Updated some stuff trying to get package fetching working

main.py

@@ -1,5 +1,8 @@
 #! /bin/env python
 import sys
+from pathlib import Path
+import tarfile
+
 from db import get_package_meta, ensure_db
 from handoff import delegate_to_pacman
 from fetch import fetch_package
@@ -34,5 +37,19 @@ def install(pkgname: str):
     
     # Send to pacman with userman flags
 
+    if not _is_userman_pkg(pkg_path):
+        # Throw it to pacman
+        print(":: Not Implemeted")
+        sys.exit(1)
+
+def _is_userman_pkg(pkg_dir: Path, pkg_name: str) -> bool:
+    with tarfile.open(pkg_dir, "r") as pkg:
+        for member in pkg.getmembers():
+            parts = member.name.split("/")
+            if len(parts) != 3 or parts[4] != (pkg_name + ".userman"):
+                continue
+            return True
+    return False
+
 if __name__ == "__main__":
     main()