add logging overriding

src/fastapi_cli/cli.py

@@ -7,6 +7,7 @@
 from rich.padding import Padding
 from rich.panel import Panel
 from typing_extensions import Annotated
+from uvicorn.config import LOGGING_CONFIG
 
 from fastapi_cli.discover import get_import_string
 from fastapi_cli.exceptions import FastAPICLIException
@@ -60,6 +61,7 @@ def _run(
     command: str,
     app: Union[str, None] = None,
     proxy_headers: bool = False,
+    log_config: Union[Path, None] = None,
 ) -> None:
     try:
         use_uvicorn_app = get_import_string(path=path, app_name=app)
@@ -89,6 +91,7 @@ def _run(
         raise FastAPICLIException(
             "Could not import Uvicorn, try running 'pip install uvicorn'"
         ) from None
+
     uvicorn.run(
         app=use_uvicorn_app,
         host=host,
@@ -97,6 +100,8 @@ def _run(
         workers=workers,
         root_path=root_path,
         proxy_headers=proxy_headers,
+        # fallback to default uvicorn log config if nothing is provided
+        log_config=LOGGING_CONFIG if not log_config else str(log_config),
     )
 
 
@@ -145,6 +150,12 @@ def dev(
             help="Enable/Disable X-Forwarded-Proto, X-Forwarded-For, X-Forwarded-Port to populate remote address info."
         ),
     ] = True,
+    log_config: Annotated[
+        Union[Path, None],
+        typer.Option(
+            help="Logging configuration file. Supported formats: .ini, .json, .yaml. be tried."
+        ),
+    ] = None,
 ) -> Any:
     """
     Run a [bold]FastAPI[/bold] app in [yellow]development[/yellow] mode. 🧪
@@ -180,6 +191,7 @@ def dev(
         app=app,
         command="dev",
         proxy_headers=proxy_headers,
+        log_config=log_config,
     )
 
 
@@ -234,6 +246,12 @@ def run(
             help="Enable/Disable X-Forwarded-Proto, X-Forwarded-For, X-Forwarded-Port to populate remote address info."
         ),
     ] = True,
+    log_config: Annotated[
+        Union[Path, None],
+        typer.Option(
+            help="Logging configuration file. Supported formats: .ini, .json, .yaml."
+        ),
+    ] = None,
 ) -> Any:
     """
     Run a [bold]FastAPI[/bold] app in [green]production[/green] mode. 🚀
@@ -270,6 +288,7 @@ def run(
         app=app,
         command="run",
         proxy_headers=proxy_headers,
+        log_config=log_config,
     )
 
 

tests/assets/log_config.yaml

@@ -0,0 +1,34 @@
+version: 1
+disable_existing_loggers: False
+formatters:
+  default:
+    # "()": uvicorn.logging.DefaultFormatter
+    format: '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+  access:
+    # "()": uvicorn.logging.AccessFormatter
+    format: '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+handlers:
+  default:
+    formatter: default
+    class: logging.StreamHandler
+    stream: ext://sys.stderr
+  access:
+    formatter: access
+    class: logging.StreamHandler
+    stream: ext://sys.stdout
+loggers:
+  uvicorn.error:
+    level: DEBUG
+    handlers:
+      - default
+    propagate: no
+  uvicorn.access:
+    level: DEBUG
+    handlers:
+      - access
+    propagate: no
+root:
+  level: INFO
+  handlers:
+    - default
+  propagate: no

tests/test_cli.py

@@ -6,6 +6,7 @@
 import uvicorn
 from fastapi_cli.cli import app
 from typer.testing import CliRunner
+from uvicorn.config import LOGGING_CONFIG
 
 from tests.utils import changing_dir
 
@@ -29,6 +30,7 @@ def test_dev() -> None:
                 "workers": None,
                 "root_path": "",
                 "proxy_headers": True,
+                "log_config": LOGGING_CONFIG,
             }
         assert "Using import string single_file_app:app" in result.output
         assert (
@@ -58,6 +60,8 @@ def test_dev_args() -> None:
                     "--app",
                     "api",
                     "--no-proxy-headers",
+                    "--log-config",
+                    "log_config.yaml",
                 ],
             )
             assert result.exit_code == 0, result.output
@@ -71,6 +75,7 @@ def test_dev_args() -> None:
                 "workers": None,
                 "root_path": "/api",
                 "proxy_headers": False,
+                "log_config": "log_config.yaml",
             }
         assert "Using import string single_file_app:api" in result.output
         assert (
@@ -97,6 +102,7 @@ def test_run() -> None:
                 "workers": None,
                 "root_path": "",
                 "proxy_headers": True,
+                "log_config": LOGGING_CONFIG,
             }
         assert "Using import string single_file_app:app" in result.output
         assert (
@@ -128,6 +134,8 @@ def test_run_args() -> None:
                     "--app",
                     "api",
                     "--no-proxy-headers",
+                    "--log-config",
+                    "log_config.yaml",
                 ],
             )
             assert result.exit_code == 0, result.output
@@ -141,6 +149,7 @@ def test_run_args() -> None:
                 "workers": 2,
                 "root_path": "/api",
                 "proxy_headers": False,
+                "log_config": "log_config.yaml",
             }
         assert "Using import string single_file_app:api" in result.output
         assert (
@@ -178,6 +187,10 @@ def test_dev_help() -> None:
     assert "The root path is used to tell your app" in result.output
     assert "The name of the variable that contains the FastAPI app" in result.output
     assert "Use multiple worker processes." not in result.output
+    assert (
+        "Logging configuration file. Supported formats: .ini, .json, .yaml."
+        in result.output
+    )
 
 
 def test_run_help() -> None:
@@ -199,6 +212,10 @@ def test_run_help() -> None:
     assert "The root path is used to tell your app" in result.output
     assert "The name of the variable that contains the FastAPI app" in result.output
     assert "Use multiple worker processes." in result.output
+    assert (
+        "Logging configuration file. Supported formats: .ini, .json, .yaml."
+        in result.output
+    )
 
 
 def test_callback_help() -> None: