Previously, when you built from an existing image, you were unable
to reconfigure block device mappings, as it just took them and
copied them over. This allows users to specify new, custom
block device mappings, even when building from an existing
image.
There is some logic around how EBS mappings are handled / generated depending
on whether an image if from scratch or not. There was no testing around
this behaviour before. This strips that logic out into a separate function,
to enable testing it independentlhy.
This commit moves the Amazon builders of Packer away from the Hashicorp
fork of the goamz library to the official AWS SDK for Go, in order that
third party plugins may depend on the more complete official library
more easily.
Adrien Delorme
Megan Marsh
Sargun Dhillon
Chris Bednarski
Seth Vargo
James Nugent
Mitchell Hashimoto
Peter Sankauskas