[WIP] Large refactor of the inspection plugin and models.

docs/source/_ext/add_dependencies.py

@@ -3,7 +3,6 @@ import os
 import re
 import sys
 import textwrap as tw
-from contextlib import contextmanager
 
 from sphinx.application import Sphinx
 
@@ -13,14 +12,15 @@ base_path = os.path.abspath(
 
 sys.path.insert(0, base_path)
 
-from platypush.utils import get_plugin_name_by_class  # noqa
-from platypush.utils.mock import mock  # noqa
-from platypush.utils.reflection import IntegrationMetadata, import_file  # noqa
+from platypush.common.reflection import Integration  # noqa
+from platypush.utils import get_plugin_name_by_class, import_file  # noqa
+from platypush.utils.mock import auto_mocks  # noqa
+from platypush.utils.mock.modules import mock_imports  # noqa
 
 
 class IntegrationEnricher:
     @staticmethod
-    def add_events(source: list[str], manifest: IntegrationMetadata, idx: int) -> int:
+    def add_events(source: list[str], manifest: Integration, idx: int) -> int:
         if not manifest.events:
             return idx
 
@@ -37,7 +37,7 @@ class IntegrationEnricher:
         return idx + 1
 
     @staticmethod
-    def add_actions(source: list[str], manifest: IntegrationMetadata, idx: int) -> int:
+    def add_actions(source: list[str], manifest: Integration, idx: int) -> int:
         if not (manifest.actions and manifest.cls):
             return idx
 
@@ -60,7 +60,7 @@ class IntegrationEnricher:
 
     @classmethod
     def add_install_deps(
-        cls, source: list[str], manifest: IntegrationMetadata, idx: int
+        cls, source: list[str], manifest: Integration, idx: int
     ) -> int:
         deps = manifest.deps
         parsed_deps = {
@@ -106,9 +106,7 @@ class IntegrationEnricher:
         return idx
 
     @classmethod
-    def add_description(
-        cls, source: list[str], manifest: IntegrationMetadata, idx: int
-    ) -> int:
+    def add_description(cls, source: list[str], manifest: Integration, idx: int) -> int:
         docs = (
             doc
             for doc in (
@@ -127,7 +125,7 @@ class IntegrationEnricher:
 
     @classmethod
     def add_conf_snippet(
-        cls, source: list[str], manifest: IntegrationMetadata, idx: int
+        cls, source: list[str], manifest: Integration, idx: int
     ) -> int:
         source.insert(
             idx,
@@ -163,8 +161,8 @@ class IntegrationEnricher:
         if not os.path.isfile(manifest_file):
             return
 
-        with mock_imports():
-            manifest = IntegrationMetadata.from_manifest(manifest_file)
+        with auto_mocks():
+            manifest = Integration.from_manifest(manifest_file)
             idx = self.add_description(src, manifest, idx=3)
             idx = self.add_conf_snippet(src, manifest, idx=idx)
             idx = self.add_install_deps(src, manifest, idx=idx)
@@ -175,14 +173,6 @@ class IntegrationEnricher:
         source[0] = '\n'.join(src)
 
 
-@contextmanager
-def mock_imports():
-    conf_mod = import_file(os.path.join(base_path, 'docs', 'source', 'conf.py'))
-    mock_mods = getattr(conf_mod, 'autodoc_mock_imports', [])
-    with mock(*mock_mods):
-        yield
-
-
 def setup(app: Sphinx):
     app.connect('source-read', IntegrationEnricher())
     return {

docs/source/conf.py

@@ -163,9 +163,9 @@ latex_documents = [
 man_pages = [(master_doc, 'platypush', 'platypush Documentation', [author], 1)]
 
 
-# -- Options for Texinfo output ----------------------------------------------
+# -- Options for TexInfo output ----------------------------------------------
 
-# Grouping the document tree into Texinfo files. List of tuples
+# Grouping the document tree into TexInfo files. List of tuples
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
@@ -193,126 +193,25 @@ autodoc_default_options = {
     'show-inheritance': True,
 }
 
-autodoc_mock_imports = [
-    'gunicorn',
-    'googlesamples.assistant.grpc.audio_helpers',
-    'google.assistant.embedded',
-    'google.assistant.library',
-    'google.assistant.library.event',
-    'google.assistant.library.file_helpers',
-    'google.oauth2.credentials',
-    'oauth2client',
-    'apiclient',
-    'tenacity',
-    'smartcard',
-    'Leap',
-    'oauth2client',
-    'rtmidi',
-    'bluetooth',
-    'gevent.wsgi',
-    'Adafruit_IO',
-    'pyclip',
-    'pydbus',
-    'inputs',
-    'inotify',
-    'omxplayer',
-    'plexapi',
-    'cwiid',
-    'sounddevice',
-    'soundfile',
-    'numpy',
-    'cv2',
-    'nfc',
-    'ndef',
-    'bcrypt',
-    'google',
-    'feedparser',
-    'kafka',
-    'googlesamples',
-    'icalendar',
-    'httplib2',
-    'mpd',
-    'serial',
-    'pyHS100',
-    'grpc',
-    'envirophat',
-    'gps',
-    'picamera',
-    'pmw3901',
-    'PIL',
-    'croniter',
-    'pyaudio',
-    'avs',
-    'PyOBEX',
-    'PyOBEX.client',
-    'todoist',
-    'trello',
-    'telegram',
-    'telegram.ext',
-    'pyfirmata2',
-    'cups',
-    'graphyte',
-    'cpuinfo',
-    'psutil',
-    'openzwave',
-    'deepspeech',
-    'wave',
-    'pvporcupine ',
-    'pvcheetah',
-    'pyotp',
-    'linode_api4',
-    'pyzbar',
-    'tensorflow',
-    'keras',
-    'pandas',
-    'samsungtvws',
-    'paramiko',
-    'luma',
-    'zeroconf',
-    'dbus',
-    'gi',
-    'gi.repository',
-    'twilio',
-    'Adafruit_Python_DHT',
-    'RPi.GPIO',
-    'RPLCD',
-    'imapclient',
-    'pysmartthings',
-    'aiohttp',
-    'watchdog',
-    'pyngrok',
-    'irc',
-    'irc.bot',
-    'irc.strings',
-    'irc.client',
-    'irc.connection',
-    'irc.events',
-    'defusedxml',
-    'nio',
-    'aiofiles',
-    'aiofiles.os',
-    'async_lru',
-    'bleak',
-    'bluetooth_numbers',
-    'TheengsDecoder',
-    'simple_websocket',
-    'uvicorn',
-    'websockets',
-    'docutils',
-    'aioxmpp',
-]
-
 sys.path.insert(0, os.path.abspath('../..'))
 
+from platypush.utils.mock.modules import mock_imports  # noqa
 
-def skip(app, what, name, obj, skip, options):
+autodoc_mock_imports = [*mock_imports]
+
+
+# _ = app
+# __ = what
+# ___ = obj
+# ____ = options
+def _skip(_, __, name, ___, skip, ____):
     if name == "__init__":
         return False
     return skip
 
 
 def setup(app):
-    app.connect("autodoc-skip-member", skip)
+    app.connect("autodoc-skip-member", _skip)
 
 
 # vim:sw=4:ts=4:et:

platypush/cli.py

@@ -32,6 +32,14 @@ def parse_cmdline(args: Sequence[str]) -> argparse.Namespace:
         help='Custom working directory to be used for the application',
     )
 
+    parser.add_argument(
+        '--cachedir',
+        dest='cachedir',
+        required=False,
+        default=None,
+        help='Custom cache directory',
+    )
+
     parser.add_argument(
         '--device-id',
         '-d',

platypush/common/reflection/__init__.py

@@ -0,0 +1,6 @@
+from ._model import Integration
+
+
+__all__ = [
+    "Integration",
+]

platypush/common/reflection/_model/__init__.py

@@ -0,0 +1,14 @@
+from .action import Action
+from .argument import Argument
+from .constructor import Constructor
+from .integration import Integration
+from .returns import ReturnValue
+
+
+__all__ = [
+    "Action",
+    "Argument",
+    "Constructor",
+    "Integration",
+    "ReturnValue",
+]

platypush/common/reflection/_model/action.py

@@ -0,0 +1,7 @@
+from .._parser import DocstringParser
+
+
+class Action(DocstringParser):
+    """
+    Represents an integration action.
+    """

platypush/common/reflection/_model/argument.py

@@ -0,0 +1,27 @@
+from dataclasses import dataclass
+from typing import Optional, Type
+
+from .._serialize import Serializable
+from .._utils import type_str
+
+
+@dataclass
+class Argument(Serializable):
+    """
+    Represents an integration constructor/action parameter.
+    """
+
+    name: str
+    required: bool = False
+    doc: Optional[str] = None
+    type: Optional[Type] = None
+    default: Optional[str] = None
+
+    def to_dict(self) -> dict:
+        return {
+            "name": self.name,
+            "required": self.required,
+            "doc": self.doc,
+            "type": type_str(self.type),
+            "default": self.default,
+        }

platypush/common/reflection/_model/constructor.py

@@ -0,0 +1,23 @@
+from typing import Union, Type, Callable
+
+from .._parser import DocstringParser
+
+
+class Constructor(DocstringParser):
+    """
+    Represents an integration constructor.
+    """
+
+    @classmethod
+    def parse(cls, obj: Union[Type, Callable]) -> "Constructor":
+        """
+        Parse the parameters of a class constructor or action method.
+
+        :param obj: Base type of the object.
+        :return: The parsed parameters.
+        """
+        init = getattr(obj, "__init__", None)
+        if init and callable(init):
+            return super().parse(init)
+
+        return super().parse(obj)

platypush/common/reflection/_model/integration.py

@@ -4,49 +4,23 @@ import os
 import re
 import textwrap as tw
 from dataclasses import dataclass, field
-from importlib.machinery import SourceFileLoader
-from importlib.util import spec_from_loader, module_from_spec
-from typing import Optional, Type, Union, Callable, Dict, Set
+from typing import Type, Optional, Dict, Set
 
 from platypush.utils import (
     get_backend_class_by_name,
-    get_backend_name_by_class,
     get_plugin_class_by_name,
     get_plugin_name_by_class,
+    get_backend_name_by_class,
     get_decorators,
 )
 from platypush.utils.manifest import Manifest, ManifestType, Dependencies
-from platypush.utils.reflection._parser import DocstringParser, Parameter
 
-
-class Action(DocstringParser):
-    """
-    Represents an integration action.
-    """
-
-
-class Constructor(DocstringParser):
-    """
-    Represents an integration constructor.
-    """
-
-    @classmethod
-    def parse(cls, obj: Union[Type, Callable]) -> "Constructor":
-        """
-        Parse the parameters of a class constructor or action method.
-
-        :param obj: Base type of the object.
-        :return: The parsed parameters.
-        """
-        init = getattr(obj, "__init__", None)
-        if init and callable(init):
-            return super().parse(init)
-
-        return super().parse(obj)
+from .._serialize import Serializable
+from . import Constructor, Action, Argument
 
 
 @dataclass
-class IntegrationMetadata:
+class Integration(Serializable):
     """
     Represents the metadata of an integration (plugin or backend).
     """
@@ -65,8 +39,25 @@ class IntegrationMetadata:
         if not self._skip_manifest:
             self._init_manifest()
 
+    def to_dict(self) -> dict:
+        return {
+            "name": self.name,
+            "type": f'{self.type.__module__}.{self.type.__qualname__}',
+            "doc": self.doc,
+            "args": {
+                **(
+                    {name: arg.to_dict() for name, arg in self.constructor.args.items()}
+                    if self.constructor
+                    else {}
+                ),
+            },
+            "actions": {k: v.to_dict() for k, v in self.actions.items()},
+            "events": [f'{e.__module__}.{e.__qualname__}' for e in self.events],
+            "deps": self.deps.to_dict(),
+        }
+
     @staticmethod
-    def _merge_params(params: Dict[str, Parameter], new_params: Dict[str, Parameter]):
+    def _merge_params(params: Dict[str, Argument], new_params: Dict[str, Argument]):
         """
         Utility function to merge a new mapping of parameters into an existing one.
         """
@@ -104,7 +95,7 @@ class IntegrationMetadata:
                 actions[action_name].doc = action.doc
 
             # Merge the parameters
-            cls._merge_params(actions[action_name].params, action.params)
+            cls._merge_params(actions[action_name].args, action.args)
 
     @classmethod
     def _merge_events(cls, events: Set[Type], new_events: Set[Type]):
@@ -114,7 +105,7 @@ class IntegrationMetadata:
         events.update(new_events)
 
     @classmethod
-    def by_name(cls, name: str) -> "IntegrationMetadata":
+    def by_name(cls, name: str) -> "Integration":
         """
         :param name: Integration name.
         :return: A parsed Integration class given its type.
@@ -127,7 +118,7 @@ class IntegrationMetadata:
         return cls.by_type(type)
 
     @classmethod
-    def by_type(cls, type: Type, _skip_manifest: bool = False) -> "IntegrationMetadata":
+    def by_type(cls, type: Type, _skip_manifest: bool = False) -> "Integration":
         """
         :param type: Integration type (plugin or backend).
         :param _skip_manifest: Whether we should skip parsing the manifest file for this integration
@@ -167,7 +158,7 @@ class IntegrationMetadata:
                 p_obj = cls.by_type(p_type, _skip_manifest=True)
                 # Merge constructor parameters
                 if obj.constructor and p_obj.constructor:
-                    cls._merge_params(obj.constructor.params, p_obj.constructor.params)
+                    cls._merge_params(obj.constructor.args, p_obj.constructor.args)
 
                 # Merge actions
                 cls._merge_actions(obj.actions, p_obj.actions)
@@ -194,8 +185,24 @@ class IntegrationMetadata:
 
         return getter(".".join(self.manifest.package.split(".")[2:]))
 
+    @property
+    def base_type(self) -> Type:
+        """
+        :return: The base type of this integration, either :class:`platypush.backend.Backend` or
+            :class:`platypush.plugins.Plugin`.
+        """
+        from platypush.backend import Backend
+        from platypush.plugins import Plugin
+
+        if issubclass(self.cls, Plugin):
+            return Plugin
+        if issubclass(self.cls, Backend):
+            return Backend
+
+        raise RuntimeError(f"Unknown base type for {self.cls}")
+
     @classmethod
-    def from_manifest(cls, manifest_file: str) -> "IntegrationMetadata":
+    def from_manifest(cls, manifest_file: str) -> "Integration":
         """
         Create an `IntegrationMetadata` object from a manifest file.
 
@@ -302,27 +309,9 @@ class IntegrationMetadata:
                         else ""
                     )
                     + "\n"
-                    for name, param in self.constructor.params.items()
+                    for name, param in self.constructor.args.items()
                 )
-                if self.constructor and self.constructor.params
+                if self.constructor and self.constructor.args
                 else "    # No configuration required\n"
             )
         )
-
-
-def import_file(path: str, name: Optional[str] = None):
-    """
-    Import a Python file as a module, even if no __init__.py is
-    defined in the directory.
-
-    :param path: Path of the file to import.
-    :param name: Custom name for the imported module (default: same as the file's basename).
-    :return: The imported module.
-    """
-    name = name or re.split(r"\.py$", os.path.basename(path))[0]
-    loader = SourceFileLoader(name, os.path.expanduser(path))
-    mod_spec = spec_from_loader(name, loader)
-    assert mod_spec, f"Cannot create module specification for {path}"
-    mod = module_from_spec(mod_spec)
-    loader.exec_module(mod)
-    return mod

platypush/common/reflection/_model/returns.py

@@ -0,0 +1,21 @@
+from dataclasses import dataclass
+from typing import Optional, Type
+
+from .._serialize import Serializable
+from .._utils import type_str
+
+
+@dataclass
+class ReturnValue(Serializable):
+    """
+    Represents the return value of an action.
+    """
+
+    doc: Optional[str] = None
+    type: Optional[Type] = None
+
+    def to_dict(self) -> dict:
+        return {
+            "doc": self.doc,
+            "type": type_str(self.type),
+        }

platypush/common/reflection/_parser/__init__.py

@@ -0,0 +1,6 @@
+from .docstring import DocstringParser
+
+
+__all__ = [
+    "DocstringParser",
+]

platypush/common/reflection/_parser/context.py

@@ -0,0 +1,48 @@
+import inspect
+import textwrap as tw
+from dataclasses import dataclass, field
+from typing import Callable, Optional, Iterable, Tuple, Any, Type, get_type_hints
+
+from .._model.argument import Argument
+from .._model.returns import ReturnValue
+from .state import ParseState
+
+
+@dataclass
+class ParseContext:
+    """
+    Runtime parsing context.
+    """
+
+    obj: Callable
+    state: ParseState = ParseState.DOC
+    cur_param: Optional[str] = None
+    doc: Optional[str] = None
+    returns: ReturnValue = field(default_factory=ReturnValue)
+    parsed_params: dict[str, Argument] = field(default_factory=dict)
+
+    def __post_init__(self):
+        annotations = getattr(self.obj, "__annotations__", {})
+        if annotations:
+            self.returns.type = annotations.get("return")
+
+    @property
+    def spec(self) -> inspect.FullArgSpec:
+        return inspect.getfullargspec(self.obj)
+
+    @property
+    def param_names(self) -> Iterable[str]:
+        return self.spec.args[1:]
+
+    @property
+    def param_defaults(self) -> Tuple[Any]:
+        defaults = self.spec.defaults or ()
+        return ((Any,) * (len(self.spec.args[1:]) - len(defaults))) + defaults
+
+    @property
+    def param_types(self) -> dict[str, Type]:
+        return get_type_hints(self.obj)
+
+    @property
+    def doc_lines(self) -> Iterable[str]:
+        return tw.dedent(inspect.getdoc(self.obj) or "").split("\n")

platypush/common/reflection/_parser/docstring.py

@@ -1,97 +1,16 @@
-import inspect
 import re
 import textwrap as tw
 from contextlib import contextmanager
-from dataclasses import dataclass, field
-from enum import IntEnum
-from typing import (
-    Any,
-    Optional,
-    Iterable,
-    Type,
-    get_type_hints,
-    Callable,
-    Tuple,
-    Generator,
-    Dict,
-)
+from typing import Optional, Dict, Callable, Generator, Any
+
+from .._model.argument import Argument
+from .._model.returns import ReturnValue
+from .._serialize import Serializable
+from .context import ParseContext
+from .state import ParseState
 
 
-@dataclass
-class ReturnValue:
-    """
-    Represents the return value of an action.
-    """
-
-    doc: Optional[str] = None
-    type: Optional[Type] = None
-
-
-@dataclass
-class Parameter:
-    """
-    Represents an integration constructor/action parameter.
-    """
-
-    name: str
-    required: bool = False
-    doc: Optional[str] = None
-    type: Optional[Type] = None
-    default: Optional[str] = None
-
-
-class ParseState(IntEnum):
-    """
-    Parse state.
-    """
-
-    DOC = 0
-    PARAM = 1
-    TYPE = 2
-    RETURN = 3
-
-
-@dataclass
-class ParseContext:
-    """
-    Runtime parsing context.
-    """
-
-    obj: Callable
-    state: ParseState = ParseState.DOC
-    cur_param: Optional[str] = None
-    doc: Optional[str] = None
-    returns: ReturnValue = field(default_factory=ReturnValue)
-    parsed_params: dict[str, Parameter] = field(default_factory=dict)
-
-    def __post_init__(self):
-        annotations = getattr(self.obj, "__annotations__", {})
-        if annotations:
-            self.returns.type = annotations.get("return")
-
-    @property
-    def spec(self) -> inspect.FullArgSpec:
-        return inspect.getfullargspec(self.obj)
-
-    @property
-    def param_names(self) -> Iterable[str]:
-        return self.spec.args[1:]
-
-    @property
-    def param_defaults(self) -> Tuple[Any]:
-        defaults = self.spec.defaults or ()
-        return ((Any,) * (len(self.spec.args[1:]) - len(defaults))) + defaults
-
-    @property
-    def param_types(self) -> dict[str, Type]:
-        return get_type_hints(self.obj)
-
-    @property
-    def doc_lines(self) -> Iterable[str]:
-        return tw.dedent(inspect.getdoc(self.obj) or "").split("\n")
-
-
-class DocstringParser:
+class DocstringParser(Serializable):
     """
     Mixin for objects that can parse docstrings.
     """
@@ -105,25 +24,30 @@ class DocstringParser:
         self,
         name: str,
         doc: Optional[str] = None,
-        params: Optional[Dict[str, Parameter]] = None,
+        args: Optional[Dict[str, Argument]] = None,
+        has_varargs: bool = False,
+        has_kwargs: bool = False,
         returns: Optional[ReturnValue] = None,
     ):
         self.name = name
         self.doc = doc
-        self.params = params or {}
+        self.args = args or {}
+        self.has_varargs = has_varargs
+        self.has_kwargs = has_kwargs
         self.returns = returns
 
-    @classmethod
-    @contextmanager
-    def _parser(cls, obj: Callable) -> Generator[ParseContext, None, None]:
-        """
-        Manages the parsing context manager.
+    def to_dict(self) -> dict:
+        return {
+            "name": self.name,
+            "doc": self.doc,
+            "args": {k: v.to_dict() for k, v in self.args.items()},
+            "has_varargs": self.has_varargs,
+            "has_kwargs": self.has_kwargs,
+            "returns": self.returns.to_dict() if self.returns else None,
+        }
 
-        :param obj: Method to parse.
-        :return: The parsing context.
-        """
-
-        def norm_indent(text: Optional[str]) -> Optional[str]:
+    @staticmethod
+    def _norm_indent(text: Optional[str]) -> Optional[str]:
         """
         Normalize the indentation of a docstring.
 
@@ -136,15 +60,25 @@ class DocstringParser:
         lines = text.split("\n")
         return (lines[0] + "\n" + tw.dedent("\n".join(lines[1:]) or "")).strip()
 
+    @classmethod
+    @contextmanager
+    def _parser(cls, obj: Callable) -> Generator[ParseContext, None, None]:
+        """
+        Manages the parsing context manager.
+
+        :param obj: Method to parse.
+        :return: The parsing context.
+        """
+
         ctx = ParseContext(obj)
         yield ctx
 
         # Normalize the parameters docstring indentation
         for param in ctx.parsed_params.values():
-            param.doc = norm_indent(param.doc)
+            param.doc = cls._norm_indent(param.doc)
 
         # Normalize the return docstring indentation
-        ctx.returns.doc = norm_indent(ctx.returns.doc)
+        ctx.returns.doc = cls._norm_indent(ctx.returns.doc)
 
     @staticmethod
     def _is_continuation_line(line: str) -> bool:
@@ -189,7 +123,7 @@ class DocstringParser:
             if ctx.cur_param in {ctx.spec.varkw, ctx.spec.varargs}:
                 return
 
-            ctx.parsed_params[ctx.cur_param] = Parameter(
+            ctx.parsed_params[ctx.cur_param] = Argument(
                 name=ctx.cur_param,
                 required=(
                     idx >= len(ctx.param_defaults) or ctx.param_defaults[idx] is Any
@@ -236,6 +170,8 @@ class DocstringParser:
         return cls(
             name=obj.__name__,
             doc=ctx.doc,
-            params=ctx.parsed_params,
+            args=ctx.parsed_params,
+            has_varargs=ctx.spec.varargs is not None,
+            has_kwargs=ctx.spec.varkw is not None,
             returns=ctx.returns,
         )

platypush/common/reflection/_parser/state.py

@@ -0,0 +1,12 @@
+from enum import IntEnum
+
+
+class ParseState(IntEnum):
+    """
+    Parse state.
+    """
+
+    DOC = 0
+    PARAM = 1
+    TYPE = 2
+    RETURN = 3

platypush/common/reflection/_serialize.py

@@ -0,0 +1,14 @@
+from abc import ABC, abstractmethod
+
+
+class Serializable(ABC):
+    """
+    Base class for reflection entities that can be serialized to JSON/YAML.
+    """
+
+    @abstractmethod
+    def to_dict(self) -> dict:
+        """
+        Serialize the entity to a string.
+        """
+        raise NotImplementedError()

platypush/common/reflection/_utils.py

@@ -0,0 +1,12 @@
+import re
+from typing import Optional, Type
+
+
+def type_str(t: Optional[Type]) -> Optional[str]:
+    """
+    :return: A human-readable representation of a type.
+    """
+    if not t:
+        return None
+
+    return re.sub(r"<class '(.*)'>", r'\1', str(t).replace('typing.', ''))

platypush/utils/__init__.py

@@ -13,6 +13,8 @@ import socket
 import ssl
 import time
 import urllib.request
+from importlib.machinery import SourceFileLoader
+from importlib.util import spec_from_loader, module_from_spec
 from multiprocessing import Lock as PLock
 from tempfile import gettempdir
 from threading import Lock as TLock
@@ -86,7 +88,7 @@ def get_backend_module_by_name(backend_name):
         return None
 
 
-def get_plugin_class_by_name(plugin_name):
+def get_plugin_class_by_name(plugin_name) -> Optional[type]:
     """Gets the class of a plugin by name (e.g. "music.mpd" or "media.vlc")"""
 
     module = get_plugin_module_by_name(plugin_name)
@@ -123,7 +125,7 @@ def get_plugin_name_by_class(plugin) -> Optional[str]:
     return '.'.join(class_tokens)
 
 
-def get_backend_class_by_name(backend_name: str):
+def get_backend_class_by_name(backend_name: str) -> Optional[type]:
     """Gets the class of a backend by name (e.g. "backend.http" or "backend.mqtt")"""
 
     module = get_backend_module_by_name(backend_name)
@@ -685,4 +687,22 @@ def get_message_response(msg):
     return response
 
 
+def import_file(path: str, name: Optional[str] = None):
+    """
+    Import a Python file as a module, even if no __init__.py is
+    defined in the directory.
+
+    :param path: Path of the file to import.
+    :param name: Custom name for the imported module (default: same as the file's basename).
+    :return: The imported module.
+    """
+    name = name or re.split(r"\.py$", os.path.basename(path))[0]
+    loader = SourceFileLoader(name, os.path.expanduser(path))
+    mod_spec = spec_from_loader(name, loader)
+    assert mod_spec, f"Cannot create module specification for {path}"
+    mod = module_from_spec(mod_spec)
+    loader.exec_module(mod)
+    return mod
+
+
 # vim:sw=4:ts=4:et:

platypush/utils/manifest.py

@@ -273,6 +273,14 @@ class Dependencies:
     by_pkg_manager: Dict[PackageManagers, Set[str]] = field(default_factory=dict)
     """ All system dependencies, grouped by package manager. """
 
+    def to_dict(self):
+        return {
+            'before': self.before,
+            'packages': list(self.packages),
+            'pip': self.pip,
+            'after': self.after,
+        }
+
     @property
     def _is_venv(self) -> bool:
         """
@@ -517,6 +525,17 @@ class Manifest(ABC):
         :return: The type of the manifest.
         """
 
+    @property
+    def file(self) -> str:
+        """
+        :return: The path to the manifest file.
+        """
+        return os.path.join(
+            get_src_root(),
+            *self.package.split('.')[1:],
+            'manifest.yaml',
+        )
+
     def _init_deps(self, install: Mapping[str, Iterable[str]]) -> Dependencies:
         deps = Dependencies()
         for key, items in install.items():

platypush/utils/mock/__init__.py

@@ -6,6 +6,8 @@ from importlib.machinery import ModuleSpec
 from types import ModuleType
 from typing import Any, Iterator, Sequence, Generator, Optional, List
 
+from .modules import mock_imports
+
 
 class MockObject:
     """
@@ -137,7 +139,7 @@ class MockModule(ModuleType):
 class MockFinder(MetaPathFinder):
     """A finder for mocking."""
 
-    def __init__(self, modules: Sequence[str]) -> None:
+    def __init__(self, modules: Sequence[str]) -> None:  # noqa
         super().__init__()
         self.modules = modules
         self.loader = MockLoader(self)
@@ -178,7 +180,7 @@ class MockLoader(Loader):
 
 
 @contextmanager
-def mock(*modules: str) -> Generator[None, None, None]:
+def mock(*mods: str) -> Generator[None, None, None]:
     """
     Insert mock modules during context::
 
@@ -188,10 +190,25 @@ def mock(*modules: str) -> Generator[None, None, None]:
     """
     finder = None
     try:
-        finder = MockFinder(modules)
+        finder = MockFinder(mods)
         sys.meta_path.insert(0, finder)
         yield
     finally:
         if finder:
             sys.meta_path.remove(finder)
             finder.invalidate_caches()
+
+
+@contextmanager
+def auto_mocks():
+    """
+    Automatically mock all the modules listed in ``mock_imports``.
+    """
+    with mock(*mock_imports):
+        yield
+
+
+__all__ = [
+    "auto_mocks",
+    "mock",
+]

platypush/utils/mock/modules.py

@@ -0,0 +1,111 @@
+mock_imports = [
+    "Adafruit_IO",
+    "Adafruit_Python_DHT",
+    "Leap",
+    "PIL",
+    "PyOBEX",
+    "PyOBEX.client",
+    "RPLCD",
+    "RPi.GPIO",
+    "TheengsDecoder",
+    "aiofiles",
+    "aiofiles.os",
+    "aiohttp",
+    "aioxmpp",
+    "apiclient",
+    "async_lru",
+    "avs",
+    "bcrypt",
+    "bleak",
+    "bluetooth",
+    "bluetooth_numbers",
+    "cpuinfo",
+    "croniter",
+    "cups",
+    "cv2",
+    "cwiid",
+    "dbus",
+    "deepspeech",
+    "defusedxml",
+    "docutils",
+    "envirophat",
+    "feedparser",
+    "gevent.wsgi",
+    "gi",
+    "gi.repository",
+    "google",
+    "google.assistant.embedded",
+    "google.assistant.library",
+    "google.assistant.library.event",
+    "google.assistant.library.file_helpers",
+    "google.oauth2.credentials",
+    "googlesamples",
+    "googlesamples.assistant.grpc.audio_helpers",
+    "gps",
+    "graphyte",
+    "grpc",
+    "gunicorn",
+    "httplib2",
+    "icalendar",
+    "imapclient",
+    "inotify",
+    "inputs",
+    "irc",
+    "irc.bot",
+    "irc.client",
+    "irc.connection",
+    "irc.events",
+    "irc.strings",
+    "kafka",
+    "keras",
+    "linode_api4",
+    "luma",
+    "mpd",
+    "ndef",
+    "nfc",
+    "nio",
+    "numpy",
+    "oauth2client",
+    "oauth2client",
+    "omxplayer",
+    "openzwave",
+    "pandas",
+    "paramiko",
+    "picamera",
+    "plexapi",
+    "pmw3901",
+    "psutil",
+    "pvcheetah",
+    "pvporcupine ",
+    "pyHS100",
+    "pyaudio",
+    "pyclip",
+    "pydbus",
+    "pyfirmata2",
+    "pyngrok",
+    "pyotp",
+    "pysmartthings",
+    "pyzbar",
+    "rtmidi",
+    "samsungtvws",
+    "serial",
+    "simple_websocket",
+    "smartcard",
+    "sounddevice",
+    "soundfile",
+    "telegram",
+    "telegram.ext",
+    "tenacity",
+    "tensorflow",
+    "todoist",
+    "trello",
+    "twilio",
+    "uvicorn",
+    "watchdog",
+    "wave",
+    "websockets",
+    "zeroconf",
+]
+"""
+List of modules that should be mocked when building the documentation or running tests.
+"""