Example from README seems to ignore config

[vi]

Running the example from README creates empty config.ini file (I expected it to contain options I specified on command line or default options). Trying to set, for example, timeout from config.ini fails.

If I add explicit conf(section), it reading that field from file starts working, but created config file is still empty.

README should be extended and include multiple launchers and example config file.

[marioortizmanero]

Hi! Sorry for the late reply.

Running the example from README creates empty config.ini file (I expected it to contain options I specified on command line or default options). Trying to set, for example, timeout from config.ini fails.

Now that you mention it I'm not exactly sure why config.ini is created when it's initialized if it's going to be empty anyway. The intended usage, which does write a different config file, is with write_file. This is a modified version of the showcase.rs example, after which a full config file will be created:

    let app = clap::App::new("demo");
    let mut conf = Config::parse(app, "config.ini").unwrap();
    conf.optional_field = Some(String::from("hola"));
    conf.write_file("config.ini").unwrap();
    println!("Parsed config: {:#?}", conf);

Perhaps the file could be created only when write_file is used? Anyhow, if you have this config file before running the example:

[Defaults]
timeout = 1000

The value for timeout is indeed 1000.