zwily/aws-keychain-util — pull request #1 by ccutrer (2013-04-17 19:21:39+00:00)
Title: add a CredentialProvider compatible with aws-sdk gem

so that people can hook directly in, without need to create a
subshell

also allows using the default keychain - some people keep their login
keychain secure enough and may not want to manage multiple keychains