, plumber(function(error) {
    console.log(error.toString());
    this.emit('end');
})))

Thanks to Nicolas Sauveur for the tip!

7 Comments

Sort By

Richard 6 years ago

This was one of those real "wow" days. How wonderful is gulp?

| Reply |

Victor SFCASTS Richard 6 years ago edited

Hey Richard ,

Haha, we're going to release one more wonderful screencast: Webpack, which is even more wonderful for us, because we've switched from Gulp to Webpack on KnpU about six months ago ;)

Stay tuned!

Cheers!

| Reply |

Marouane Rassili 6 years ago

Hi, I'm using @import and partials. When I make a syntax error in one of the partials it doesn't throw an error!! It only throws an error when it detects a syntax error in the main scss file... That's so bad, please help

| Reply |

Victor SFCASTS Marouane Rassili 6 years ago

Hey Marouane,

Try to add "use strict" at the top of the JS file, does it help you? See https://www.w3schools.com/j... for more information.

Cheers!

| Reply |

Nicolas-S 6 years ago

Hello Ryan,

Just ran into an issue. Plumber seems to prevent gulp to throw the correct exit code when the script fails. It is problematic when you build assets for production in a deployment workflow, and gulp fails silently.

So I now use : .pipe(gulpif(!util.env.production, plumber()))

| Reply |

enkuso Nicolas-S 6 years ago

When using plugins, it should be:

.pipe(plugins.if(!config.production, plumber()))

| Reply |

weaverryan SFCASTS Nicolas-S 6 years ago

Hey Nicolas!

I like it a lot - very good point. I've added a note at the bottom of this chapter - thanks for sharing!

Cheers!

| Reply |

Symfony 2

What PHP libraries does this tutorial use?

// composer.json
{
    "require": {
        "php": ">=5.3.3",
        "symfony/symfony": "2.6.*", // v2.6.4
        "doctrine/orm": "~2.2,>=2.2.3", // v2.4.6
        "doctrine/doctrine-bundle": "~1.2", // v1.2.0
        "twig/extensions": "~1.0", // v1.2.0
        "symfony/assetic-bundle": "~2.3", // v2.5.0
        "symfony/swiftmailer-bundle": "~2.3", // v2.3.7
        "symfony/monolog-bundle": "~2.4", // v2.6.1
        "sensio/distribution-bundle": "~3.0", // v3.0.9
        "sensio/framework-extra-bundle": "~3.0", // v3.0.3
        "incenteev/composer-parameter-handler": "~2.0", // v2.1.0
        "hautelook/alice-bundle": "~0.2" // 0.2
    },
    "require-dev": {
        "sensio/generator-bundle": "~2.3" // v2.4.0
    }
}

Previous Chapter

Next Chapter

Errors: Call the Plumber

Share this awesome video!

Keep on Learning!

7 Comments

Delete comment?

What PHP libraries does this tutorial use?

Show Lines	// ... lines 1 - 11
	gulp.src(config.assetsDir+'/'+config.sassPattern)
	.pipe(plugins.plumber(function(error) {
	console.log(error.toString());
	this.emit('end');
	}))
Show Lines	// ... lines 17 - 18
	.pipe(plugins.concat('main.css'))
Show Lines	// ... lines 20 - 30