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93 lines
3.0 KiB
Python
93 lines
3.0 KiB
Python
from __future__ import annotations
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import typing
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from pathlib import PurePosixPath
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from ._base import FS
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from ._errors import DirectoryExpected, ResourceNotFound
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if typing.TYPE_CHECKING:
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from collections.abc import Collection
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from typing import IO, Any
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from ._info import Info
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class SubFS(FS):
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"""Maps a sub-directory of another filesystem."""
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def __init__(self, parent: FS, sub_path: str):
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super().__init__()
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self._parent = parent
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self._prefix = PurePosixPath(sub_path).as_posix().rstrip("/")
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if not parent.exists(self._prefix):
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raise ResourceNotFound(f"No such file or directory: {sub_path!r}")
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elif not parent.isdir(self._prefix):
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raise DirectoryExpected(f"{sub_path!r} is not a directory")
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def delegate_fs(self):
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return self._parent
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def _full(self, rel: str) -> str:
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self.check()
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return f"{self._prefix}/{PurePosixPath(rel).as_posix()}".lstrip("/")
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def open(self, path: str, mode: str = "rb", **kwargs) -> IO[Any]:
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return self._parent.open(self._full(path), mode, **kwargs)
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def exists(self, path: str) -> bool:
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return self._parent.exists(self._full(path))
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def isdir(self, path: str) -> bool:
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return self._parent.isdir(self._full(path))
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def isfile(self, path: str) -> bool:
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return self._parent.isfile(self._full(path))
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def listdir(self, path: str) -> list[str]:
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return self._parent.listdir(self._full(path))
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def makedir(self, path: str, recreate: bool = False):
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return self._parent.makedir(self._full(path), recreate=recreate)
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def makedirs(self, path: str, recreate: bool = False):
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return self._parent.makedirs(self._full(path), recreate=recreate)
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def getinfo(self, path: str, namespaces: Collection[str] | None = None) -> Info:
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return self._parent.getinfo(self._full(path), namespaces=namespaces)
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def remove(self, path: str):
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return self._parent.remove(self._full(path))
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def removedir(self, path: str):
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return self._parent.removedir(self._full(path))
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def removetree(self, path: str):
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return self._parent.removetree(self._full(path))
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def movedir(self, src: str, dst: str, create: bool = False):
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self._parent.movedir(self._full(src), self._full(dst), create=create)
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def getsyspath(self, path: str) -> str:
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return self._parent.getsyspath(self._full(path))
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def readbytes(self, path: str) -> bytes:
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return self._parent.readbytes(self._full(path))
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def writebytes(self, path: str, data: bytes):
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self._parent.writebytes(self._full(path), data)
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def __repr__(self) -> str:
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return f"{self.__class__.__name__}({self._parent!r}, {self._prefix!r})"
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def __str__(self) -> str:
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return f"{self._parent}/{self._prefix}"
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class ClosingSubFS(SubFS):
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"""Like SubFS, but auto-closes the parent filesystem when closed."""
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def close(self):
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super().close()
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self._parent.close()
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