Show creation and modification times for files in a directory

main.rs

use anyhow::Result;
use chrono::{DateTime, Local};
use std::collections::VecDeque;
use std::fs::{metadata, read_dir};
use std::iter::once;
use std::path::{Path, PathBuf};
use std::time::SystemTime;

fn main() -> Result<()> {
    let mut queue =
        once(PathBuf::from("/path/to/directory")).collect::<VecDeque<_>>();
    while let Some(d) = queue.pop_front() {
        for entry in read_dir(d)? {
            let entry = entry?;
            let file_type = entry.file_type()?;
            if file_type.is_dir() {
                queue.push_back(entry.path());
            } else if file_type.is_file() {
                process_file(&entry.path())?;
            }
        }
    }
    Ok(())
}

fn process_file(path: &Path) -> Result<()> {
    macro_rules! into_date_time {
        ($system_time:expr) => {
            <SystemTime as Into<DateTime<Local>>>::into($system_time)
        };
    }
    let meta = metadata(path)?;
    println!(
        "{:?} {:?} {:?}",
        path,
        into_date_time!(meta.created()?),
        into_date_time!(meta.modified()?),
    );
    Ok(())
}