def _import(package: str, plugin: str) -> None:
"""Import the given plugin file from a package"""
if package in _PLUGINS and plugin in _PLUGINS[package]:
return
plugin_module = f"{package}.{plugin}"
try:
importlib.import_module(plugin_module)
except ImportError as err:
if repr(plugin_module) in err.msg: # type: ignore
raise _exceptions.UnknownPluginError(
f"Plugin {plugin!r} not found in {package!r}") from None
elif repr(package) in err.msg: # type: ignore
raise _exceptions.UnknownPackageError(
f"Package {package!r} does not exist") from None
raise
def _import_all(package: str) -> None:
"""Import all plugins in a package"""
try:
all_resources = resources.contents(package) # type: ignore
except ImportError as err:
raise _exceptions.UnknownPackageError(err) from None
# Note that we have tried to import the package by adding it to _PLUGINS
_PLUGINS.setdefault(package, {})
# Loop through all Python files in the directories of the package
plugins = [
r[:-3] for r in all_resources if r.endswith(".py") and not r.startswith("_")
]
for plugin in plugins:
try:
_import(package, plugin)
except ImportError:
pass # Don't let errors in one plugin, affect the others