-

extern crate failure;

use failure::Error;
use failure::Fail;
use failure::ResultExt;

fn logging() -> Result<(), Error> {
let log_level = env::var("LOG_LEVEL")
    .unwrap_or_else(|e| match e {
      VarError::NotPresent => "".to_owned(),
      s @ VarError::NotUnicode(_) => s.downcast::<VarError>().context("'LOG_LEVEL' not UTF-8
      compatible!")?
    });
}

fn main() {
    logging().unwrap();
    }