Conditional require

[coder2000]

I am working on a rails plugin and it has support for different javascript frameworks. With the new asset pipeline however, I can't select the correct file to use. I would like to be able to determine the framework available and load appropriate javascript.

[josh]

You can use .erb to do conditionals.

[coder2000]

@josh I have tried that however it seems that it isn't parsed because it ends up three lines down the file.

[vhochstein]

Similar issue here. js.erb are not filtered by erb...
//= require <%=ActiveScaffold.js_framework.to_s%>/my_test

[josh]

<% require_asset "#{ActiveScaffold.js_framework}/my_test" %>

[vhochstein]

If I write the following in my gem manifest file with erb extension:

<% if ActiveScaffold.js_framework == :jquery %>
//= require jquery/active_scaffold
<% else %>
//= require prototype/active_scaffold
<% end %>

erb is evaluated, but unfortuently the code in my manifest file is concatenated to one javascript file, but require statement is nt processed...

[coder2000]

Thank You. Using require_asset worked. I didn't know you could call it directly or that it existed.

[awendt]

Thanks @josh for the hint to require_asset

[andyjeffries]

This seems like a very logical thing to want to do. Is there any explanation of why it works this way round (and you need the require_asset workaround) or plans to "fix" it in a future version?

[MiguelMadero]

Seems like require statements are processed before the erb processor, that's why it doesn't have any effect. Strangely the require statement is still removed from the file instead of being left as a comment. require_asset did the trick for me.

Thanks

[alex88]

Also anything after the erb's require_asset doesn't get parsed, so I think that should be an issue

[coli]

require_asset is being added to the end of the list, instead of in the order of this file.

eg:

 = require angular
<% require_asset "angular-mocks" if Rails.env.development? %>
 = require common

and the order ended up being:

angular, common, angular-mocks

[tamvm]

@coli 's right, any solution to add file conditionally in application.js?

[meowsus]

@coli @tam-vo Did you ever find a solution to this? No matter where I place my ERB conditional it's always added at the end of my file.

[pjar]

Having the same issue as @alex88 - everything after an erb tags is ignored and just plain text in the compiled .js file. Any solutions for that?