repocli: first version of pull & push image

pkg/repocli/getman.go

@@ -13,61 +13,62 @@ import (
 	ocidigest "github.com/opencontainers/go-digest"
 )
 
-func (cli *Client) GetRawManifest(ctx context.Context, rawrepo string) (bool, string, []byte, error) {
+func (cli *Client) GetRawManifest(ctx context.Context, rawrepo string) (bool, string, []byte, string, error) {
 	var err error
 	var exist bool
 	var mime string
 	var man []byte
+	var digstr string
 
 	fmt.Printf("=== %s\n", rawrepo)
 	ref, err := NewReferer(rawrepo)
 	if err != nil {
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	uri := ref.ManifestEP()
 
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, uri, nil)
 	if err != nil {
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	req.Header.Set("User-Agent", cli.userAgent)
 	req.Header.Set("Accept", "*/*")
 	resp, err := cli.httpClient.Do(req)
 	if err != nil {
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode == http.StatusNotFound {
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	if resp.StatusCode != http.StatusOK {
 		err := fmt.Errorf("Unxected response code %s", resp.Status)
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
-	digstr := resp.Header.Get("Docker-Content-Digest")
+	digstr = resp.Header.Get("Docker-Content-Digest")
 	if digstr == "" {
 		err := fmt.Errorf("Empty digest declaration")
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	contentLength := resp.Header.Get("Content-Length")
 	if contentLength == "" {
 		err = errors.New("Empty Content-Length header")
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	manSize, err := strconv.ParseInt(contentLength, 10, 64)
 	if err != nil {
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	mime = resp.Header.Get("Content-Type")
 	if mime == "" {
 		err := fmt.Errorf("Empty MIME type declaration")
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	digstr = strings.ToLower(digstr)
 	digobj, err := ocidigest.Parse(digstr)
 	if err != nil {
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	verifier := digobj.Verifier()
 	buffer := bytes.NewBuffer(nil)
@@ -75,13 +76,13 @@ func (cli *Client) GetRawManifest(ctx context.Context, rawrepo string) (bool, st
 	recSize, err := Copy(ctx, mwriter, resp.Body)
 	if manSize != recSize {
 		err := fmt.Errorf("Mismatch declared and actual size")
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	man = buffer.Bytes()
 	if !verifier.Verified() {
 		err := fmt.Errorf("Mismatch digest declaration and actual")
-		return exist, mime, man, err
+		return exist, mime, man, digstr, err
 	}
 	exist = true
-	return exist, mime, man, err
+	return exist, mime, man, digstr, err
 }