Compile Coffescript files one by one

[chopachom]

Hi guys!
I'm using ver 0.7.1 and trying to compile coffeescript files into js files and I have the following bundle configuration:

coffee_bundle = Bundle('coffee/*.coffee',
    filters='coffeescript'
)

jslibs_bundle = Bundle("js/lib/*.js")

jsall_bundle = Bundle(coffee_bundle,jslibs_bundle, 
    filters="coffeescript,jsmin", output="js/app.js"
)

in my template:

{% assets "jsall_bundle" %}
    <script type="text/javascript" src="{{ ASSET_URL }}"></script>
{% endassets %}

In debug mode this produces

<script type="text/javascript" src="/static/coffee/test.coffee"></script><!-- DO NOT WANT .coffee (actually expected test.js)-->
<script type="text/javascript" src="/static/js/lib/bootstrap.js"></script>    
<script type="text/javascript" src="/static/js/lib/handlebars-1.0.rc.1.js"></script>    
<script type="text/javascript" src="/static/js/lib/jquery-1.8.2.js"></script>

As you can see coffescript files aren't compiled, so, I thought maybe I should specify debug=False to the coffee_bundle, but this results in the following error:

BuildError: No output target found for <Bundle output=None, filters=[<webassets.filter.coffeescript.CoffeeScriptFilter object at 0x1019414d0>], contents=('coffee/*.coffee',)>

Ok, lets add output :

coffee_bundle = Bundle('coffee/*.coffee',debug=False,
    filters='coffeescript', output="js/coffee.js"
)

Ok, coffescript files are compiling now, but they are merged into one file, which is not a desirable result because it's hard to debug

<script type="text/javascript" src="/static/js/coffee.js?4913d094"></script>    
<script type="text/javascript" src="/static/js/lib/bootstrap.js"></script>    
<script type="text/javascript" src="/static/js/lib/handlebars-1.0.rc.1.js"></script>    
<script type="text/javascript" src="/static/js/lib/jquery-1.8.2.js"></script>

So the question is how can I compile .coffee files one by one in debug mode and merge them with other js files in production mode? Is it possible?

[miracle2k]

I've been considering a debug='spew' mode that would do exactly that (#168).

At this point, to accomplish this, you'd have to manually build a bundle structure where each coffee file is in it's own bundle, with it's own output target (env.resolver in the git version might be some help there resolving globs etc).

[chopachom]

Wouldn't it make sense to allow a directory in the output parameter i.e. if we specify a directory output="somedir/" then files wouldn't be merged, but filtered and processed one by one and copied into somedir?

[miracle2k]

I've considered things along those lines in the past, but the problem is that you then don't have a valid output target for production mode.

Making it a debug="something" option is a very good fit in this case, because it's effectively incompatible with "debug=merge" anyway, and it also means that with Environment.debug == False, that debug mode will automatically be ignored.

The problem of where to store / how to name the files in spew remains. We'd probably have to generate some filename based on the bundle output. Though because the webassets API is so explicit in other respects, I always feel bad when doing this.

At some point, I'd like to get to place where an integration library like django-assets could serve compiled Coffeescript files dynamically via a view.

[miracle2k]

I'm closing this in favor of #168, where this problem can be discussed further.