initial work on registry client

registry/registry.go

@@ -0,0 +1,72 @@
+package registry
+
+import (
+	"errors"
+
+	// "github.com/docker/distribution/digest"
+	// "github.com/docker/distribution/manifest"
+	// "github.com/docker/libtrust"
+	"github.com/rusenask/docker-registry-client/registry"
+)
+
+// errors
+var (
+	ErrTagNotSupplied = errors.New("tag not supplied")
+)
+
+type Repository struct {
+	Name string
+	Tags []string
+}
+
+type Client interface {
+}
+
+func New() *DefaultClient {
+	return &DefaultClient{}
+}
+
+type DefaultClient struct {
+}
+
+type Opts struct {
+	Registry, Name, Tag string
+	Username, Password  string // if "" - anonymous
+}
+
+// Get - get repository
+func (c *DefaultClient) Get(opts Opts) (*Repository, error) {
+
+	repo := &Repository{}
+	hub, err := registry.New(opts.Registry, opts.Username, opts.Password)
+	if err != nil {
+		return nil, err
+	}
+
+	tags, err := hub.Tags(opts.Name)
+	if err != nil {
+		return nil, err
+	}
+	repo.Tags = tags
+
+	return repo, nil
+}
+
+// Digest - get digest for repo
+func (c *DefaultClient) Digest(opts Opts) (digest string, err error) {
+	if opts.Tag == "" {
+		return "", ErrTagNotSupplied
+	}
+
+	hub, err := registry.New(opts.Registry, opts.Username, opts.Password)
+	if err != nil {
+		return
+	}
+
+	manifestDigest, err := hub.ManifestDigest(opts.Name, opts.Tag)
+	if err != nil {
+		return
+	}
+
+	return manifestDigest.String(), nil
+}