diff --git a/src/commands/add.rs b/src/commands/add.rs
index bf920ab..f9598ed 100644
--- a/src/commands/add.rs
+++ b/src/commands/add.rs
@@ -1,11 +1,11 @@
-use std::env;
-use std::path::{Path, PathBuf};
-use colored::Colorize;
-use sha1::Digest;
 use crate::models::blob::Blob;
 use crate::models::index::{FileMetaData, Index};
 use crate::utils::util::{check_repo_exist, get_relative_path, get_working_dir, list_files};
+use colored::Colorize;
+use std::env;
+use std::path::{Path, PathBuf};
 
+// TODO: fatal: ../moj/app.py: '../moj/app.py' is outside repository at 'Git-Rust'
 pub fn add(files: Vec<String>, all: bool, mut update: bool) {
     check_repo_exist();
     let mut index = Index::new();
@@ -13,8 +13,9 @@ pub fn add(files: Vec<String>, all: bool, mut update: bool) {
 
     let mut files: Vec<PathBuf> = files.into_iter().map(PathBuf::from).collect();
 
-    if dot || all || update{
-        if all { // all 优先级最高
+    if dot || all || update {
+        if all {
+            // all 优先级最高
             dot = false;
             update = false;
         } else if update {
@@ -31,9 +32,7 @@ pub fn add(files: Vec<String>, all: bool, mut update: bool) {
         println!("Working on [{}]\n", path.to_str().unwrap().bright_blue());
         files = list_files(&path).unwrap();
         if update {
-            files.retain(|file|{
-                index.contains(file)
-            });
+            files.retain(|file| index.contains(file));
         }
 
         files.extend(index.get_deleted_files()); //包含已删除的文件
@@ -47,22 +46,28 @@ pub fn add(files: Vec<String>, all: bool, mut update: bool) {
 fn add_a_file(file: &Path, index: &mut Index) {
     let relative_path = get_relative_path(file, &get_working_dir().unwrap());
 
-    if !file.exists() { //文件被删除
+    if !file.exists() {
+        //文件被删除
         index.remove(file);
         println!("removed: {}", relative_path.display());
-    } else { //文件存在
-        if !index.contains(file) { //文件未被跟踪
+    } else {
+        //文件存在
+        if !index.contains(file) {
+            //文件未被跟踪
             let blob = Blob::new(file);
             index.add(file.to_path_buf(), FileMetaData::new(&blob, file));
             println!("add(stage): {}", relative_path.display());
-        } else { //文件已被跟踪，可能被修改
-            if index.is_modified(file) { //文件被修改，但不一定内容更改
+        } else {
+            //文件已被跟踪，可能被修改
+            if index.is_modified(file) {
+                //文件被修改，但不一定内容更改
                 let blob = Blob::new(file); //到这一步才创建blob是为了优化
-                if !index.verify_hash(file, &blob.get_hash()) { //比较hash 确认内容更改
+                if !index.verify_hash(file, &blob.get_hash()) {
+                    //比较hash 确认内容更改
                     index.update(file.to_path_buf(), FileMetaData::new(&blob, file));
                     println!("add(modified): {}", relative_path.display());
                 }
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/commands/status.rs b/src/commands/status.rs
index a16e793..8f80af4 100644
--- a/src/commands/status.rs
+++ b/src/commands/status.rs
@@ -22,7 +22,7 @@ pub fn changes_to_be_committed() -> Changes {
     let tracked_files = index
         .get_tracked_files()
         .iter()
-        .map(|f| util::to_root_relative_path(f))
+        .map(|f| util::to_workdir_relative_path(f))
         .collect::<Vec<PathBuf>>();
     if head_hash == "" {
         // 初始提交
@@ -43,7 +43,7 @@ pub fn changes_to_be_committed() -> Changes {
                 change.modified.push(tree_file.clone());
             }
         } else {
-            change.deleted.push(tree_file.clone()); //todo: abs_path?
+            change.deleted.push(tree_file.clone());
         }
     }
     for index_file in index_files.iter() {
diff --git a/src/models/tree.rs b/src/models/tree.rs
index 1671c68..310d336 100644
--- a/src/models/tree.rs
+++ b/src/models/tree.rs
@@ -91,7 +91,7 @@ impl Tree {
         let file_entries: Vec<PathBuf> = index
             .get_tracked_files()
             .iter_mut()
-            .map(|file| util::to_root_relative_path(file))
+            .map(|file| util::to_workdir_relative_path(file))
             .collect();
 
         store_path_to_tree(&file_entries, "".to_string().into())
diff --git a/src/utils/util.rs b/src/utils/util.rs
index cf56731..4dcda84 100644
--- a/src/utils/util.rs
+++ b/src/utils/util.rs
@@ -153,7 +153,6 @@ pub fn list_files(path: &Path) -> io::Result<Vec<PathBuf>> {
 }
 
 /// 获取相对于dir的相对路径
-/// XXX 是否只能用在windows？是否检查dir是否是path的父目录？
 pub fn get_relative_path(path: &Path, dir: &Path) -> PathBuf {
     let path = if path.is_relative() {
         get_absolute_path(path)
@@ -165,7 +164,7 @@ pub fn get_relative_path(path: &Path, dir: &Path) -> PathBuf {
 }
 
 /// 获取相较于工作区(Working Dir)的相对路径
-pub fn to_root_relative_path(path: &Path) -> PathBuf { //todo: rename
+pub fn to_workdir_relative_path(path: &Path) -> PathBuf {
     get_relative_path(path, &get_working_dir().unwrap())
 }