// fetchAllDeployedCharms returns a map from service name to service
// and a map from service name to unit name to unit.
func fetchAllDeployedCharms(st *state.State) (map[string]*charm.URL, error) {
deployedCharms := make(map[string]*charm.URL)
services, err := st.AllServices()
if err != nil {
return nil, err
}
for _, s := range services {
url, _ := s.CharmURL()
// Record the basic charm information so it can be bulk processed later to
// get the available revision numbers from the repo.
baseCharm := url.WithRevision(-1)
deployedCharms[baseCharm.String()] = baseCharm
}
return deployedCharms, nil
}
