add io::unzip

src/io.rs

@@ -0,0 +1,20 @@
+pub fn unzip(zip_path: &str, out_path: &str) {
+    let mut archive = zip::ZipArchive::new(fs::File::open(&temp_file).unwrap()).unwrap();
+    for i in 0..archive.len() {
+        let mut file = archive.by_index(i).unwrap();
+        let outpath = iw4x_path.join(file.name());
+
+        if (*file.name()).ends_with('/') {
+            fs::create_dir_all(&outpath).unwrap();
+        } else {
+            println!("Unpacking {}", file.name());
+            if let Some(p) = outpath.parent() {
+                if !p.exists() {
+                    fs::create_dir_all(p).unwrap();
+                }
+            }
+            let mut outfile = fs::File::create(&outpath).unwrap();
+            std::io::copy(&mut file, &mut outfile).unwrap();
+        }
+    }
+}