bump to 0.6.4 release

* add existing path subclass for env checks

* use the power of dataclasses

* use metaclass

* fake the class name

* use annotated

* use flag instead of dict

* dang it darglint

* cleanups

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "reflex"
-version = "0.6.4dev1"
+version = "0.6.4"
 description = "Web apps in pure Python."
 license = "Apache-2.0"
 authors = [
@@ -104,4 +104,4 @@ lint.pydocstyle.convention = "google"
 
 [tool.pytest.ini_options]
 asyncio_default_fixture_loop_scope = "function"
-asyncio_mode = "auto"
+asyncio_mode = "auto"

reflex/components/component.py

@@ -645,7 +645,7 @@ class Component(BaseComponent, ABC):
         # Look for component specific triggers,
         # e.g. variable declared as EventHandler types.
         for field in self.get_fields().values():
-            if types._issubclass(field.type_, EventHandler):
+            if types._issubclass(field.outer_type_, EventHandler):
                 args_spec = None
                 annotation = field.annotation
                 if (metadata := getattr(annotation, "__metadata__", None)) is not None:

reflex/config.py

@@ -3,14 +3,16 @@
 from __future__ import annotations
 
 import dataclasses
+import enum
 import importlib
+import inspect
 import os
 import sys
 import urllib.parse
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Set
 
-from typing_extensions import get_type_hints
+from typing_extensions import Annotated, get_type_hints
 
 from reflex.utils.exceptions import ConfigError, EnvironmentVarValueError
 from reflex.utils.types import GenericType, is_union, value_inside_optional
@@ -202,8 +204,8 @@ def interpret_int_env(value: str, field_name: str) -> int:
         ) from ve
 
 
-def interpret_path_env(value: str, field_name: str) -> Path:
+def interpret_existing_path_env(value: str, field_name: str) -> ExistingPath:
-    """Interpret a path environment variable value.
+    """Interpret a path environment variable value as an existing path.
 
     Args:
         value: The environment variable value.
@@ -221,6 +223,41 @@ def interpret_path_env(value: str, field_name: str) -> Path:
     return path
 
 
+def interpret_path_env(value: str, field_name: str) -> Path:
+    """Interpret a path environment variable value.
+
+    Args:
+        value: The environment variable value.
+        field_name: The field name.
+
+    Returns:
+        The interpreted value.
+    """
+    return Path(value)
+
+
+def interpret_enum_env(value: str, field_type: GenericType, field_name: str) -> Any:
+    """Interpret an enum environment variable value.
+
+    Args:
+        value: The environment variable value.
+        field_type: The field type.
+        field_name: The field name.
+
+    Returns:
+        The interpreted value.
+
+    Raises:
+        EnvironmentVarValueError: If the value is invalid.
+    """
+    try:
+        return field_type(value)
+    except ValueError as ve:
+        raise EnvironmentVarValueError(
+            f"Invalid enum value: {value} for {field_name}"
+        ) from ve
+
+
 def interpret_env_var_value(
     value: str, field_type: GenericType, field_name: str
 ) -> Any:
@@ -252,6 +289,10 @@ def interpret_env_var_value(
         return interpret_int_env(value, field_name)
     elif field_type is Path:
         return interpret_path_env(value, field_name)
+    elif field_type is ExistingPath:
+        return interpret_existing_path_env(value, field_name)
+    elif inspect.isclass(field_type) and issubclass(field_type, enum.Enum):
+        return interpret_enum_env(value, field_type, field_name)
 
     else:
         raise ValueError(
@@ -259,6 +300,13 @@ def interpret_env_var_value(
         )
 
 
+class PathExistsFlag:
+    """Flag to indicate that a path must exist."""
+
+
+ExistingPath = Annotated[Path, PathExistsFlag]
+
+
 @dataclasses.dataclass(init=False)
 class EnvironmentVariables:
     """Environment variables class to instantiate environment variables."""
@@ -288,7 +336,7 @@ class EnvironmentVariables:
     REFLEX_WEB_WORKDIR: Path = Path(constants.Dirs.WEB)
 
     # Path to the alembic config file
-    ALEMBIC_CONFIG: Path = Path(constants.ALEMBIC_CONFIG)
+    ALEMBIC_CONFIG: ExistingPath = Path(constants.ALEMBIC_CONFIG)
 
     # Disable SSL verification for HTTPX requests.
     SSL_NO_VERIFY: bool = False
@@ -401,7 +449,7 @@ class Config(Base):
     telemetry_enabled: bool = True
 
     # The bun path
-    bun_path: Path = constants.Bun.DEFAULT_PATH
+    bun_path: ExistingPath = constants.Bun.DEFAULT_PATH
 
     # List of origins that are allowed to connect to the backend API.
     cors_allowed_origins: List[str] = ["*"]
@@ -525,7 +573,7 @@ class Config(Base):
                     )
 
                 # Interpret the value.
-                value = interpret_env_var_value(env_var, field.type_, field.name)
+                value = interpret_env_var_value(env_var, field.outer_type_, field.name)
 
                 # Set the value.
                 updated_values[key] = value

reflex/event.py

@@ -1489,6 +1489,11 @@ if sys.version_info >= (3, 10):
             """
             return self
 
+        @overload
+        def __call__(
+            self: EventCallback[Q, T],
+        ) -> EventCallback[Q, T]: ...
+
         @overload
         def __call__(
             self: EventCallback[Concatenate[V, Q], T], value: V | Var[V]

tests/units/test_config.py

@@ -7,8 +7,13 @@ import pytest
 
 import reflex as rx
 import reflex.config
-from reflex.config import environment
+from reflex.config import (
-from reflex.constants import Endpoint
+    environment,
+    interpret_boolean_env,
+    interpret_enum_env,
+    interpret_int_env,
+)
+from reflex.constants import Endpoint, Env
 
 
 def test_requires_app_name():
@@ -208,11 +213,11 @@ def test_replace_defaults(
         assert getattr(c, key) == value
 
 
-def reflex_dir_constant():
+def reflex_dir_constant() -> Path:
     return environment.REFLEX_DIR
 
 
-def test_reflex_dir_env_var(monkeypatch, tmp_path):
+def test_reflex_dir_env_var(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
     """Test that the REFLEX_DIR environment variable is used to set the Reflex.DIR constant.
 
     Args:
@@ -224,3 +229,16 @@ def test_reflex_dir_env_var(monkeypatch, tmp_path):
     mp_ctx = multiprocessing.get_context(method="spawn")
     with mp_ctx.Pool(processes=1) as pool:
         assert pool.apply(reflex_dir_constant) == tmp_path
+
+
+def test_interpret_enum_env() -> None:
+    assert interpret_enum_env(Env.PROD.value, Env, "REFLEX_ENV") == Env.PROD
+
+
+def test_interpret_int_env() -> None:
+    assert interpret_int_env("3001", "FRONTEND_PORT") == 3001
+
+
+@pytest.mark.parametrize("value, expected", [("true", True), ("false", False)])
+def test_interpret_bool_env(value: str, expected: bool) -> None:
+    assert interpret_boolean_env(value, "TELEMETRY_ENABLED") == expected