warning: matching over `()` is more explicit
  --> src/util.rs:18:16
   |
18 |             Ok(_) => Ok(()),
   |                ^ help: use `()` instead of `_`: `()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ignored_unit_patterns
note: the lint level is defined here
  --> src/main.rs:2:9
   |
2  | #![warn(clippy::pedantic, clippy::cargo)] 
   |         ^^^^^^^^^^^^^^^^
   = note: `#[warn(clippy::ignored_unit_patterns)]` implied by `#[warn(clippy::pedantic)]`

warning: redundant guard
   --> src/directory.rs:245:24
    |
245 |             Some(e) if e == "metadata" => (),
    |                        ^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_guards
    = note: `#[warn(clippy::redundant_guards)]` on by default
help: try
    |
245 -             Some(e) if e == "metadata" => (),
245 +             Some("metadata") => (),
    |