mopidy.ext -- Extension API

If you want to learn how to make Mopidy extensions, read Extension development.

class mopidy.ext.Extension

Base class for Mopidy extensions

dist_name: str

The extension's distribution name, as registered on PyPI

Example: Mopidy-Soundspot

ext_name: str

The extension's short name, as used in setup.py and as config section name

Example: soundspot

classmethod get_cache_dir(config: Config) → Path

Get or create cache directory for the extension.

Use this directory to cache data that can safely be thrown away.

Parameters

config -- the Mopidy config object

Returns

pathlib.Path

get_command() → Optional[Command]

Command to expose to command line users running mopidy.

Returns

Instance of a Command class.

classmethod get_config_dir(config: Config) → Path

Get or create configuration directory for the extension.

Parameters

config -- the Mopidy config object

Returns

pathlib.Path

get_config_schema() → ConfigSchema

The extension's config validation schema

Returns

ConfigSchema

classmethod get_data_dir(config: Config) → Path

Get or create data directory for the extension.

Use this directory to store data that should be persistent.

Parameters

config -- the Mopidy config object

Returns

pathlib.Path

get_default_config() → str

The extension's default config as a text string.

Returns

str

setup(registry: mopidy.ext.Registry) → None

Register the extension's components in the extension Registry.

For example, to register a backend:

def setup(self, registry):
    from .backend import SoundspotBackend
    registry.add('backend', SoundspotBackend)

See Registry for a list of registry keys with a special meaning. Mopidy will instantiate and start any classes registered under the frontend and backend registry keys.

This method can also be used for other setup tasks not involving the extension registry.

Parameters

registry (Registry) -- the extension registry

validate_environment() → None

Checks if the extension can run in the current environment.

Dependencies described by setup.py are checked by Mopidy, so you should not check their presence here.

If a problem is found, raise ExtensionError with a message explaining the issue.

Raises

ExtensionError

Returns

None

version: str

The extension's version

Should match the __version__ attribute on the extension's main Python module and the version registered on PyPI.

class mopidy.ext.ExtensionData(extension, entry_point, config_schema, config_defaults, command)

command: Optional[Command]

Alias for field number 4

config_defaults: Any

Alias for field number 3

config_schema: ConfigSchema

Alias for field number 2

entry_point: Any

Alias for field number 1

extension: Extension

Alias for field number 0

class mopidy.ext.Registry

Registry of components provided by Mopidy extensions.

Passed to the setup() method of all extensions. The registry can be used like a dict of string keys and lists.

Some keys have a special meaning, including, but not limited to:

• backend is used for Mopidy backend classes.

• frontend is used for Mopidy frontend classes.

Extensions can use the registry for allow other to extend the extension itself. For example the Mopidy-Local historically used the local:library key to allow other extensions to register library providers for Mopidy-Local to use. Extensions should namespace custom keys with the extension's ext_name, e.g. local:foo or http:bar.

add(name: str, cls: Type[Any]) → None

Add a component to the registry.

Multiple classes can be registered to the same name.

mopidy.ext.load_extensions() → List[ExtensionData]

Find all installed extensions.

Returns

list of installed extensions

mopidy.ext.validate_extension_data(data: mopidy.ext.ExtensionData) → bool

Verify extension's dependencies and environment.

Parameters

extensions -- an extension to check

Returns

if extension should be run