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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, 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
@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
"""
# Set up the required physical structure
if type(location) == str:
location = pathlib.Path(location)
if not location.exists():
location.mkdir(parents=True)
if glob.glob(str(installation.target/location/'*')) and force is False:
raise DiskError(f"Cannot mount subvolume to {installation.target/location} because it contains data (non-empty folder target)")
log(f"Mounting {location} as a subvolume", level=logging.INFO)
# Mount the logical volume to the physical structure
mount_location = get_mount_info(installation.target/location, traverse=True)['source']
SysCommand(f"umount {mount_location}")
return SysCommand(f"mount {mount_location} {installation.target}/{str(location)} -o subvol=@/{str(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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