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File Content: read_only.py

import os.path

from virtualenv.util.lock import NoOpFileLock

from .via_disk_folder import AppDataDiskFolder, PyInfoStoreDisk

class ReadOnlyAppData(AppDataDiskFolder):
    can_update = False

def __init__(self, folder):  # type: (str) -> None
        if not os.path.isdir(folder):
            raise RuntimeError("read-only app data directory {} does not exist".format(folder))
        self.lock = NoOpFileLock(folder)

def reset(self):  # type: () -> None
        raise RuntimeError("read-only app data does not support reset")

def py_info_clear(self):  # type: () -> None
        raise NotImplementedError

def py_info(self, path):
        return _PyInfoStoreDiskReadOnly(self.py_info_at, path)

def embed_update_log(self, distribution, for_py_version):
        raise NotImplementedError

class _PyInfoStoreDiskReadOnly(PyInfoStoreDisk):
    def write(self, content):
        raise RuntimeError("read-only app data python info cannot be updated")

__all__ = ("ReadOnlyAppData",)

Name	Size	Permission
__pycache__	---	0755
__init__.py	1468 bytes	0644
base.py	2129 bytes	0644
na.py	1310 bytes	0644
read_only.py	1006 bytes	0644
via_disk_folder.py	5624 bytes	0644
via_tempdir.py	770 bytes	0644