Imports github.com/mitchellh/goamz/aws github.com/mitchellh/goamz/ec2 github.com/mitchellh/multistep github.com/mitchellh/packer/builder/amazon/common github.com/mitchellh/packer/common github.com/mitchellh/packer/packer Standard library imports bytes errors fmt io io/ioutil log os os/exec path/filepath runtime strings syscall time