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from __future__ import annotations
import io
import os
import shutil
import stat
import typing
import zipfile
from datetime import datetime
from ._base import FS
from ._errors import FileExpected, ResourceNotFound, ResourceReadOnly
from ._info import Info
from ._path import dirname, forcedir, normpath, relpath
from ._tempfs import TempFS
if typing.TYPE_CHECKING:
from collections.abc import Collection
from typing import IO, Any
from ._subfs import SubFS
class ZipFS(FS):
"""Read and write zip files."""
def __new__(
cls, file: str | os.PathLike, write: bool = False, encoding: str = "utf-8"
):
if write:
return WriteZipFS(file, encoding)
else:
return ReadZipFS(file, encoding)
if typing.TYPE_CHECKING:
def __init__(
self, file: str | os.PathLike, write: bool = False, encoding: str = "utf-8"
):
pass
class ReadZipFS(FS):
"""A readable zip file."""
def __init__(self, file: str | os.PathLike, encoding: str = "utf-8"):
super().__init__()
self._file = os.fspath(file)
self.encoding = encoding # unused
self._zip = zipfile.ZipFile(file, "r")
self._directory_fs = None
def __repr__(self) -> str:
return f"ReadZipFS({self._file!r})"
def __str__(self) -> str:
return f"<zipfs '{self._file}'>"
def _path_to_zip_name(self, path: str) -> str:
"""Convert a path to a zip file name."""
path = relpath(normpath(path))
if self._directory.isdir(path):
path = forcedir(path)
return path
@property
def _directory(self) -> TempFS:
if self._directory_fs is None:
self._directory_fs = _fs = TempFS()
for zip_name in self._zip.namelist():
resource_name = zip_name
if resource_name.endswith("/"):
_fs.makedirs(resource_name, recreate=True)
else:
_fs.makedirs(dirname(resource_name), recreate=True)
_fs.create(resource_name)
return self._directory_fs
def close(self):
super(ReadZipFS, self).close()
self._zip.close()
if self._directory_fs is not None:
self._directory_fs.close()
def getinfo(self, path: str, namespaces: Collection[str] | None = None) -> Info:
namespaces = namespaces or ()
raw_info = {}
if path == "/":
raw_info["basic"] = {"name": "", "is_dir": True}
if "details" in namespaces:
raw_info["details"] = {"type": stat.S_IFDIR}
else:
basic_info = self._directory.getinfo(path)
raw_info["basic"] = {"name": basic_info.name, "is_dir": basic_info.is_dir}
if "details" in namespaces:
zip_name = self._path_to_zip_name(path)
try:
zip_info = self._zip.getinfo(zip_name)
except KeyError:
pass
else:
if "details" in namespaces:
raw_info["details"] = {
"size": zip_info.file_size,
"type": int(
stat.S_IFDIR if basic_info.is_dir else stat.S_IFREG
),
"modified": datetime(*zip_info.date_time).timestamp(),
}
return Info(raw_info)
def exists(self, path: str) -> bool:
self.check()
return self._directory.exists(path)
def isdir(self, path: str) -> bool:
self.check()
return self._directory.isdir(path)
def isfile(self, path: str) -> bool:
self.check()
return self._directory.isfile(path)
def listdir(self, path: str) -> str:
self.check()
return self._directory.listdir(path)
def makedir(self, path: str, recreate: bool = False) -> SubFS:
self.check()
raise ResourceReadOnly(path)
def makedirs(self, path: str, recreate: bool = False) -> SubFS:
self.check()
raise ResourceReadOnly(path)
def remove(self, path: str):
self.check()
raise ResourceReadOnly(path)
def removedir(self, path: str):
self.check()
raise ResourceReadOnly(path)
def removetree(self, path: str):
self.check()
raise ResourceReadOnly(path)
def movedir(self, src: str, dst: str, create: bool = False):
self.check()
raise ResourceReadOnly(src)
def readbytes(self, path: str) -> bytes:
self.check()
if not self._directory.isfile(path):
raise ResourceNotFound(path)
zip_name = self._path_to_zip_name(path)
zip_bytes = self._zip.read(zip_name)
return zip_bytes
def open(self, path: str, mode: str = "rb", **kwargs) -> IO[Any]:
self.check()
if self._directory.isdir(path):
raise FileExpected(f"{path!r} is a directory")
zip_mode = mode[0]
if zip_mode == "r" and not self._directory.exists(path):
raise ResourceNotFound(f"No such file or directory: {path!r}")
if any(m in mode for m in "wax+"):
raise ResourceReadOnly(path)
zip_name = self._path_to_zip_name(path)
stream = self._zip.open(zip_name, zip_mode)
if "b" in mode:
if kwargs:
raise ValueError("encoding args invalid for binary operation")
return stream
# Text mode
return io.TextIOWrapper(stream, **kwargs)
class WriteZipFS(TempFS):
"""A writable zip file."""
def __init__(self, file: str | os.PathLike, encoding: str = "utf-8"):
super().__init__()
self._file = os.fspath(file)
self.encoding = encoding # unused
def __repr__(self) -> str:
return f"WriteZipFS({self._file!r})"
def __str__(self) -> str:
return f"<zipfs-write '{self._file}'>"
def close(self):
base_name = os.path.splitext(self._file)[0]
shutil.make_archive(base_name, format="zip", root_dir=self._temp_dir)
if self._file != base_name + ".zip":
shutil.move(base_name + ".zip", self._file)
super().close()
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