repocli: first version of pull & push image

pkg/repocli/pullimage.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
-	"fmt"
 	"os"
 
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
@@ -35,9 +34,8 @@ func (down *Loader) Pull(ctx context.Context, rawref, dir, osname, arch string)
 		return err
 	}
 	rawrepo := ref.RawRepo()
-	tag := ref.Tag()
 
-	exist, mime, man, err := down.cli.GetRawManifest(ctx, ref.Raw())
+	exist, mime, man, digstr, err := down.cli.GetRawManifest(ctx, ref.Raw())
 	if err != nil {
 		return err
 	}
@@ -45,8 +43,7 @@ func (down *Loader) Pull(ctx context.Context, rawref, dir, osname, arch string)
 		err = errors.New("Manifest not found")
 		return err
 	}
-
-	var digstr string
+	tag := ref.Tag()
 	if mime == MediaTypeOIIv1 || mime == MediaTypeDDMLv2 {
 		var index ocispec.Index
 		err = json.Unmarshal(man, &index)
@@ -63,25 +60,24 @@ func (down *Loader) Pull(ctx context.Context, rawref, dir, osname, arch string)
 				}
 			}
 		}
-	}
-	if digstr == "" {
-		err = errors.New("Manifest for required arch and OS not found")
-		return err
-	}
-	fmt.Printf("Tag: %s\n", tag)
-	exist, mime, man, err = down.cli.GetRawManifest(ctx, ref.RawWithTag(digstr))
-	if err != nil {
-		return err
-	}
-	fmt.Printf("Mime: %s\n", mime)
-	if !exist {
-		err = errors.New("Manifest not found")
-		return err
-	}
-	if mime != MediaTypeOIMv1 && mime != MediaTypeDDMv2 {
+		if tag == "" {
+			err = errors.New("Manifest for required arch and OS not found")
+			return err
+		}
+
+		exist, mime, man, digstr, err = down.cli.GetRawManifest(ctx, ref.RawWithTag(tag))
+		if err != nil {
+			return err
+		}
+		if !exist {
+			err = errors.New("Manifest not found")
+			return err
+		}
+	} else if mime != MediaTypeOIMv1 && mime != MediaTypeDDMv2 {
 		err = errors.New("Unknown manifest media type")
 		return err
 	}
+
 	var manifest ocispec.Manifest
 	err = json.Unmarshal(man, &manifest)
 	if err != nil {