Imports launchpad.net/juju-core/utils/set launchpad.net/juju-core/utils/zip labix.org/v2/mgo/bson launchpad.net/goyaml launchpad.net/juju-core/charm/hooks launchpad.net/juju-core/log launchpad.net/juju-core/schema launchpad.net/juju-core/utils Standard library imports net net/http net/url os path/filepath regexp strconv strings syscall archive/zip encoding/json errors fmt io io/ioutil