Record the original reference.Named in imageParts

We will eventually want to eliminate most members of imageParts
in favor of using the c/image/docker/reference API directly.

For now, just record the reference.Named value, and we will
replace uses of the other members before removing them.

Should not change behavior.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

libpod/image/parts.go

@@ -9,12 +9,13 @@ import (
 
 // imageParts describes the parts of an image's name
 type imageParts struct {
-	transport   string
-	registry    string
-	name        string
-	tag         string
-	isTagged    bool
-	hasRegistry bool
+	unnormalizedRef reference.Named // WARNING: Did not go through docker.io[/library] normalization
+	transport       string
+	registry        string
+	name            string
+	tag             string
+	isTagged        bool
+	hasRegistry     bool
 }
 
 // Registries must contain a ":" or a "." or be localhost
@@ -45,6 +46,7 @@ func decompose(input string) (imageParts, error) {
 	if err != nil {
 		return parts, err
 	}
+	unnormalizedNamed := imgRef.(reference.Named)
 	ntag, isTagged := imgRef.(reference.NamedTagged)
 	if !isTagged {
 		tag = "latest"
@@ -54,8 +56,8 @@ func decompose(input string) (imageParts, error) {
 	} else {
 		tag = ntag.Tag()
 	}
-	registry := reference.Domain(imgRef.(reference.Named))
-	imageName := reference.Path(imgRef.(reference.Named))
+	registry := reference.Domain(unnormalizedNamed)
+	imageName := reference.Path(unnormalizedNamed)
 	// Is this a registry or a repo?
 	if isRegistry(registry) {
 		hasRegistry = true
@@ -66,12 +68,13 @@ func decompose(input string) (imageParts, error) {
 		}
 	}
 	return imageParts{
-		registry:    registry,
-		hasRegistry: hasRegistry,
-		name:        imageName,
-		tag:         tag,
-		isTagged:    isTagged,
-		transport:   DefaultTransport,
+		unnormalizedRef: unnormalizedNamed,
+		registry:        registry,
+		hasRegistry:     hasRegistry,
+		name:            imageName,
+		tag:             tag,
+		isTagged:        isTagged,
+		transport:       DefaultTransport,
 	}, nil
 }