feat: misc improvements

src/args/mod.rs

@@ -1,6 +1,6 @@
 use clap::Parser;
 
-#[derive(Parser)]
+#[derive(Debug, Parser)]
 #[command(version)]
 pub struct Args {
     /// User Agent to use for requests
@@ -17,4 +17,13 @@ pub struct Args {
     /// Async jobs to use for fetching
     #[arg(short, long, default_value = "4")]
     pub jobs: usize,
+
+    /// Delay for rate-limits (ms)
+    #[arg(short, long, default_value = "1000", value_parser = parse_duration)]
+    pub delay: std::time::Duration,
+}
+
+fn parse_duration(arg: &str) -> Result<std::time::Duration, std::num::ParseIntError> {
+    let seconds = arg.parse()?;
+    Ok(std::time::Duration::from_millis(seconds))
 }