Re: Comiling CoffeeScript in Production

[Konstantin Haase]

We simply use rake-pipeline, which comes with a middleware that recompiles stuff on request in dev mode.

However, if you have a large project, this can significantly slow down request processing, so we moved to just having `rerun rakep` run in parallel.

Konstantin

On Nov 19, 2012, at 5:07 PM, DAZ <daz...@gmail.com> wrote:

Hi,

I've been using the following route handler to compile coffeescript on the fly:

get '/javascripts/application.js' do

  coffee :application

end

But I'd rather not do this in production and would rather compile it locally into a JavaScript file.

The problem I then have is that the compiled JavaScript file gets used in development, rather than the coffeescript file that I'm editing. This is because a static JS file exists, so it gets served, before my route handler picks it up.

The only way I can think of is to use some sort of conditional logic in the layout like this:

<% = coffee :application if development? %>

 <% if production? %>

  <script src="/javascripts/application.js">

<% end %>

Has anybody got any better ways of doing this? 

cheers,

DAZ

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[DAZ]

Thanks Ben and Konstantin,

I was aware of Sprockets in Rails and have been looking at Rake Pipeline (which looks great).

Konstantine - I wasn't aware that rake-pipeline recompiled on each request (the docs mention needing a rake task to compile). That's awesome for small projects. Not sure what you mean by 'rerun rakep' run in parallel??

cheers,

DAZ

[Konstantin Haase]

It only recompiles if you use the middleware (which you should not in production) and only if a source file changed.

Konstantin

To view this discussion on the web visit https://groups.google.com/d/msg/sinatrarb/-/Tx2kpKR4-K4J.

[DAZ]

Just found this that seems to do the job ...

http://ricostacruz.com/sinatra-assetpack/

DAZ

[Alex Chaffee]

rerun is a program that runs a command, then reruns it if any files change.
http://github.com/alexch/rerun
(yes, I wrote it :-))

It's arguably faster than other solutions since it recompiles when the file changes, not when the request is made. But you know, use whatever works for you.