Passing variables from s3 buckets to reusable roles

[Jaime Bermudez]

Doesn't seem like this is currently possible with Ansible playbooks, but it would be great if there were an include directive that would pull variables from a YAML file in s3.  We have some reusable roles that some of our app stacks depend on, like a postgres RDS role.  Currently, we're defining a vault file that gets included via 'include_vars' in a top-level playbook and the dependent role is passed variables from there.  One advantage of being able to pull from s3 is that we wouldn't have to modify source code - source code that is vaulted, so the resultant PRs can't be easily verified.  Am I missing some mechanism to define variables from s3 (which I've done inside of playbooks using the s3 module followed by the include_vars module) before including a role?  Is this something that might be addressed in v2?

Thanks!

Jaime