fix the nil and the unit test

api/oci/extensions/repositories/ocireg/repository.go

@@ -121,16 +121,23 @@ func (r *RepositoryImpl) getResolver(comp string) (regclient.Resolver, error) {
 		logger.Trace("no credentials")
 	}
 
-	pass := creds.GetProperty(credentials.ATTR_IDENTITY_TOKEN)
-	if pass == "" {
-		pass = creds.GetProperty(credentials.ATTR_PASSWORD)
+	var (
+		password, username string
+	)
+
+	if creds != nil {
+		password = creds.GetProperty(credentials.ATTR_IDENTITY_TOKEN)
+		if password == "" {
+			password = creds.GetProperty(credentials.ATTR_PASSWORD)
+		}
+		username = creds.GetProperty(credentials.ATTR_USERNAME)
 	}
-	username := creds.GetProperty(credentials.ATTR_USERNAME)
+
 	opts := regclient.ClientOptions{
 		Host: &regconfig.Host{
-			Name: "ghcr.io",
+			Name: "ghcr.io", //TODO: Need to figure out how to set the host.
 			User: username,
-			Pass: pass,
+			Pass: password,
 		},
 		Version: comp,
 	}

api/tech/regclient/client.go

@@ -141,16 +141,15 @@ func (c *Client) Resolve(ctx context.Context, ref string) (string, ociv1.Descrip
 		if strings.Contains(err.Error(), "not found") {
 			// fallback to finding a blob if we have a digest
 			if r.Digest != "" {
-				blob, err := c.rc.BlobHead(ctx, r, descriptor.Descriptor{
+				blob, err := c.rc.BlobGet(ctx, r, descriptor.Descriptor{
 					Digest: digest.Digest(r.Digest),
-					Size:   -1,
 				})
 				if err != nil {
 					if strings.Contains(err.Error(), "not found") {
 						return "", ociv1.Descriptor{}, errdefs.ErrNotFound
 					}
 
-					return "", ociv1.Descriptor{}, err
+					return "", ociv1.Descriptor{}, fmt.Errorf("failed to resolve blob head: %w", err)
 				}
 
 				return ref, c.convertDescriptorToOCI(blob.GetDescriptor()), nil
@@ -196,6 +195,7 @@ func (c *Client) Lister(ctx context.Context, ref string) (Lister, error) {
 }
 
 func (c *Client) Push(ctx context.Context, d ociv1.Descriptor, src Source) (PushRequest, error) {
+	fmt.Println("IN FUCKING PUSH: ", d)
 	reader, err := src.Reader()
 	if err != nil {
 		return nil, err
@@ -249,9 +249,13 @@ func (c *Client) Fetch(ctx context.Context, desc ociv1.Descriptor) (_ io.ReadClo
 	}()
 
 	// set up closing the client after fetching is done.
+	// -1 is not a thing in regclient.
+	if desc.Size < 0 {
+		desc.Size = 0
+	}
 	reader, err := c.rc.BlobGet(ctx, c.ref, c.convertDescriptorToRegClient(desc))
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to get the blob reader: %w", err)
 	}
 
 	return reader, nil