// GetCurrentModel returns the name of the current Juju model.
//
// If $JUJU_MODEL is set, use that. Otherwise, get the current
// controller by reading $XDG_DATA_HOME/juju/current-controller,
// and then identifying the current model for that controller
// in models.yaml. If there is no current controller, or no
// current model for that controller, then an empty string is
// returned. It is not an error to have no default model.
func GetCurrentModel(store jujuclient.ClientStore) (string, error) {
if model := os.Getenv(osenv.JujuModelEnvKey); model != "" {
return model, nil
}
currentController, err := ReadCurrentController()
if err != nil {
return "", errors.Trace(err)
}
if currentController == "" {
return "", nil
}
currentAccount, err := store.CurrentAccount(currentController)
if errors.IsNotFound(err) {
return "", nil
} else if err != nil {
return "", errors.Trace(err)
}
currentModel, err := store.CurrentModel(currentController, currentAccount)
if errors.IsNotFound(err) {
return "", nil
} else if err != nil {
return "", errors.Trace(err)
}
return currentModel, nil
}
func (c *JujuCommandBase) missingModelError(store jujuclient.ClientStore, controllerName, modelName string) error {
// First, we'll try and clean up the missing model from the local cache.
err := store.RemoveModel(controllerName, modelName)
if err != nil {
logger.Warningf("cannot remove unknown model from cache: %v", err)
}
currentModel, err := store.CurrentModel(controllerName)
if err != nil {
logger.Warningf("cannot read current model: %v", err)
} else if currentModel == modelName {
if err := store.SetCurrentModel(controllerName, ""); err != nil {
logger.Warningf("cannot reset current model: %v", err)
}
}
errorMessage := "model %q has been removed from the controller, run 'juju models' and switch to one of them."
modelInfoMessage := "\nThere are %d accessible models on controller %q."
models, err := store.AllModels(controllerName)
if err == nil {
modelInfoMessage = fmt.Sprintf(modelInfoMessage, len(models), controllerName)
} else {
modelInfoMessage = ""
}
return errors.Errorf(errorMessage+modelInfoMessage, modelName)
}