In Rails 3.1, is it really impossible to avoid including duplicate copies of stylesheets?

I do not understand why this is an issue for your specific question. Variables and mixin declarations should not lead to any selectors or declaration blocks in your generated css file. However, when you use mixins for multiple selectors, the corresponding declarations are included for every such selector.

This is how SASS handles it.

I do not understand why this is an issue for your specific question. Variables and mixin declarations should not lead to any selectors or declaration blocks in your generated css file. However, when you use mixins for multiple selectors, the corresponding declarations are included for every such selector.

This is how SASS handles it. So as long as it's only variables and mixins, it should not matter if they are included multiple times in the manifest file since this does not have an effect on the compiled file. On a site-node, I believe it to be good style that SASS forces you to explicitly declare each file's dependencies.

If, however, you also have selectors and declarations in the base file that you want to inherit from in separate files, then indeed these will be included multiple times even in the compiled file. It would still be interesting to know how to prevent this by configuration. However, if you treat each of your sass files to be one encapsulated set of rules without cross-file inheritance, then you should be able to prevent your issue by convention.

You can get around this by doing this: /* * application.css. Scss *= require_self * ----> Note the missing = require_tree */ @import "global.css. Scss"; // Defines global mixins etc @import "users.css.

Scss"; // Uses mixins defined in _global.css. Scss Then don't import global.css. Scssinside users.css.

Scss or any other dependent files. If you haven't already, check out Ryan Bates screencast on SASS and sprockets in rails 3.1, this is what he does to solve this issue.

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