Imports launchpad.net/goyaml launchpad.net/juju-core/errors launchpad.net/juju-core/log launchpad.net/juju-core/state launchpad.net/juju-core/state/api launchpad.net/juju-core/state/api/params launchpad.net/juju-core/utils launchpad.net/juju-core/version Standard library imports archive/tar compress/gzip fmt io io/ioutil os path regexp strings