The following commits build on work from @vtolstov to create a
post processor shell-local plugin. Please see his original work
over at https://github.com/vtolstov/packer-post-processor-shell
I have modified it slightly to output information onto the packer
ui as shown in the below screenshot which executes a script that
runs env.
This plugin enables users to submit environmental variables to
external external shell script(s) to do some post processing
e.g. (Upload to somewhere, convert to different format, and so
on)
Most of the work is a merge from the provisioner shell and
shell-local scripts.

Signed-off-by: Ian Duffy <[email protected]>
This commit adds support for a post-processor that produces a compressed
archive that can be uploaded to an OpenStack cluster through either
the Horizon web interface or Glance.
The null builder is not really a bulider, it just setups a SSH
connection and runs the provisioners. It can be used to debug
provisioners without incurring high wait times. It does not create any
kind of image or artifact.