hashicorp/terraform — pull request #361 by mitchellh (2014-10-05 01:10:05+00:00)
Title: Foundational support for UI output from provisioners

This PR lays the core code necessary for provisioners to output to the UI. It does two things:

* Add a new `UIOutput` interface
* Modify the `ResourceProvisioner` to add the UIOutput

This doesn't modify any provisioners yet to add the output.