Imports github.com/hashicorp/packer/common github.com/hashicorp/packer/helper/config github.com/hashicorp/packer/packer github.com/hashicorp/packer/template/interpolate github.com/klauspost/pgzip github.com/mitchellh/mapstructure Standard library imports compress/flate text/template archive/tar bytes encoding/json errors fmt io io/ioutil log os path/filepath regexp runtime strings