func environProvider(st *state.State) (environs.EnvironProvider, error) {
model, err := st.Model()
if err != nil {
return nil, errors.Annotate(err, "getting model")
}
cloud, err := st.Cloud(model.Cloud())
if err != nil {
return nil, errors.Annotate(err, "getting cloud")
}
// EnvironProvider implements state.ConfigValidator.
return environs.Provider(cloud.Type)
}
// retrieveLatestCharmInfo looks up the charm store to return the charm URLs for the
// latest revision of the deployed charms.
func retrieveLatestCharmInfo(st *state.State) ([]latestCharmInfo, error) {
// First get the uuid for the environment to use when querying the charm store.
env, err := st.Model()
if err != nil {
return nil, err
}
services, err := st.AllApplications()
if err != nil {
return nil, err
}
client, err := NewCharmStoreClient(st)
if err != nil {
return nil, errors.Trace(err)
}
var charms []charmstore.CharmID
var resultsIndexedServices []*state.Application
for _, service := range services {
curl, _ := service.CharmURL()
if curl.Schema == "local" {
// Version checking for charms from local repositories is not
// currently supported, since we don't yet support passing in
// a path to the local repo. This may change if the need arises.
continue
}
cid := charmstore.CharmID{
URL: curl,
Channel: service.Channel(),
}
charms = append(charms, cid)
resultsIndexedServices = append(resultsIndexedServices, service)
}
metadata := map[string]string{
"environment_uuid": env.UUID(),
"cloud": env.Cloud(),
"cloud_region": env.CloudRegion(),
}
cloud, err := st.Cloud(env.Cloud())
if err != nil {
metadata["provider"] = "unknown"
} else {
metadata["provider"] = cloud.Type
}
results, err := charmstore.LatestCharmInfo(client, charms, metadata)
if err != nil {
return nil, err
}
var latest []latestCharmInfo
for i, result := range results {
if result.Error != nil {
logger.Errorf("retrieving charm info for %s: %v", charms[i].URL, result.Error)
continue
}
service := resultsIndexedServices[i]
latest = append(latest, latestCharmInfo{
CharmInfo: result.CharmInfo,
service: service,
})
}
return latest, nil
}