Imports gopkg.in/errgo.v1 github.com/juju/loggo gopkg.in/juju/charmrepo.v1/csclient gopkg.in/juju/charmrepo.v1/csclient/params github.com/juju/utils gopkg.in/juju/charm.v6-unstable Standard library imports crypto/sha512 encoding/json errors fmt io io/ioutil net net/http net/url os path/filepath strings