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import pathlib, glob
import logging
from typing import Union
from .helpers import get_mount_info
from ..exceptions import DiskError
from ..general import SysCommand
from ..output import log
def mount_subvolume(installation, subvolume_location :Union[pathlib.Path, str], force=False) -> bool:
"""
This function uses mount to mount a subvolume on a given device, at a given location with a given subvolume name.
@installation: archinstall.Installer instance
@subvolume_location: a localized string or path inside the installation / or /boot for instance without specifying /mnt/boot
@force: overrides the check for weither or not the subvolume mountpoint is empty or not
"""
installation_mountpoint = installation.target
if type(installation_mountpoint) == str:
installation_mountpoint = pathlib.Path(installation_mountpoint)
# Set up the required physical structure
if type(subvolume_location) == str:
subvolume_location = pathlib.Path(subvolume_location)
target = installation_mountpoint / subvolume_location.relative_to(subvolume_location.anchor)
if not (target).exists():
(target).mkdir(parents=True)
if glob.glob(str(target/'*')) and force is False:
raise DiskError(f"Cannot mount subvolume to {target} because it contains data (non-empty folder target)")
log(f"Mounting {target} as a subvolume", level=logging.INFO)
# Mount the logical volume to the physical structure
mountpoint_device, mountpoint_device_real_path = get_mount_info(target, traverse=True, return_real_path=True)['source']
if mountpoint_device_real_path == str(target):
log(f"Unmounting non-subvolume {mountpoint_device} previously mounted at {target}")
SysCommand(f"umount {mountpoint_device}")
return SysCommand(f"mount {mountpoint_device} {target} -o subvol=@{subvolume_location}").exit_code == 0
def create_subvolume(installation, location :Union[pathlib.Path, str]) -> bool:
"""
This function uses btrfs to create a subvolume.
@installation: archinstall.Installer instance
@location: a localized string or path inside the installation / or /boot for instance without specifying /mnt/boot
"""
log(f"Creating a subvolume on {installation.target}/{str(location)}", level=logging.INFO)
SysCommand(f"btrfs subvolume create {installation.target}/{str(location)}")
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