Sync settings and CLI arguments

Most CLI arguments can be now saved into the configuration profile JSON.
This also cleans up passing around some, but not all args, into various
classes and methods, instead of just passing all of settings.

itch_dl/config.py

@@ -2,6 +2,7 @@ import os
 import json
 import logging
 import platform
+import argparse
 from typing import Optional
 
 import requests
@@ -9,6 +10,18 @@ from pydantic import BaseModel
 
 from . import __version__
 
+OVERRIDABLE_SETTINGS = (
+    "api_key",
+    "user_agent",
+    "download_to",
+    "mirror_web",
+    "urls_only",
+    "parallel",
+    "filter_files_glob",
+    "filter_files_regex",
+    "verbose",
+)
+
 
 class Settings(BaseModel):
     """Available settings for itch-dl. Make sure all of them
@@ -17,9 +30,16 @@ class Settings(BaseModel):
     api_key: Optional[str] = None
     user_agent: str = f"python-requests/{requests.__version__} itch-dl/{__version__}"
 
+    download_to: Optional[str] = None
+    mirror_web: bool = False
+    urls_only: bool = False
+    parallel: int = 1
+
     filter_files_glob: Optional[str] = None
     filter_files_regex: Optional[str] = None
 
+    verbose: bool = False
+
 
 def create_and_get_config_path() -> str:
     """Returns the configuration directory in the appropriate
@@ -37,7 +57,7 @@ def create_and_get_config_path() -> str:
     return os.path.join(base_path, "itch-dl")
 
 
-def load_config(profile: Optional[str] = None) -> Settings:
+def load_config(args: argparse.Namespace, profile: Optional[str] = None) -> Settings:
     """Loads the configuration from the file system if it exists,
     the returns a Settings object."""
     config_path = create_and_get_config_path()
@@ -58,4 +78,13 @@ def load_config(profile: Optional[str] = None) -> Settings:
 
         config_data.update(profile_data)
 
-    return Settings(**config_data)
+    # All settings from the base file:
+    settings = Settings(**config_data)
+
+    # Apply overrides from CLI args:
+    for key in OVERRIDABLE_SETTINGS:
+        value = getattr(args, key)
+        if value:
+            setattr(settings, key, value)
+
+    return settings