packer/plugin: use chan struct{} for condition variable behavior
packer/plugin: flush os.Stderr whenever a plugin ends
add tests files to everything to test compilation
builder/amazon/chroot: boilerplate
builder/amazon/chroot: rename to builder-amazon-chroot
builder/amazon/chroot: verify we're on an EC2 instance
builder/amazon/chroot: extract the source AMI info
builder/amazon/chroot: create the volume
builder/amazon/chroot: step to gather instance info
builder/amazon/chroot: delete the EBS volume after we're done
builder/amazon/common: generic wait for state to wait for any state
builder/amazon/chroot: wait for volume to beecome ready
builder/amazon/chroot: Attach volume
builder/amazon/chroot: more valid transition states while detaching
builder/amazon/chroot: put device in state bag
builder/amazon/chroot: only let it run on Linux
builder/amazon/chroot: fix types
builder/amazon/chroot: improved logging about what volume created
builder/amazon/chroot: more settings, validation
builder/amazon/chroot: mount the root device