refactor: improve perf using Path and PathBuf

src/main.rs

@@ -1,5 +1,8 @@
+use std::ffi::OsString;
 use std::fs;
 use std::env;
+use std::path::Path;
+use std::path::PathBuf;
 use colored::Colorize;
 use gitignore;
 use path_absolutize::*;
@@ -11,58 +14,59 @@ fn main() {
         return
     }
 
-    let is_ok = fs::metadata(args[1].to_owned()).is_ok();
-    if !is_ok {
+    let path = Path::new(&args[1]);
+    if !path.exists() {
         println!("{}", "ERR: Path provided does not exist".red());
         return
     }
 
-    let is_dir = fs::metadata(args[1].to_owned()).unwrap().is_dir();
-    if !is_dir {
+    if !path.is_dir() {
         println!("{}", "ERR: Path provided is not a directory".red());
         return
     }
 
     // TODO find safer way to check for gitignore (windows compatible)
-    let gi_exists = fs::metadata(args[1].to_owned() + "/.gitignore").is_ok();
+    let gi_exists = path.join(".gitignore").exists();
     if !gi_exists {
         println!("{}", "WRN: .gitignore not found, may output TODOs in dependencies".yellow())
     }
 
     let mut todos = vec!();
-
     if gi_exists {
-        let gi_str = args[1].to_owned() + "/.gitignore";
-        let _p = std::path::Path::new(&gi_str).absolutize().unwrap();
-        let gi_str_abs = _p.to_str().unwrap();
-        let gi_path = std::path::Path::new(&gi_str_abs);
-        let gi= gitignore::File::new(gi_path).unwrap();
+        let gi_path = path.join(".gitignore");
+        let gi_path_abs = gi_path.absolutize().unwrap();
+        let gi= gitignore::File::new(&gi_path_abs).unwrap();
         iterate_included_files(&mut todos, &gi).unwrap();
     } 
     else {
-        traverse_dir(&args[1], &mut todos).unwrap();
+        traverse_dir(&path, &mut todos).unwrap();
     }
 
     // TODO eventually add option to export to file
     println!("{:4} {:05} {:20} {:50}", "", "LINE".bold(), "FILE".bold(), "COMMENT".bold());
     for todo in todos {
-        println!("{:4} {:05} {:20} {:50}", "TODO".bold(), todo.line_number.to_string().yellow(), todo.file_name.green(), todo.comment);
+        println!("{:4} {:05} {:20} {:50}", "TODO".bold(), todo.line_number.to_string().yellow(), todo.file_name.into_string().unwrap().green(), todo.comment);
     }
 }
 
-fn traverse_dir(path: &str, todos: &mut Vec<Todo>) -> Result<(), std::io::Error> {    
-    let objects = fs::read_dir(path.to_owned())?;
+fn traverse_dir(path: &Path, todos: &mut Vec<Todo>) -> Result<(), std::io::Error> {    
+    let objects = fs::read_dir(path)?;
 
     for result in objects {
         let obj_path = result?.path();
-        let obj_str = obj_path.to_str().unwrap();
-        let obj_metadata = fs::metadata(obj_str)?;
-
-        if obj_metadata.is_dir() {
-            traverse_dir(obj_str, todos)?;
+        if obj_path.is_dir() {
+            traverse_dir(&obj_path, todos)?;
         }
-        else if obj_metadata.is_file() && obj_str.ends_with(".py") { // TODO support other files besides .py
-            get_todos(obj_str, todos)?;
+        else if obj_path.is_file() {
+            let extension = match obj_path.extension() {
+                Some(ext) => { ext.to_owned().into_string().unwrap() }
+                None => { String::from("") }
+            };
+
+            // TODO support other files besides .py
+            if extension == "py" { 
+                get_todos(&obj_path, todos)?;
+            }
         }
     }
     
@@ -70,26 +74,31 @@ fn traverse_dir(path: &str, todos: &mut Vec<Todo>) -> Result<(), std::io::Error>
 }
 
 fn iterate_included_files(todos: &mut Vec<Todo>, gi: &gitignore::File) -> Result<(), std::io::Error> {
-    for file_path in gi.included_files().unwrap() {
-        let file_str = file_path.to_str().unwrap();
-        if file_str.ends_with(".py") { // TODO support other files besides .py
-            get_todos(file_str, todos)?;
+    for obj_path in gi.included_files().unwrap() {
+        let extension = match obj_path.extension() {
+            Some(ext) => { ext.to_owned().into_string().unwrap() }
+            None => { String::from("") }
+        };
+
+        // TODO support other files besides .py
+        if !obj_path.is_dir() && extension == "py" { 
+            get_todos(&obj_path, todos)?;
         }
     }
     
     Ok(())
 }
 
-fn get_todos(path: &str, todos: &mut Vec<Todo>) -> Result<(), std::io::Error> {
-    let contents = fs::read_to_string(path)?;
+fn get_todos(path: &PathBuf, todos: &mut Vec<Todo>) -> Result<(), std::io::Error> {
+    let file_name = path.file_name().to_owned().unwrap();
     let mut line_number = 0;
-    let file_name = path.split("/").last().unwrap();
 
-    for line in contents.lines() {
+    for line in fs::read_to_string(path)?.lines() {
         line_number += 1;
         if line.contains("TODO") {
             let (_, comment) = line.split_once("TODO").unwrap();
             let cleaned_comment = comment.replace(":", "").trim().to_owned();
+
             todos.push(Todo::new(cleaned_comment, file_name.to_owned(), line_number))
         }
     }
@@ -99,12 +108,12 @@ fn get_todos(path: &str, todos: &mut Vec<Todo>) -> Result<(), std::io::Error> {
 
 struct Todo {
     comment: String,
-    file_name: String,
+    file_name: OsString,
     line_number: u32
 }
 
 impl Todo {
-    fn new(comment: String, file_name: String, line_number: u32) -> Todo {
+    fn new(comment: String, file_name: OsString, line_number: u32) -> Todo {
         Todo {
             comment: comment,
             file_name: file_name,