Refactor gRPC-based image functions

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/pkg/image/rename.go

@@ -0,0 +1,60 @@
+package image
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/warewulf/warewulf/internal/pkg/node"
+	"github.com/warewulf/warewulf/internal/pkg/wwlog"
+)
+
+func Rename(name string, targetName string, build bool) error {
+	if !ValidSource(name) {
+		return fmt.Errorf("image source does not exist: %s", name)
+	}
+	if !ValidName(targetName) {
+		return fmt.Errorf("invalid image name: %s", targetName)
+	}
+
+	// rename the image source folder
+	sourceDir := SourceDir(name)
+	destDir := SourceDir(targetName)
+	err := os.Rename(sourceDir, destDir)
+	if err != nil {
+		return err
+	}
+
+	err = DeleteImage(name)
+	if err != nil {
+		wwlog.Warn("Could not remove image files for %s: %s", name, err)
+	}
+
+	if build {
+		err = Build(targetName, true)
+		if err != nil {
+			return err
+		}
+	}
+
+	// update the nodes profiles image name
+	nodeDB, err := node.New()
+	if err != nil {
+		return err
+	}
+
+	for nodeId, node := range nodeDB.Nodes {
+		if node.ImageName == name {
+			wwlog.Debug("updating node %s image to %s", nodeId, targetName)
+			nodeDB.Nodes[nodeId].ImageName = targetName
+		}
+	}
+
+	for profileId, profile := range nodeDB.NodeProfiles {
+		if profile.ImageName == name {
+			wwlog.Debug("updating profile %s image to %s", profileId, targetName)
+			nodeDB.NodeProfiles[profileId].ImageName = targetName
+		}
+	}
+
+	return nodeDB.Persist()
+}