feat: Abort immedietly when ^C is received. (#478)

Previously, we attempted to perform a clean shutdown, which could take a
significant period of time on slow filesystems. This commit changes the
shutdown logic to abort immedietly when ^C is received by the program.

src/dir_walker.rs

@@ -206,10 +206,6 @@ fn walk(dir: PathBuf, walk_data: &WalkData, depth: usize) -> Option<Node> {
     let prog_data = &walk_data.progress_data;
     let errors = &walk_data.errors;
 
-    if errors.lock().unwrap().abort {
-        return None;
-    }
-
     let children = if dir.is_dir() {
         let read_dir = fs::read_dir(&dir);
         match read_dir {

src/main.rs

@@ -26,8 +26,6 @@ use std::panic;
 use std::process;
 use std::sync::Arc;
 use std::sync::Mutex;
-use std::sync::atomic::AtomicBool;
-use std::sync::atomic::Ordering;
 use sysinfo::{System, SystemExt};
 use utils::canonicalize_absolute_path;
 
@@ -119,20 +117,13 @@ fn main() {
     let errors = RuntimeErrors::default();
     let error_listen_for_ctrlc = Arc::new(Mutex::new(errors));
     let errors_for_rayon = error_listen_for_ctrlc.clone();
-    let errors_final = error_listen_for_ctrlc.clone();
-    let is_in_listing = Arc::new(AtomicBool::new(false));
-    let cloned_is_in_listing = Arc::clone(&is_in_listing);
 
     ctrlc::set_handler(move || {
-        error_listen_for_ctrlc.lock().unwrap().abort = true;
         println!("\nAborting");
-        if cloned_is_in_listing.load(Ordering::Relaxed) {
+        process::exit(1);
-            process::exit(1);
-        }
     })
     .expect("Error setting Ctrl-C handler");
 
-    is_in_listing.store(true, Ordering::Relaxed);
     let target_dirs = match config.get_files_from(&options) {
         Some(path) => {
             if path == "-" {
@@ -162,7 +153,6 @@ fn main() {
             None => vec![".".to_owned()],
         },
     };
-    is_in_listing.store(false, Ordering::Relaxed);
 
     let summarize_file_types = options.get_flag("types");
 
@@ -304,10 +294,6 @@ fn main() {
     // Must have stopped indicator before we print to stderr
     indicator.stop();
 
-    if errors_final.lock().unwrap().abort {
-        return;
-    }
-
     let final_errors = walk_data.errors.lock().unwrap();
     if !final_errors.file_not_found.is_empty() {
         let err = final_errors

src/progress.rs

@@ -79,7 +79,6 @@ pub struct RuntimeErrors {
     pub file_not_found: HashSet<String>,
     pub unknown_error: HashSet<String>,
     pub interrupted_error: i32,
-    pub abort: bool,
 }
 
 /* -------------------------------------------------------------------------- */