deleted

src/walk.rs

@@ -1,91 +0,0 @@
-use rayon::prelude::*;
-
-use std::sync::mpsc::{Sender, channel};
-use std::fs::{read_dir, DirEntry};
-use std::io::Error;
-use std::path::PathBuf;
-use std::process::ExitCode;
-
-use crate::Args;
-use crate::directory::Directory;
-
-pub fn walk<'a>(args: Args) -> Result<Directory, ExitCode> {
-    let (tx, rx) = channel();
-
-    let mut total = 0;
-    for entry in read_dir(&args.path).unwrap() {
-        let entry = match entry {
-            Ok(e) => e,
-            Err(e) => {
-                if !args.minimal {
-                    eprintln!("unable to open {}: {e}", args.path);
-                }
-                if args.persistant {
-                    continue;
-                } else {
-                    return Err(ExitCode::FAILURE);
-                }
-            },
-        };
-
-        total += match total_entry(entry, &args, &tx) {
-            Ok(t) => t,
-            Err((path, error)) => {
-                if !args.minimal {
-                    eprintln!("error opening {}: {error}", path.display());
-                }
-                if args.persistant {
-                    continue;
-                } else {
-                    return Err(ExitCode::FAILURE);
-                }
-            },
-        };    
-    }
-    // drop this to close the channel, so that into_iter() can end
-    drop(tx);
-
-    let mut fs = Directory::make(args.path, total);
-    fs.extend(rx);
-
-    Ok(fs)
-}
-
-fn total_entry(entry: DirEntry, args: &Args, printer: &Sender<(PathBuf, u64)>) -> Result<u64, (PathBuf, Error)> {
-    let path = entry.path();
-
-    match path.read_dir() {
-        Ok(dir) => {
-            let result = dir.par_bridge()
-            .filter_map(Result::ok)
-            .map(|entry| total_entry(entry, args, printer))
-            .reduce(|| Ok(0), reduce_once);
-
-            if let Ok(size) = result {
-                if !args.minimal && !args.total_only {
-                    let _ = printer.send((path, size));
-                }
-            }
-
-            return result;
-        },
-        Err(_) if path.is_file() => {
-            let size = unsafe { path.metadata().unwrap_unchecked() }.len();
-            if !args.minimal && !args.total_only {
-                let _ = printer.send((path, size));
-            }
-            return Ok(size);
-        },
-        Err(e) => Err((path, e)),
-    }
-}
-
-fn reduce_once<E>(accum: Result<u64, E>, this: Result<u64, E>) -> Result<u64, E> {
-    // reduction function for total_entry():
-    // short-circuit Errs, propagate Oks
-    // generic bc I'm lazy
-    match (accum, this) {
-        (Ok(n1), Ok(n2)) => Ok(n1 + n2),
-        (Err(e), _) | (_, Err(e)) => Err(e),
-    }
-}