func waitFor(once *sync.Once, client dockerclient.APIClient, endpoint string) {
once.Do(func() {
err := ClientOK(endpoint, func() bool {
_, err := client.Info(context.Background())
return err == nil
})
if err != nil {
panic(err.Error())
}
})
}
// Reference returns the reference of a node. The special value "self" for a node
// reference is mapped to the current node, hence the node ID is retrieved using
// the `/info` endpoint.
func Reference(client apiclient.APIClient, ctx context.Context, ref string) (string, error) {
if ref == "self" {
info, err := client.Info(ctx)
if err != nil {
return "", err
}
return info.Swarm.NodeID, nil
}
return ref, nil
}
func nodeReference(client apiclient.APIClient, ctx context.Context, ref string) (string, error) {
// The special value "self" for a node reference is mapped to the current
// node, hence the node ID is retrieved using the `/info` endpoint.
if ref == "self" {
info, err := client.Info(ctx)
if err != nil {
return "", err
}
return info.Swarm.NodeID, nil
}
return ref, nil
}