error: called `unwrap` on `response` after checking its variant with `is_some`
  --> src/web.rs:40:12
   |
39 |   if response.is_some() {
   |   --------------------- help: try: `if let Some(..) = response`
40 |     return response.unwrap().status().as_str() == "200";
   |            ^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
   = note: `-D clippy::unnecessary-unwrap` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::unnecessary_unwrap)]`

error: current MSRV (Minimum Supported Rust Version) is `1.57.0` but this item is stable since `1.58.0`
   --> src/system_helpers.rs:697:18
    |
697 |   while java_bin.is_symlink() {
    |                  ^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#incompatible_msrv

error: current MSRV (Minimum Supported Rust Version) is `1.57.0` but this item is stable since `1.58.0`
   --> src/system_helpers.rs:677:18
    |
677 |   while java_bin.is_symlink() {
    |                  ^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#incompatible_msrv
    = note: `-D clippy::incompatible-msrv` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::incompatible_msrv)]`

error: method `in_terminal_noclose` is never used
  --> src/system_helpers.rs:69:6
   |
67 | trait InTerminalEmulator {
   |       ------------------ method in this trait
68 |   fn in_terminal(&self) -> Self;
69 |   fn in_terminal_noclose(&self) -> Self;
   |      ^^^^^^^^^^^^^^^^^^^

error: method `as_root` is never used
  --> src/system_helpers.rs:48:6
   |
47 | pub trait AsRoot {
   |           ------ method in this trait
48 |   fn as_root(&self) -> Self;
   |      ^^^^^^^
   |
   = note: `-D dead-code` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(dead_code)]`