use anyhow::{Context, Result};
use std::{env, fs, path::PathBuf};

fn main() -> Result<()> {
    let path = env::args_os()
        .nth(1)
        .map(PathBuf::from)
        .unwrap_or_else(|| PathBuf::from("Cargo.toml"));

    let contents = fs::read_to_string(&path)
        .with_context(|| format!("failed to read {}", path.display()))?;

    println!("loaded {} bytes from {}", contents.len(), path.display());
    Ok(())
}