While I was working on the Ansible appliance, I came across an issue I couldn't figure out how to address.

The Problem: The appliance build process leverages the Python package manager, pip, to install the latest stable versiion of Ansible.  Ansible uses a rapid development/release cycle which means every time the build is run, the version of Ansible changes.  I have to remember to update the README.rst file every time the version changes.  I could not figure out a way to have the build process update the README.rst automatically.

That got me thinking that if there was a way to pass appliance version in a standard way, the README.rst could be updated by variable substitution.  Since app version informaton is not included in the turnkey-version string, a new command would be needed.

# turnkey-version
turnkey-ansible-13.1-rc1-wheezy-amd64
# turnkey-app-version
ansible-1.6.10

or

# turnkey-version
turnkey-drupal7-13.1-wheezy-amd64
# turnkey-app-version
drupal-7.30

TKLdev could then return the information as a variable which could be used in the README.md or README.rst.