minigrep/src/lib.rs


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use std::error::Error;
use std::fs;

pub struct Config {
    pub query: String,
    pub filename: String,
}

impl Config {

    pub fn new(args: &[String]) -> Result<Config, &'static str> {

        if args.len() < 3 {
            return Err("Not enough arguments.");
        }

        let query = args[1].clone();
        let filename = args[2].clone();
        Ok(Config { query, filename })
    }

}

pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
    let contents = fs::read_to_string(config.filename)?;
    dbg!(contents);
    Ok(())
}