Rather than downloading the dependencies as files I'd like to have the ability to output a list of URLs written to a file. I can then send this file to an external system to download directly from the repo.

Specific use case:

In particular I can then use this file to create scripts for installing software onto AWS instances - pulling directly from the repository on the instance itself rather than pushing the files to the instance. This is necessary if I want to use AWS scalability groups.

I'll write my own extension, and post a patch as an attachment once I'm done.