Imports github.com/mitchellh/packer/common github.com/mitchellh/packer/helper/config github.com/mitchellh/packer/packer github.com/mitchellh/packer/packer/plugin github.com/mitchellh/packer/template/interpolate Standard library imports archive/tar compress/gzip crypto/sha1 encoding/hex encoding/json fmt io io/ioutil log net/url os path strings