Allow for exercises in 'exercises' subdirectory

configlet/track.go

@@ -93,30 +93,30 @@ func (t Track) Dirs() (map[string]struct{}, error) {
 	}
 
 	for _, info := range infos {
-		if info.IsDir() {
+		if info.IsDir() && info.Name() != "exercises" {
 			dirs[info.Name()] = struct{}{}
 		}
 	}
-	return dirs, nil
-}
 
-// ExerciseDirs lists all directories within the "exercises" directory.
-// An implemented problem must be either in the root (legacy) or in the
-// exercises dir.
-func (t Track) ExerciseDirs() (map[string]struct{}, error) {
-	dirs := make(map[string]struct{})
+	path := filepath.Join(t.path, "exercises")
+	if _, err := os.Stat(path); err != nil {
+		if os.IsNotExist(err) {
+			return dirs, nil
+		}
+		return dirs, err
+	}
 
-	infos, err := ioutil.ReadDir(filepath.Join(t.path, "exercises"))
+	infos, err = ioutil.ReadDir(filepath.Join(t.path, "exercises"))
 	if err != nil {
-		fmt.Println(err)
 		return dirs, err
 	}
 
 	for _, info := range infos {
-		if info.IsDir() {
+		if info.IsDir() && info.Name() != "exercises" {
 			dirs[info.Name()] = struct{}{}
 		}
 	}
+
 	return dirs, nil
 }