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use std::{fs,env,path};
use std::error::Error;
use std::os::unix::fs::MetadataExt;
fn main() -> Result<(), Box<dyn Error>> {
let args: Vec<String> = env::args().collect();
let dir = match args.len() {
0 | 1 => path::Path::new("."),
_other => path::Path::new(&args[2]),
};
// header is basically a constant
print!("\x01");
println!("{}\x1D", ["file_name", "size", "mtime"].join("\x1E"));
println!("{}\x1D", ["string", "integer+bytes", "datetime"].join("\x1E"));
print!("\x02");
for entry in fs::read_dir(dir)? {
let entry = entry?;
let metadata = entry.metadata()?;
let filename: String = entry.file_name()
.into_string()
.or_else(|_| Err(format!("Invalid entry")))?;
let mtime = chrono::DateTime::<chrono::Utc>::from_utc(
chrono::NaiveDateTime::from_timestamp(metadata.mtime(), 0), chrono::Utc);
println!("{}\x1D",
[
filename,
metadata.size().to_string(),
mtime.to_rfc3339_opts(chrono::SecondsFormat::AutoSi, true),
].join("\x1E"));
}
Ok(())
}
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