Current File : //var/opt/nydus/ops/importlib_resources/_common.py
from __future__ import absolute_import
import os
import tempfile
import contextlib
from ._compat import (
Path, package_spec, FileNotFoundError, ZipPath,
singledispatch, suppress,
)
def from_package(package):
"""
Return a Traversable object for the given package.
"""
spec = package_spec(package)
return from_traversable_resources(spec) or fallback_resources(spec)
def from_traversable_resources(spec):
"""
If the spec.loader implements TraversableResources,
directly or implicitly, it will have a ``files()`` method.
"""
with suppress(AttributeError):
return spec.loader.files()
def fallback_resources(spec):
package_directory = Path(spec.origin).parent
try:
archive_path = spec.loader.archive
rel_path = package_directory.relative_to(archive_path)
return ZipPath(archive_path, str(rel_path) + '/')
except Exception:
pass
return package_directory
@contextlib.contextmanager
def _tempfile(reader, suffix=''):
# Not using tempfile.NamedTemporaryFile as it leads to deeper 'try'
# blocks due to the need to close the temporary file to work on Windows
# properly.
fd, raw_path = tempfile.mkstemp(suffix=suffix)
try:
os.write(fd, reader())
os.close(fd)
yield Path(raw_path)
finally:
try:
os.remove(raw_path)
except FileNotFoundError:
pass
@singledispatch
@contextlib.contextmanager
def as_file(path):
"""
Given a Traversable object, return that object as a
path on the local file system in a context manager.
"""
with _tempfile(path.read_bytes, suffix=path.name) as local:
yield local
@as_file.register(Path)
@contextlib.contextmanager
def _(path):
"""
Degenerate behavior for pathlib.Path objects.
"""
yield path
Mini Shell