Imports github.com/mitchellh/packer/packer github.com/mitchellh/packer/template/interpolate github.com/mitchellh/go-fs github.com/mitchellh/multistep github.com/mitchellh/go-fs/fat Standard library imports bufio bytes hash io io/ioutil log math/rand net net/http net/url os path/filepath runtime strings time crypto/sha512 crypto/sha256 crypto/sha1 crypto/md5 encoding/hex errors fmt