distro: fix type annotations to please mypy

distro/distro.py

@@ -1,3 +1,5 @@
+from typing import Optional
+
 from constants import ARCHES, BASE_DISTROS, REPOSITORIES, KUPFER_HTTPS, CHROOT_PATHS
 from generator import generate_pacman_conf_body
 from config import config
@@ -57,8 +59,7 @@ def get_kupfer_https(arch: str) -> Distro:
     return get_kupfer(arch, KUPFER_HTTPS)
 
 
-def get_kupfer_local(arch: str = None, in_chroot: bool = True) -> Distro:
-    if not arch:
-        arch = config.runtime['arch']
+def get_kupfer_local(arch: Optional[str] = None, in_chroot: bool = True) -> Distro:
+    arch = arch or config.runtime['arch']
     dir = CHROOT_PATHS['packages'] if in_chroot else config.get_path('packages')
     return get_kupfer(arch, f"file://{dir}/$arch/$repo")

distro/package.py

@@ -1,8 +1,11 @@
+from typing import Optional
+
+
 class PackageInfo:
     name: str
     version: str
     filename: str
-    resolved_url: str
+    resolved_url: Optional[str]
 
     def __init__(
         self,
@@ -19,6 +22,7 @@ class PackageInfo:
     def __repr__(self):
         return f'{self.name}@{self.version}'
 
+    @staticmethod
     def parse_desc(desc_str: str, resolved_url=None):
         """Parses a desc file, returning a PackageInfo"""