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116 lines
3.5 KiB
Python
116 lines
3.5 KiB
Python
import sys
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import os
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from itertools import groupby
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from operator import attrgetter
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from typing import Dict, List, Type, Iterator, TypeVar, Optional, ContextManager
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from pathlib import Path
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from contextlib import contextmanager
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from ..compat import importlib_metadata, find_entry_points, get_dist_name
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from ..utils import repr_dict, as_site
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from . import AuthPlugin, ConverterPlugin, FormatterPlugin, TransportPlugin
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from .base import BasePlugin
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ENTRY_POINT_CLASSES = {
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'httpie.plugins.auth.v1': AuthPlugin,
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'httpie.plugins.converter.v1': ConverterPlugin,
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'httpie.plugins.formatter.v1': FormatterPlugin,
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'httpie.plugins.transport.v1': TransportPlugin
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}
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ENTRY_POINT_NAMES = list(ENTRY_POINT_CLASSES.keys())
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@contextmanager
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def _load_directory(plugins_dir: Path) -> Iterator[None]:
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plugins_path = os.fspath(plugins_dir)
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sys.path.insert(0, plugins_path)
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try:
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yield
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finally:
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sys.path.remove(plugins_path)
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T = TypeVar("T")
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@contextmanager
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def nullcontext(obj: Optional[T] = None) -> Iterator[Optional[T]]:
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# A naive replacement of the nullcontext() for 3.6
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yield obj
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def enable_plugins(plugins_dir: Optional[Path]) -> ContextManager[None]:
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if plugins_dir is None:
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return nullcontext()
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else:
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return _load_directory(as_site(plugins_dir))
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class PluginManager(list):
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def register(self, *plugins: Type[BasePlugin]):
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for plugin in plugins:
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self.append(plugin)
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def unregister(self, plugin: Type[BasePlugin]):
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self.remove(plugin)
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def filter(self, by_type=Type[BasePlugin]):
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return [plugin for plugin in self if issubclass(plugin, by_type)]
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def iter_entry_points(self, directory: Optional[Path] = None):
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with enable_plugins(directory):
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eps = importlib_metadata.entry_points()
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for entry_point_name in ENTRY_POINT_NAMES:
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yield from find_entry_points(eps, group=entry_point_name)
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def load_installed_plugins(self, directory: Optional[Path] = None):
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for entry_point in self.iter_entry_points(directory):
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plugin = entry_point.load()
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plugin.package_name = get_dist_name(entry_point)
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self.register(entry_point.load())
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# Auth
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def get_auth_plugins(self) -> List[Type[AuthPlugin]]:
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return self.filter(AuthPlugin)
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def get_auth_plugin_mapping(self) -> Dict[str, Type[AuthPlugin]]:
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return {
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plugin.auth_type: plugin for plugin in self.get_auth_plugins()
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}
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def get_auth_plugin(self, auth_type: str) -> Type[AuthPlugin]:
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return self.get_auth_plugin_mapping()[auth_type]
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# Output processing
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def get_formatters(self) -> List[Type[FormatterPlugin]]:
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return self.filter(FormatterPlugin)
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def get_formatters_grouped(self) -> Dict[str, List[Type[FormatterPlugin]]]:
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return {
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group_name: list(group)
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for group_name, group
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in groupby(self.get_formatters(), key=attrgetter('group_name'))
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}
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def get_converters(self) -> List[Type[ConverterPlugin]]:
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return self.filter(ConverterPlugin)
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# Adapters
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def get_transport_plugins(self) -> List[Type[TransportPlugin]]:
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return self.filter(TransportPlugin)
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def __str__(self):
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return repr_dict({
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'adapters': self.get_transport_plugins(),
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'auth': self.get_auth_plugins(),
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'converters': self.get_converters(),
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'formatters': self.get_formatters(),
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})
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def __repr__(self):
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return f'<{type(self).__name__} {self}>'
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