flatinator

Flattens the build output of component-build to remove calls to require.alias and other junk

npm install flatinator
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Flatinator

Introducing The Flatinator

Component is a great package manager for client side modules. It's also got a pretty nifty community, too.

Sadly the build tool has a few quirks and issues but the most troubling is the size of the build files. One very large project I'm working on has over 50 components (a combination of local and remote). This, it turns out, generates 190kb of calls to require.alias() and because most of those calls are very long strings this bulk remains in the minified version.

Flatinator: Not a blunt instrument

Flatinator can feel like blunt instrument. It removes:

  • local require: all modules become globally available to all other modules
  • require.alias calls: all modules are renamed to what they're called with. 'green-mesa-hyperbone-model/index.js' becomes 'hyperbone-model'
  • support for namespacing. All the above means modules have to have a unique name. You can't require('event') in module a and require('event') in module b and have those requires point to different Components. Sorry.

But really, under that menacing vicious exterior it works at the AST level to delicately manipulate and understand your build. In effect all require resolves are done at Flatinator time, not run time. If the build.js is compatible, hurray! You can flatinate it and enjoy simpler, smaller builds.

Flatinator: It Does Post-Processing

Flatinator is a post-processing step for Component build. It takes the output of Component and gets rid of as much junk as it can by working at the AST level for maximum safety.

Flatinator: IT MAY MAKE YOUR STUFF WORK!

One advantage of Flatinator is that by default you can access any module from anywhere - including from inline script tags. <script>var $ = require('jquery')</script> actually works. This is because after Flatinator has finished with your build, the jQuery module is called jquery instead of components-jquery/jquery.js, which means less 'omg I can't find that module!!' errors being thrown.

Of course if you use the --app option then your build gets wrapped in an anonymous function, stopping variables leaking into the global scope. A quick window.require = require inside a module will sort that out.

Flatinator: The Helpful Destroyer

As Flatinator purges the dreck from your build file, it tells you what it's doing and what it's done. It lets you know if it can't find a module for a particular call to require. It lets you know if a couple of modules are clashing. It tells you what unique name it's given each module. This should just be what you require() the module with.

Flatinator Loves Applications

Component as a build tool is really about making a bunch of modules available to a web page. Lots of little chunks of functionality. That sort of thing. Flatinator feels that this is very cool but sometimes you just want to build a single screen app, you want to use Components and you want your build to be a self bootstrappin', global scope avoidin' bundle of awesomeness.

Installing The Flatinator

Flatinator is installed through the magic of npm

$ npm install -g flatinator

Wielding The Flatinator

Default Enflattening.

Process build/build.js to build/rebuild.js. END!

$ component install && component build
$ flatinator

Enflatten something in a strange location

The -i or --input option lets you specify an input build file. This example processes crazy-build-lcoation/ermahgod.js and dumps the output in build/rebuild.js.

$ flatinator -i crazy-build-location/ermahgod.js

Put the Enflattened file in a strange location

The -o option lets you specify an output location. This example processes build/build.js and dumps the output in public/js/rebuild.js.

$ flatinator -o public/js

Name The Enflattened

The -n option lets you specify a filename for your output file. You can set this to -n build if you just want it to overwrite the original file Component-build generated.

In this example, build/build.js is processed and the output goes to build/love-flatinator.js

$ flatinator -n love-flatinator

Bootstrap The Enflattened

The --app option does two things:

  • Wraps the output in a self executing anonymous function. You have to do window.require = require in some module if you want to be able to access modules from inline script tags.
  • Appends a call to a module of your choice. No need for an inline script tag to bootstrap your app.
$ flatinator -n love-flatinator --app love-flatinator

This would generate...

(function(){
  // tiny require goes here..
  // the modules go here...
  require('love-flatinator')
}())

Questions. Comments.

Flatinator has no time for your questions or comments.

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