remove daemon check

Author: nkubala

cmd/root.go

@@ -44,7 +44,6 @@ import (
 )
 
 var json bool
-var isDaemon bool
 
 var save bool
 var types diffTypes
@@ -154,6 +153,7 @@ func getImageForName(imageName string) (pkgutil.Image, error) {
 		}
 
 		start := time.Now()
+		// TODO(nkubala): specify gzip.NoCompression here when functional options are supported
 		img, err = daemon.Image(ref, &daemon.ReadOptions{
 			Buffer: true,
 		})
@@ -162,7 +162,6 @@ func getImageForName(imageName string) (pkgutil.Image, error) {
 		}
 		elapsed := time.Now().Sub(start)
 		logrus.Infof("retrieving image from daemon took %f seconds", elapsed.Seconds())
-		isDaemon = true
 	} else {
 		// either has remote prefix or has no prefix, in which case we force remote
 		imageName = strings.Replace(imageName, RemotePrefix, "", -1)
@@ -232,10 +231,6 @@ func getImageForName(imageName string) (pkgutil.Image, error) {
 }
 
 func getExtractPathForImage(imageName string, image v1.Image) (string, error) {
-	if isDaemon {
-		// since we have to compress the image to get the digest, don't cache daemon images
-		return getExtractPathForName(imageName)
-	}
 	start := time.Now()
 	digest, err := image.Digest()
 	if err != nil {