// serviceSetCharm1dot16 sets the charm for the given service in 1.16
// compatibility mode. Remove this when support for 1.16 is dropped.
func (c *Client) serviceSetCharm1dot16(service *state.Service, curl *charm.URL, force bool) error {
if curl.Schema != "cs" {
return fmt.Errorf(`charm url has unsupported schema %q`, curl.Schema)
}
if curl.Revision < 0 {
return fmt.Errorf("charm url must include revision")
}
err := c.AddCharm(params.CharmURL{curl.String()})
if err != nil {
return err
}
ch, err := c.api.state.Charm(curl)
if err != nil {
return err
}
return service.SetCharm(ch, force)
}
// serviceSetCharm sets the charm for the given service.
func (c *Client) serviceSetCharm(service *state.Service, url string, force bool) error {
curl, err := charm.ParseURL(url)
if err != nil {
return err
}
sch, err := c.api.state.Charm(curl)
if errors.IsNotFound(err) {
// Charms should be added before trying to use them, with
// AddCharm or AddLocalCharm API calls. When they're not,
// we're reverting to 1.16 compatibility mode.
return c.serviceSetCharm1dot16(service, curl, force)
}
if err != nil {
return err
}
return service.SetCharm(sch, force)
}