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