filter directories in pull command to eliminate files in parent folder

Author: physcrowley

cmd/gh-classroom/pull/student-repos/student-repos.go

@@ -71,11 +71,19 @@ func NewCmdStudentReposPull(f *cmdutil.Factory) *cobra.Command {
 				log.Fatal(err)
 			}
 
-			entries, err := os.ReadDir(fullPath)
+			all_entries, err := os.ReadDir(fullPath)
 			if err != nil {
 				log.Fatal(err)
 			}
 
+			//filter entries to only directories
+			var entries []os.DirEntry
+			for _, r := range all_entries {
+				if r.IsDir() {
+					entries = append(entries, r)
+				}
+			}
+
 			for _, r := range entries {
 				clonePath := filepath.Join(fullPath, r.Name())
 				fmt.Printf("Pulling repo: %v\n", clonePath)