*: move to containers/image

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

vendor/github.com/containers/image/docker/docker_image.go

@@ -0,0 +1,54 @@
+package docker
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/containers/image/image"
+	"github.com/containers/image/types"
+)
+
+// Image is a Docker-specific implementation of types.Image with a few extra methods
+// which are specific to Docker.
+type Image struct {
+	types.Image
+	src *dockerImageSource
+}
+
+// NewDockerImage returns a new Image interface type after setting up
+// a client to the registry hosting the given image.
+func NewDockerImage(img, certPath string, tlsVerify bool) (types.Image, error) {
+	s, err := newDockerImageSource(img, certPath, tlsVerify)
+	if err != nil {
+		return nil, err
+	}
+	return &Image{Image: image.FromSource(s), src: s}, nil
+}
+
+// SourceRefFullName returns a fully expanded name for the repository this image is in.
+func (i *Image) SourceRefFullName() string {
+	return i.src.ref.FullName()
+}
+
+// GetRepositoryTags list all tags available in the repository. Note that this has no connection with the tag(s) used for this specific image, if any.
+func (i *Image) GetRepositoryTags() ([]string, error) {
+	url := fmt.Sprintf(tagsURL, i.src.ref.RemoteName())
+	res, err := i.src.c.makeRequest("GET", url, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+	if res.StatusCode != http.StatusOK {
+		// print url also
+		return nil, fmt.Errorf("Invalid status code returned when fetching tags list %d", res.StatusCode)
+	}
+	type tagsRes struct {
+		Tags []string
+	}
+	tags := &tagsRes{}
+	if err := json.NewDecoder(res.Body).Decode(tags); err != nil {
+		return nil, err
+	}
+	return tags.Tags, nil
+}