mitchellh/packer — pull request #171 by markpeek (2013-07-11 20:36:17+00:00)
Title: Move AWS auth decisions to goamz [GH-160]

Currently the passed in AWS auth or AWS environment variables are
interpreted by packer. This change moves that logic into goamz in
order to support both the existing and instance based IAM role
authentication. This requires a corresponding change to goamz.