Add tests and example for modpack support

theseus/examples/download-pack.rs

@@ -0,0 +1,53 @@
+use std::{path::PathBuf, time::Instant};
+
+use argh::FromArgs;
+use theseus::modpack::{fetch_modpack, manifest::ModpackSide};
+
+#[derive(FromArgs)]
+/// Simple modpack download
+struct ModpackDownloader {
+    /// where to download to
+    #[argh(positional)]
+    url: String,
+
+    /// where to put the resulting pack
+    #[argh(option, short = 'o')]
+    output: Option<PathBuf>,
+
+    /// the sha1 hash, if you want it checked
+    #[argh(option, short = 'c')]
+    hash: Option<String>,
+
+    /// use verbose logging
+    #[argh(switch, short = 'v')]
+    verbose: bool,
+}
+
+// Simple logging helper
+fn debug(msg: &str, verbose: bool) {
+    if verbose {
+        println!("{}", msg);
+    }
+}
+
+#[tokio::main]
+pub async fn main() {
+    let args = argh::from_env::<ModpackDownloader>();
+    let dest = args.output.unwrap_or(PathBuf::from("./pack-download/"));
+
+    debug(
+        &format!(
+            "Downloading pack {} to {}",
+            args.url,
+            dest.to_str().unwrap_or("?")
+        ),
+        args.verbose,
+    );
+
+    let start = Instant::now();
+    fetch_modpack(&args.url, args.hash.as_deref(), &dest, ModpackSide::Client).await;
+    let end = start.elapsed();
+
+    println!("Download completed in {} seconds", end.as_secs_f32());
+    debug("Done!", args.verbose);
+}