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#!/opt/cloudlinux/venv/bin/python3 -sbb
# -*- coding: utf-8 -*-
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENCE.TXT
#
"""
Mount configuration builder for website isolation.

The code handles all standard behavior (docroot isolation, home overlay, etc).
"""

import os.path
from dataclasses import dataclass, field

from .jail_config import MountEntry


@dataclass
class IsolatedRootConfig:
    """
    Configuration for a directory overlay.

    Closes access to a directory by mounting a fake/empty directory over it,
    then selectively exposing only whitelisted paths.

    Storage is computed as: {storage_base}/{name}
    """

    # Path to the root of this storage (e.g. ~/.clcagefs/website/123/home)
    root_path: str

    # Real directory to close
    target: str

    # Use temporary tmpfs for storage (default: real directory)
    persistent: bool = True

    # List of mounts made inside of this root (dynamically)
    mounts: list[MountEntry] = field(default_factory=list)

    def mount(self, type_, source, target, opts: tuple = tuple()):
        """Mounts whatever asked into the root of isolated storage"""
        relative_path = os.path.relpath(target, self.target)
        self.mounts.append(MountEntry(type_, source, f"{self.root_path}/{relative_path}", opts))

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