Function ddmw_client::conf::load

pub fn load(fname: Option<&Path>) -> Result<Option<Figment>, Error>

Load a DDMW application configuration file.

Attempt to load a configuration file in the following order:

1. If fname has Some value, its value will be used. Otherwise:
2. If the environment variable DDMW_APPCONF is set, its value will be used. Otherwise:
3. The filename ddmwapp.toml, in the current working directory, will be used.

If none of these could be be found, Ok(None) will be returned.

Example

Attempt to load a “hello.toml”, and return a default Config buffer if unsuccessful.

use std::path::Path;
use ddmw_client::conf::{Config, load};
use ddmw_client::Error;
fn get_conf() -> Result<Config, Error> {
  let fname = Path::new("hello.toml");
  let fig = load(Some(&fname))?.expect("Load failed");
  let conf = fig.extract::<Config>()?;
  Ok(conf)
}