[scorpio]:fix clippy

scorpio/doc/develop.md

@@ -3,4 +3,5 @@
 runner = 'sudo -E'
 
 # dependencies
-sudo apt install libfuse-dev
+sudo apt install libfuse-dev
+sudo apt install librust-openssl-dev

scorpio/src/manager/diff.rs

@@ -1,6 +1,6 @@
 use std::{ffi::CString, fs};
 use std::path::Path;
-use libc::{self, stat, S_IFCHR};
+use libc::{self, stat};
 use mercury::hash::SHA1;
 
 fn collect_paths<P: AsRef<Path>>(path: P) -> Vec<String> {
@@ -36,10 +36,10 @@ fn is_whiteout_inode(path: &String) -> bool {
 
     false
 }
-
+#[allow(unused)]
 fn diff(lower: String, upper:String){
     let upper_changes = collect_paths(&lower); 
-    let root_len = lower.len();
+    let _root_len = lower.len();
     for node in upper_changes {
             if is_whiteout_inode(&node){
                 // delte a bolb from a tree .

scorpio/src/manager/mod.rs

@@ -1,6 +1,5 @@
 use serde::{Deserialize, Serialize};
 use std::fs;
-use toml;
 
 mod diff;
 #[derive(Serialize,Deserialize)]
@@ -14,6 +13,7 @@ struct WorkDir{
     path:String,
     hash:String,
 }
+#[allow(unused)]
 impl ScorpioManager {
     fn from_toml(file_path: &str) -> Result<Self, Box<dyn std::error::Error>> {
         let content = fs::read_to_string(file_path)?;