prefer profile overlay value over node one

Signed-off-by: xu yang <xyang@ciq.com>

internal/pkg/node/list.go

@@ -32,11 +32,19 @@ func recursiveFields(obj interface{}, emptyFields bool, prefix string) (output [
 		if typeObj.Elem().Field(i).Type == reflect.TypeOf(Entry{}) {
 			myField := valObj.Elem().Field(i).Interface().(Entry)
 			if emptyFields || myField.Get() != "" {
-				output = append(output, NodeFields{
-					Field:  prefix + typeObj.Elem().Field(i).Name,
-					Source: myField.Source(),
-					Value:  myField.Print(),
-				})
+				if typeObj.Elem().Field(i).Name == "SystemOverlay" {
+					output = append(output, NodeFields{
+						Field:  prefix + typeObj.Elem().Field(i).Name,
+						Source: myField.Source(),
+						Value:  myField.PrintPreferAlt(),
+					})
+				} else {
+					output = append(output, NodeFields{
+						Field:  prefix + typeObj.Elem().Field(i).Name,
+						Source: myField.Source(),
+						Value:  myField.Print(),
+					})
+				}
 			}
 		} else if typeObj.Elem().Field(i).Type == reflect.TypeOf(map[string]*Entry{}) {
 			for key, val := range valObj.Elem().Field(i).Interface().(map[string]*Entry) {

internal/pkg/node/methods.go

@@ -287,6 +287,17 @@ func (ent *Entry) GetSlice() []string {
 	return []string{}
 }
 
+func (ent *Entry) GetSlicePreferAlt() []string {
+	retval := append(ent.altvalue, ent.value...)
+	if len(retval) != 0 {
+		return cleanList(retval)
+	}
+	if len(ent.def) != 0 {
+		return ent.def
+	}
+	return []string{}
+}
+
 /*
 Get the real value, not the alternative of default one.
 */
@@ -388,6 +399,43 @@ func (ent *Entry) Print() string {
 	return "--"
 }
 
+/* Gets the the entry of the value in following order
+* profile value if set
+* node value if set
+* default value if set
+ */
+func (ent *Entry) PrintPreferAlt() string {
+	if !ent.isSlice {
+		if len(ent.altvalue) != 0 {
+			return ent.altvalue[0]
+		}
+		if len(ent.value) != 0 {
+			return ent.value[0]
+		}
+		if len(ent.def) != 0 {
+			return "(" + ent.def[0] + ")"
+		}
+	} else {
+		var ret string
+		if len(ent.value) != 0 || len(ent.altvalue) != 0 {
+			combList := append(ent.altvalue, ent.value...)
+			ret = strings.Join(cleanList(combList), ",")
+			if len(negList(combList)) > 0 {
+				ret += " ~{" + strings.Join(negList(combList), ",") + "}"
+			}
+
+		}
+		if ret != "" {
+			return ret
+		}
+		if len(ent.def) != 0 {
+			return "(" + strings.Join(ent.def, ",") + ")"
+		}
+
+	}
+	return "--"
+}
+
 /*
 Was used for combined stringSlice