refactor: various clippy lints

Signed-off-by: Christina Sørensen <christina@cafkafk.com>

crates/nix-weather/build.rs

@@ -27,7 +27,10 @@ fn main() -> Result<(), Error> {
   let mut cmd = build_cli();
   for &shell in Shell::value_variants() {
     // HACK: this is gross :(
-    let output = std::process::Command::new("mkdir").arg("man").output();
+    std::process::Command::new("mkdir")
+      .arg("man")
+      .output()
+      .expect("failed to make man directory");
 
     generate_to(shell, &mut cmd, "nix-weather", &outdir)?;
   }

crates/nix-weather/src/cli.rs

@@ -3,15 +3,11 @@
 //
 // SPDX-License-Identifier: EUPL-1.2
 
-use std::{cell::OnceCell, sync::OnceLock};
-
-use clap::{arg, command, crate_authors, value_parser, Arg, ArgAction, Command};
+use clap::{arg, command, crate_authors, value_parser, ArgAction, Command};
 
 const DEFAULT_CACHE: &str = "cache.nixos.org";
 
 pub fn build_cli() -> Command {
-  use std::path::PathBuf;
-
   command!()
     .author(crate_authors!("\n"))
     .arg(

crates/nix-weather/src/main.rs

@@ -3,7 +3,7 @@
 //
 // SPDX-License-Identifier: EUPL-1.2
 
-use std::time::{Duration, Instant};
+use std::time::Instant;
 use std::{env, io, net::SocketAddr};
 
 use dns_lookup::lookup_host;
@@ -11,8 +11,6 @@ use futures::future::join_all;
 use gethostname::gethostname;
 use itertools::Itertools;
 
-use log;
-
 use crate::nix::get_requisites;
 
 mod cli;
@@ -35,8 +33,8 @@ async fn main() -> io::Result<()> {
 
   let matches = cli::build_cli().get_matches();
 
-  /// If the users inputs more -v flags than we have log levels, send them a
-  /// message informing them.
+  // If the users inputs more -v flags than we have log levels, send them a
+  // message informing them.
   let mut very_bose = false;
 
   match matches

crates/nix-weather/src/net.rs

@@ -8,8 +8,6 @@ use std::time::Duration;
 use reqwest::Client;
 use tokio::time::sleep;
 
-use log;
-
 const MAX_SLIDE: u64 = 1000;
 
 pub async fn nar_exists(client: Client, domain: &str, hash: &str, slide: u64) -> usize {