use structopt::StructOpt;
use failure::ResultExt;
use exitfailure::ExitFailure;

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

fn main() -> Result<(), ExitFailure>{
    let args = Cli::from_args();
    let content = std::fs::read_to_string(&args.path)
        .with_context(|_| format!("could not read file `{}`", args.path.display()))?;

    grrs_rk::find_matches(&content, &args.pattern, &mut std::io::stdout());
    Ok(())
}