Add command line entry point

amanuensis/config.py

@@ -1,3 +1,4 @@
+from argparse import ArgumentParser
 from typing import Optional
 import os
 
@@ -9,8 +10,8 @@ class AmanuensisConfig:
     # config values defined on the config object itself.
     CONFIG_FILE: Optional[str] = None
     STATIC_ROOT: Optional[str] = "static"
-    SECRET_KEY: Optional[str] = None
-    DATABASE_URI: Optional[str] = None
+    SECRET_KEY: Optional[str] = "secret"
+    DATABASE_URI: Optional[str] = "sqlite:///:memory:"
     TESTING: bool = False
 
 
@@ -24,3 +25,21 @@ class EnvironmentConfig(AmanuensisConfig):
         "AMANUENSIS_DATABASE_URI", AmanuensisConfig.DATABASE_URI
     )
     TESTING = os.environ.get("AMANUENSIS_TESTING", "").lower() in ("true", "1")
+
+
+class CommandLineConfig(AmanuensisConfig):
+    """Loads config values from command line arguments."""
+    def __init__(self) -> None:
+        parser = ArgumentParser()
+        parser.add_argument("--config-file", default=AmanuensisConfig.CONFIG_FILE)
+        parser.add_argument("--static-root", default=AmanuensisConfig.STATIC_ROOT)
+        parser.add_argument("--secret-key", default=AmanuensisConfig.SECRET_KEY)
+        parser.add_argument("--database-uri", default=AmanuensisConfig.DATABASE_URI)
+        parser.add_argument("--debug", action="store_true")
+        args = parser.parse_args()
+
+        self.CONFIG_FILE = args.config_file
+        self.STATIC_ROOT = args.static_root
+        self.SECRET_KEY = args.secret_key
+        self.DATABASE_URI = args.database_uri
+        self.TESTING = args.debug

amanuensis/server/__init__.py

@@ -2,7 +2,7 @@ import json
 
 from flask import Flask, g
 
-from amanuensis.config import AmanuensisConfig
+from amanuensis.config import AmanuensisConfig, CommandLineConfig
 from amanuensis.db import DbContext
 
 
@@ -54,3 +54,9 @@ def get_app(
     app.route("/")(test)
 
     return app
+
+
+def run():
+    """Run the server, populating the config from the command line."""
+    config = CommandLineConfig()
+    get_app(config).run(debug=config.TESTING)

pyproject.toml

@@ -16,6 +16,9 @@ pytest = "^5.2"
 black = "^21.5b2"
 mypy = "^0.812"
 
+[tool.poetry.scripts]
+amanuensis-server = "amanuensis.server:run"
+
 [tool.black]
 extend-exclude = "^/amanuensis/cli/.*|^/amanuensis/config/.*|^/amanuensis/lexicon/.*|^/amanuensis/log/.*|^/amanuensis/models/.*|^/amanuensis/resources/.*|^/amanuensis/server/.*|^/amanuensis/user/.*|^/amanuensis/__main__.py"