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 mount_information, mountpoint_device_real_path = get_mount_info(target, traverse=True, return_real_path=True) if mountpoint_device_real_path == str(target): log(f"Unmounting non-subvolume {mount_information['source']} previously mounted at {target}") SysCommand(f"umount {mount_information['source']}") return SysCommand(f"mount {mount_information['source']} {target} -o subvol=@{subvolume_location}").exit_code == 0 def create_subvolume(installation, subvolume_location :Union[pathlib.Path, str]) -> bool: """ This function uses btrfs to create a subvolume. @installation: archinstall.Installer instance @subvolume_location: a localized string or path inside the installation / or /boot for instance without specifying /mnt/boot """ 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) # Difference from mount_subvolume: # We only check if the parent exists, since we'll run in to "target path already exists" otherwise if not target.parent.exists(): target.parent.mkdir(parents=True) if glob.glob(str(target/'*')) and force is False: raise DiskError(f"Cannot create subvolume at {target} because it contains data (non-empty folder target)") # Remove the target if it exists if target.exists(): target.rmdir() log(f"Creating a subvolume on {target}", level=logging.INFO) if (cmd := SysCommand(f"btrfs subvolume create {target}")).exit_code != 0: raise DiskError(f"Could not create a subvolume at {target}: {cmd}")