Adds command output for KicDriver pull/load

we only return err, because messages are already carried
by the KicDriver bin itself

pkg/drivers/kic/oci/cache.go

@@ -17,6 +17,7 @@ limitations under the License.
 package oci
 
 import (
+	"os"
 	"os/exec"
 	"strings"
 
@@ -26,9 +27,12 @@ import (
 // ToDriverCache
 // calls OCIBIN's load command at specified path:
 // loads the archived container image at provided PATH.
-func ArchiveToDriverCache(ociBin, path string) (string, error) {
-	_, err := runCmd(exec.Command(ociBin, "load", "-i", path))
-	return "", err
+func ArchiveToDriverCache(ociBin, path string) error {
+	cmd := exec.Command(ociBin, "load", "-i", path)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	return err
 }
 
 // IsInCache

pkg/drivers/kic/oci/download.go

@@ -17,11 +17,15 @@ limitations under the License.
 package oci
 
 import (
-	"bytes"
 	"os/exec"
+	"strings"
 )
 
-func PullImage(ociBin, img string) (bytes.Buffer, error) {
-	res, err := runCmd(exec.Command(ociBin, "pull", "--quiet", img))
-	return res.Stdout, err
+func PullImage(ociBin, img string) error {
+	rr, err := runCmd(exec.Command(ociBin, "pull", "--quiet", img))
+	if strings.Contains(rr.Stdout.String(), "Loaded image:") {
+		return nil
+	}
+	return err
+
 }

pkg/minikube/download/image.go

@@ -195,8 +195,7 @@ func parseImage(img string) (*name.Tag, name.Reference, error) {
 // loads a locally minikube-cached container image, to the KIC-driver's cache
 func CacheToKicDriver(ociBin string, img string) error {
 	p := imagePathInMinikubeCache(img)
-	resp, err := oci.ArchiveToDriverCache(ociBin, p)
-	klog.V(2).Infof("response: %s", resp)
+	err := oci.ArchiveToDriverCache(ociBin, p)
 	return err
 }
 
@@ -230,7 +229,9 @@ func ImageToKicDriver(ociBin, img string) error {
 	}
 
 	klog.V(3).Infof("Pulling image %v", ref)
-	if _, err := oci.PullImage(ociBin, img); err != nil {
+	// an image pull for the digest at this point is not a bad thing..
+	// images are pulled by layers and we already have the biggest part
+	if err := oci.PullImage(ociBin, img); err != nil {
 		return errors.Wrap(err, "pulling remote image")
 	}
 	return nil