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Nexus/server/utils/rsync_elevation.py
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"""Rsync remote receiver elevation — mirrors ``files_elevation`` for file push.
Policy (same as file manager): **root** SSH → no sudo; **non-root** with default
``auto_sudo`` (or ``always_sudo``) → ``sudo -n rsync`` on the receiver.
Only ``files_elevation=off`` disables elevation.
"""
from __future__ import annotations
from server.domain.models import Server
from server.utils.files_elevation import FilesElevation, get_files_elevation
# Fixed remote receiver command (no user input); requires NOPASSWD rsync in sudoers.
RSYNC_SUDO_RECEIVER_PATH = "sudo -n rsync"
def is_root_ssh_user(server: Server) -> bool:
ssh_user = (server.username or "root").strip() or "root"
return ssh_user == "root"
def rsync_receiver_path_for_push(server: Server) -> str | None:
"""Return ``--rsync-path`` for non-root servers when elevation is enabled."""
if is_root_ssh_user(server):
return None
if get_files_elevation(server) == FilesElevation.OFF:
return None
return RSYNC_SUDO_RECEIVER_PATH
def rsync_elevation_log_hint(server: Server) -> str | None:
"""Short tag for sync_logs.push_permission."""
if is_root_ssh_user(server):
return None
if get_files_elevation(server) == FilesElevation.OFF:
return None
return "rsync=sudo"