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opt
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alt
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python312
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lib64
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python3.12
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importlib
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resources
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files >> //opt/alt/python312/lib64/python3.12/importlib/resources/readers.py
import collections import itertools import pathlib import operator import zipfile from . import abc from ._itertools import only def remove_duplicates(items): return iter(collections.OrderedDict.fromkeys(items)) class FileReader(abc.TraversableResources): def __init__(self, loader): self.path = pathlib.Path(loader.path).parent def resource_path(self, resource): """ Return the file system path to prevent `resources.path()` from creating a temporary copy. """ return str(self.path.joinpath(resource)) def files(self): return self.path class ZipReader(abc.TraversableResources): def __init__(self, loader, module): _, _, name = module.rpartition('.') self.prefix = loader.prefix.replace('\\', '/') + name + '/' self.archive = loader.archive def open_resource(self, resource): try: return super().open_resource(resource) except KeyError as exc: raise FileNotFoundError(exc.args[0]) def is_resource(self, path): """ Workaround for `zipfile.Path.is_file` returning true for non-existent paths. """ target = self.files().joinpath(path) return target.is_file() and target.exists() def files(self): return zipfile.Path(self.archive, self.prefix) class MultiplexedPath(abc.Traversable): """ Given a series of Traversable objects, implement a merged version of the interface across all objects. Useful for namespace packages which may be multihomed at a single name. """ def __init__(self, *paths): self._paths = list(map(pathlib.Path, remove_duplicates(paths))) if not self._paths: message = 'MultiplexedPath must contain at least one path' raise FileNotFoundError(message) if not all(path.is_dir() for path in self._paths): raise NotADirectoryError('MultiplexedPath only supports directories') def iterdir(self): children = (child for path in self._paths for child in path.iterdir()) by_name = operator.attrgetter('name') groups = itertools.groupby(sorted(children, key=by_name), key=by_name) return map(self._follow, (locs for name, locs in groups)) def read_bytes(self): raise FileNotFoundError(f'{self} is not a file') def read_text(self, *args, **kwargs): raise FileNotFoundError(f'{self} is not a file') def is_dir(self): return True def is_file(self): return False def joinpath(self, *descendants): try: return super().joinpath(*descendants) except abc.TraversalError: # One of the paths did not resolve (a directory does not exist). # Just return something that will not exist. return self._paths[0].joinpath(*descendants) @classmethod def _follow(cls, children): """ Construct a MultiplexedPath if needed. If children contains a sole element, return it. Otherwise, return a MultiplexedPath of the items. Unless one of the items is not a Directory, then return the first. """ subdirs, one_dir, one_file = itertools.tee(children, 3) try: return only(one_dir) except ValueError: try: return cls(*subdirs) except NotADirectoryError: return next(one_file) def open(self, *args, **kwargs): raise FileNotFoundError(f'{self} is not a file') @property def name(self): return self._paths[0].name def __repr__(self): paths = ', '.join(f"'{path}'" for path in self._paths) return f'MultiplexedPath({paths})' class NamespaceReader(abc.TraversableResources): def __init__(self, namespace_path): if 'NamespacePath' not in str(namespace_path): raise ValueError('Invalid path') self.path = MultiplexedPath(*list(namespace_path)) def resource_path(self, resource): """ Return the file system path to prevent `resources.path()` from creating a temporary copy. """ return str(self.path.joinpath(resource)) def files(self): return self.path
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