support recursive inclusion

main.go

@@ -119,7 +119,11 @@ func ParseList(list *List, ref map[string]*List) (*ParsedList, error) {
 		Name:      list.Name,
 		Inclusion: make(map[string]bool),
 	}
-	for _, entry := range list.Entry {
+	entryList := list.Entry
+	for {
+		newEntryList := make([]Entry, 0, len(entryList))
+		hasInclude := false
+		for _, entry := range entryList {
 			if entry.Type == "include" {
 				if pl.Inclusion[entry.Value] {
 					continue
@@ -130,11 +134,18 @@ func ParseList(list *List, ref map[string]*List) (*ParsedList, error) {
 				if r == nil {
 					return nil, errors.New(entry.Value + " not found.")
 				}
-			pl.Entry = append(pl.Entry, r.Entry...)
+				newEntryList = append(newEntryList, r.Entry...)
+				hasInclude = true
 			} else {
-			pl.Entry = append(pl.Entry, entry)
+				newEntryList = append(newEntryList, entry)
 			}
 		}
+		entryList = newEntryList
+		if !hasInclude {
+			break
+		}
+	}
+	pl.Entry = entryList
 
 	return pl, nil
 }