feat: allow config in command decorator

changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+# Pending
+
+- Allow passing configuration(s) directly to `@app.command()`
+
 # v0.2.1 - 11-05-2023
 
 - Fix un-allowed kwargs: accepted signatures are `fn(paramA, paramB=..., ... **kwargs)`

confit/cli.py

@@ -1,5 +1,6 @@
 import inspect
 import sys
+import tempfile
 from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional, Type, Union
 
@@ -76,6 +77,7 @@ def command(  # noqa
         # Rich settings
         rich_help_panel: Union[str, None] = Default(None),
         registry: Any = None,
+        config: Optional[Union[Config, List[Config]]] = None,
     ) -> Callable[[CommandFunctionType], CommandFunctionType]:
         typer_command = super().command(
             name=name,
@@ -96,14 +98,35 @@ def command(  # noqa
             },
         )
 
+        initial_config = config
+
         def wrapper(fn):
             validated = validate_arguments(fn)
 
             @typer_command
             def command(ctx: Context, config: Optional[List[Path]] = None):
-                config_path = config
+                config_path = config or []
 
                 has_meta = _fn_has_meta(fn)
+
+                if initial_config is not None:
+                    initial_configs = (
+                        [initial_config]
+                        if isinstance(initial_config, Config)
+                        else initial_config
+                    )
+
+                    initial_config_path = []
+
+                    for c in initial_configs:
+                        temp_file = tempfile.NamedTemporaryFile(delete=False)
+                        temp_file.write(
+                            c.to_str().encode()
+                        )  # Write the string to the file
+                        temp_file.close()
+                        initial_config_path.append(Path(temp_file.name))
+                    config_path = initial_config_path + config_path
+
                 if config_path:
                     config, name_from_file = merge_from_disk(config_path)
                 else:

tests/test_cli.py

@@ -2,7 +2,7 @@
 
 from typer.testing import CliRunner
 
-from confit import Cli, Registry
+from confit import Cli, Config, Registry
 from confit.registry import RegistryCollection, set_default_registry
 
 runner = CliRunner()
@@ -94,6 +94,56 @@ def test_cli_merge(change_test_dir):
     assert "Other: 99" in result.stdout
 
 
+app_with_initial_config = Cli(pretty_exceptions_show_locals=False)
+initial_config = [
+    Config(
+        {
+            "modelA": {
+                "submodel": {
+                    "value": 1,
+                }
+            },
+            "script": {
+                "other": 4,
+            },
+        }
+    ),
+    Config(
+        {
+            "script": {
+                "other": 5,
+            },
+        }
+    ),
+]
+
+
+@app_with_initial_config.command(name="script", config=initial_config)
+def app_with_initial_config_function(
+    modelA: BigModel,
+    modelB: BigModel,
+    other: int,
+    seed: int,
+):
+    assert modelA.submodel is modelB.submodel
+    assert modelA.submodel.value == 12  # --config has precedent over initial_config
+    assert other == 5  # initial_config[-1] has precedent over initial_config[0]
+
+
+def test_cli_working_with_initial_config(change_test_dir):
+    result = runner.invoke(
+        app_with_initial_config,
+        [
+            "--config",
+            "config.cfg",
+            "--seed",
+            "42",
+        ],
+    )
+    print(result.exit_code)
+    assert result.exit_code == 0, result.stdout
+
+
 app_with_meta = Cli(pretty_exceptions_show_locals=False)