Grass command line utility

grass.rs

use structopt::StructOpt;
use std::io::Error;

#[derive(Debug, StructOpt)]
struct Cli {
    pattern: String,
    #[structopt(parse(from_os_str))]
    path: std::path::PathBuf,
}

fn main() -> Result<(), Error> {
    let args = Cli::from_args();
    let content = std::fs::read_to_string(&args.path)?;

    for line in content.lines() {
        if line.contains(&args.pattern) {
            println!("{}", line);
        }
    }

    Ok(())
}