US01-02: Establish Application and Database Foundation (#47)

photo_pipeline/__main__.py

@@ -0,0 +1,35 @@
+"""Application management CLI: ``python -m photo_pipeline {serve,migrate}``."""
+
+from __future__ import annotations
+
+import argparse
+from typing import Sequence
+
+from photo_pipeline.config import Config
+from photo_pipeline.db import run_migrations
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(prog="photo_pipeline")
+    commands = parser.add_subparsers(dest="command", required=True)
+    commands.add_parser("serve", help="Run the API server")
+    commands.add_parser("migrate", help="Upgrade the database to the latest revision")
+    args = parser.parse_args(argv)
+
+    config = Config.from_env()
+    config.database_path.parent.mkdir(parents=True, exist_ok=True)
+
+    if args.command == "migrate":
+        run_migrations(config.database_url)
+        return 0
+
+    import uvicorn
+
+    from photo_pipeline.api.app import create_app
+
+    uvicorn.run(create_app(config), host=config.host, port=config.port)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())