mitchellh/packer — pull request #1585 by Tpbrown (2014-10-13 22:32:14+00:00)
Title: Colorize Ansible output, and don't buffer output.

Setting environment variables for the ansible-playbook invocation.

ANSIBLE_FORCE_COLOR will ensure output is colorized. PYTHONUNBUFFERED will stream output as Ansible runs, vs getting a big dump of output at the end.