dc-ock 0.1.2

A simple reverse polish notation desk calculator
Documentation 
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pub(super) mod util {
    use std::io::Write;

    /// `get_config` returns a config object of type HashMap<String, String>,
    /// containing the values of the config file.
    ///
    /// this is an internal function, and should not be used outside of this crate.
    pub fn get_config() -> std::collections::HashMap<String, String> {
        let binding = directories::ProjectDirs::from("com", "lc332", "dc_rs").unwrap();
        let config_file = format!(
            "{}{}",
            binding.config_dir().to_str().unwrap_or("."),
            "/dc_rs.toml"
        );

        // Create the config directory & file if they don't exist already.
        let _ = std::fs::create_dir_all(binding.config_dir());
        let file = std::fs::OpenOptions::new()
            .write(true)
            .create_new(true)
            .open(&config_file);

        // If the file WAS created, then we need to write the default config to it.
        if file.is_ok() {
            writeln!(file.as_ref().unwrap(), "prompt = \">>> \"").unwrap();
            std::mem::drop(file);
        } else {
            std::mem::drop(file)
        }

        // Finally, create the config object and return a hashmap of it.
        let config = config::Config::builder()
            .add_source(config::File::with_name(&config_file))
            .add_source(config::Environment::with_prefix("DC_CONF"))
            .build()
            .unwrap();

        config
            .try_deserialize::<std::collections::HashMap<String, String>>()
            .unwrap()
    }
}