initial commit

jpacrepo_uploader/config.py

@@ -0,0 +1,56 @@
+from configparser import RawConfigParser
+from os import environ
+from .maybe import Maybe
+from pathlib import Path
+from itertools import chain
+from dataclasses import dataclass
+from typing import Optional
+
+_config_file_name = 'client.properties'
+
+
+@dataclass
+class Config:
+    server_url: str
+    auth_server_url: str
+    repo_folders: tuple[Path, ...]
+
+
+config_file_candidates = [
+    (Maybe.of(Path('/etc') / 'jpacrepo' / _config_file_name)
+     .filter(Path.exists)),
+    (Maybe.of_nullable(environ.get('XDG_CONFIG_HOME', None))
+     .map(Path)
+     .map(lambda xdg_config_home: xdg_config_home / 'jpacrepo' / _config_file_name)
+     .filter(Path.exists)),
+    (Maybe.of_nullable(environ['HOME'])
+     .map(Path)
+     .map(lambda home: home / '.config' / _config_file_name)
+     .filter(Path.exists))
+]
+
+
+def load_configuration() -> Config:
+    main_section = 'main'
+    server_url: Optional[str] = None
+    auth_server_url: Optional[str] = None
+    repo_folders: list[Path] = []
+    for config_file_maybe in config_file_candidates:
+        def process_configuration(config_file: Path) -> None:
+            nonlocal server_url
+            nonlocal auth_server_url
+            config = RawConfigParser()
+            with open(config_file, 'r') as lines:
+                config.read_file(chain((f'[{main_section}]',), lines))
+            (Maybe.of_nullable(config.get(main_section, 'RepoFolder', fallback=None))
+             .map(lambda v: v.format(**environ))
+             .map(Path)
+             .if_present(repo_folders.append))
+            server_url = config.get(main_section, 'ServerURL', fallback=server_url)
+            auth_server_url = config.get(main_section, 'AuthServerURL', fallback=auth_server_url)
+
+        config_file_maybe.if_present(process_configuration)
+    return Config(server_url or 'https://woggioni.net/jpacrepo/',
+                  auth_server_url or 'https://woggioni.net/auth/realms/woggioni.net',
+                  tuple(repo_folders) or (Path('/var/cache/pacman/pkg'),)
+                  )