config_ninja.contrib

Backend implementations for third-party integrations.

Each backend is implemented as a subclass of config_ninja.backend.Backend in a module of this package. The get_backend() function is used to retrieve the backend class given its module name.

Available Backends

`config_ninja.contrib.appconfig`

Integrate with the AWS AppConfig service.

`config_ninja.contrib.local`

Use a local file as the backend.

View Source

 1"""Backend implementations for third-party integrations.
 2
 3Each backend is implemented as a subclass of `config_ninja.backend.Backend` in a module of this
 4package. The `get_backend()` function is used to retrieve the backend class given its module name.
 5
 6## Available Backends
 7
 8### `config_ninja.contrib.appconfig`
 9
10Integrate with the AWS AppConfig service.
11
12### `config_ninja.contrib.local`
13
14Use a local file as the backend.
15"""
16
17from __future__ import annotations
18
19import importlib
20
21from config_ninja.backend import Backend
22
23
24def get_backend(name: str) -> type[Backend]:
25    """Import the `config_ninja.backend.Backend` subclass for the given module name."""
26    module = importlib.import_module(f'config_ninja.contrib.{name}')
27    for val in module.__dict__.values():
28        try:
29            is_subclass = issubclass(val, Backend)
30        except TypeError:
31            continue
32
33        if is_subclass and val is not Backend:
34            return val  # type: ignore[no-any-return]  # is_subclass ensures the correct type
35
36    raise ValueError(f'No backend found for {name}')  # pragma: no cover

def get_backend(name: str) -> type[config_ninja.backend.Backend]: View Source

25def get_backend(name: str) -> type[Backend]:
26    """Import the `config_ninja.backend.Backend` subclass for the given module name."""
27    module = importlib.import_module(f'config_ninja.contrib.{name}')
28    for val in module.__dict__.values():
29        try:
30            is_subclass = issubclass(val, Backend)
31        except TypeError:
32            continue
33
34        if is_subclass and val is not Backend:
35            return val  # type: ignore[no-any-return]  # is_subclass ensures the correct type
36
37    raise ValueError(f'No backend found for {name}')  # pragma: no cover

Import the config_ninja.backend.Backend subclass for the given module name.