working commit

.gitignore

@@ -13,3 +13,4 @@ cmd/mstorectl/mstorectl
 *.tmp.*
 *.tar
 *.bin
+tmp

pkg/client/imageinfo.go

@@ -0,0 +1,114 @@
+package client
+
+import (
+	"context"
+	"time"
+
+	"github.com/google/go-containerregistry/pkg/authn"
+	"github.com/google/go-containerregistry/pkg/crane"
+	"github.com/google/go-containerregistry/pkg/name"
+	pkg "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/google/go-containerregistry/pkg/v1/remote"
+	"github.com/google/go-containerregistry/pkg/v1/remote/transport"
+)
+
+type ImageDescr struct {
+	ConfigFile *pkg.ConfigFile `json:"configFile,omitempty"`
+	Manifest   *pkg.Manifest   `json:"manifest,omitempty"`
+	Tags       []string        `json:"avilableTags,omitempty"`
+}
+
+func (cli *Client) ImageInfo(ctx context.Context, imagepath string, timeout time.Duration) (*ImageDescr, error) {
+	var err error
+	res := &ImageDescr{}
+
+	ctx, _ = context.WithTimeout(ctx, timeout)
+
+	options := make([]crane.Option, 0)
+	options = append(options, crane.WithContext(ctx))
+
+	ref, err := name.ParseReference(imagepath)
+	if err != nil {
+		return res, err
+	}
+	repo := ref.Context()
+	if err != nil {
+		return res, err
+	}
+
+	if cli.username != "" && cli.password != "" {
+		defaultTransport := &roundTripper{}
+		scopes := []string{repo.Scope(transport.PullScope)}
+
+		regName := repo.RegistryStr()
+		reg, err := name.NewRegistry(regName)
+		if err != nil {
+			return res, err
+		}
+		basicAuth := &authn.Basic{
+			Username: cli.username,
+			Password: cli.password,
+		}
+		authTransport, err := transport.NewWithContext(ctx, reg, basicAuth, defaultTransport, scopes)
+		if err != nil {
+			return res, err
+		}
+		options = append(options, crane.WithTransport(authTransport))
+	} else {
+		transport := &roundTripper{}
+		options = append(options, crane.WithTransport(transport))
+	}
+
+	image, err := crane.Pull(imagepath, options...)
+	if err != nil {
+		return res, err
+	}
+
+	config, err := image.ConfigFile()
+	if err != nil {
+		return res, err
+	}
+	res.ConfigFile = config
+
+	manifest, err := image.Manifest()
+	if err != nil {
+		return res, err
+	}
+	res.Manifest = manifest
+
+	return res, err
+
+	remoteOptions := make([]remote.Option, 0)
+	remoteOptions = append(remoteOptions, remote.WithContext(ctx))
+
+	if cli.username != "" && cli.password != "" {
+		defaultTransport := &roundTripper{}
+		scopes := []string{repo.Scope(transport.PullScope)}
+
+		regName := repo.RegistryStr()
+		reg, err := name.NewRegistry(regName)
+		if err != nil {
+			return res, err
+		}
+		basicAuth := &authn.Basic{
+			Username: cli.username,
+			Password: cli.password,
+		}
+		authTransport, err := transport.NewWithContext(ctx, reg, basicAuth, defaultTransport, scopes)
+		if err != nil {
+			return res, err
+		}
+		remoteOptions = append(remoteOptions, remote.WithTransport(authTransport))
+	} else {
+		transport := &roundTripper{}
+		options = append(options, crane.WithTransport(transport))
+	}
+
+	tags, err := remote.List(repo, remoteOptions...)
+	if err != nil {
+		return res, err
+	}
+	res.Tags = tags
+
+	return res, err
+}