mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-22 21:05:05 +00:00
103 lines
3 KiB
Python
103 lines
3 KiB
Python
from importlib.machinery import ModuleSpec
|
|
import importlib.util
|
|
import sys
|
|
from types import ModuleType
|
|
from typing import Iterable, Optional, Sequence
|
|
|
|
|
|
class VendorImporter:
|
|
"""
|
|
A PEP 302 meta path importer for finding optionally-vendored
|
|
or otherwise naturally-installed packages from root_name.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
root_name: str,
|
|
vendored_names: Iterable[str] = (),
|
|
vendor_pkg: Optional[str] = None,
|
|
):
|
|
self.root_name = root_name
|
|
self.vendored_names = set(vendored_names)
|
|
self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
|
|
|
|
@property
|
|
def search_path(self):
|
|
"""
|
|
Search first the vendor package then as a natural package.
|
|
"""
|
|
yield self.vendor_pkg + '.'
|
|
yield ''
|
|
|
|
def _module_matches_namespace(self, fullname):
|
|
"""Figure out if the target module is vendored."""
|
|
root, base, target = fullname.partition(self.root_name + '.')
|
|
return not root and any(map(target.startswith, self.vendored_names))
|
|
|
|
def load_module(self, fullname: str):
|
|
"""
|
|
Iterate over the search path to locate and load fullname.
|
|
"""
|
|
root, base, target = fullname.partition(self.root_name + '.')
|
|
for prefix in self.search_path:
|
|
try:
|
|
extant = prefix + target
|
|
__import__(extant)
|
|
mod = sys.modules[extant]
|
|
sys.modules[fullname] = mod
|
|
return mod
|
|
except ImportError:
|
|
pass
|
|
else:
|
|
raise ImportError(
|
|
"The '{target}' package is required; "
|
|
"normally this is bundled with this package so if you get "
|
|
"this warning, consult the packager of your "
|
|
"distribution.".format(**locals())
|
|
)
|
|
|
|
def create_module(self, spec: ModuleSpec):
|
|
return self.load_module(spec.name)
|
|
|
|
def exec_module(self, module: ModuleType):
|
|
pass
|
|
|
|
def find_spec(
|
|
self,
|
|
fullname: str,
|
|
path: Optional[Sequence[str]] = None,
|
|
target: Optional[ModuleType] = None,
|
|
):
|
|
"""Return a module spec for vendored names."""
|
|
return (
|
|
# This should fix itself next mypy release https://github.com/python/typeshed/pull/11890
|
|
importlib.util.spec_from_loader(fullname, self) # type: ignore[arg-type]
|
|
if self._module_matches_namespace(fullname)
|
|
else None
|
|
)
|
|
|
|
def install(self):
|
|
"""
|
|
Install this importer into sys.meta_path if not already present.
|
|
"""
|
|
if self not in sys.meta_path:
|
|
sys.meta_path.append(self)
|
|
|
|
|
|
# [[[cog
|
|
# import cog
|
|
# from tools.vendored import yield_top_level
|
|
# names = "\n".join(f" {x!r}," for x in yield_top_level('pkg_resources'))
|
|
# cog.outl(f"names = (\n{names}\n)")
|
|
# ]]]
|
|
names = (
|
|
'backports',
|
|
'importlib_resources',
|
|
'jaraco',
|
|
'more_itertools',
|
|
'packaging',
|
|
'platformdirs',
|
|
'zipp',
|
|
)
|
|
# [[[end]]]
|
|
VendorImporter(__name__, names).install()
|