mirror of
https://github.com/python/cpython.git
synced 2025-10-31 10:26:02 +00:00
123 lines
3.5 KiB
Python
123 lines
3.5 KiB
Python
import collections
|
|
import zipfile
|
|
import pathlib
|
|
from . import abc
|
|
|
|
|
|
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):
|
|
visited = []
|
|
for path in self._paths:
|
|
for file in path.iterdir():
|
|
if file.name in visited:
|
|
continue
|
|
visited.append(file.name)
|
|
yield file
|
|
|
|
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, child):
|
|
# first try to find child in current paths
|
|
for file in self.iterdir():
|
|
if file.name == child:
|
|
return file
|
|
# if it does not exist, construct it with the first path
|
|
return self._paths[0] / child
|
|
|
|
__truediv__ = joinpath
|
|
|
|
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
|