| index : archinstall32 | |
| Archlinux32 installer | gitolite user |
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| -rw-r--r-- | archinstall/lib/disk/btrfs/btrfspartition.py | 116 |
diff --git a/archinstall/lib/disk/btrfs/btrfspartition.py b/archinstall/lib/disk/btrfs/btrfspartition.py new file mode 100644 index 00000000..5020133d --- /dev/null +++ b/archinstall/lib/disk/btrfs/btrfspartition.py @@ -0,0 +1,116 @@ +import glob +import pathlib +import logging +from typing import Optional, TYPE_CHECKING + +from ...exceptions import DiskError +from ...storage import storage +from ...output import log +from ...general import SysCommand +from ..partition import Partition +from ..helpers import findmnt +from .btrfs_helpers import ( + subvolume_info_from_path +) + +if TYPE_CHECKING: + from ...installer import Installer + from .btrfssubvolume import BtrfsSubvolume + +class BTRFSPartition(Partition): + def __init__(self, *args, **kwargs): + Partition.__init__(self, *args, **kwargs) + + def __repr__(self, *args :str, **kwargs :str) -> str: + mount_repr = '' + if self.mountpoint: + mount_repr = f", mounted={self.mountpoint}" + elif self.target_mountpoint: + mount_repr = f", rel_mountpoint={self.target_mountpoint}" + + if self._encrypted: + return f'BTRFSPartition(path={self.path}, size={self.size}, PARTUUID={self._safe_uuid}, parent={self.real_device}, fs={self.filesystem}{mount_repr})' + else: + return f'BTRFSPartition(path={self.path}, size={self.size}, PARTUUID={self._safe_uuid}, fs={self.filesystem}{mount_repr})' + + @property + def subvolumes(self): + for filesystem in findmnt(pathlib.Path(self.path), recurse=True).get('filesystems', []): + if '[' in filesystem.get('source', ''): + yield subvolume_info_from_path(filesystem['target']) + + def iterate_children(struct): + for child in struct.get('children', []): + if '[' in child.get('source', ''): + yield subvolume_info_from_path(child['target']) + + for sub_child in iterate_children(child): + yield sub_child + + for child in iterate_children(filesystem): + yield child + + def create_subvolume(self, subvolume :pathlib.Path, installation :Optional['Installer'] = None) -> 'BtrfsSubvolume': + """ + Subvolumes have to be created within a mountpoint. + This means we need to get the current installation target. + After we get it, we need to verify it is a btrfs subvolume filesystem. + Finally, the destination must be empty. + """ + + # Allow users to override the installation session + if not installation: + installation = storage.get('installation_session') + + # Determain if the path given, is an absolute path or a releative path. + # We do this by checking if the path contains a known mountpoint. + if str(subvolume)[0] == '/': + if filesystems := findmnt(subvolume, traverse=True).get('filesystems'): + if (target := filesystems[0].get('target')) and target != '/' and str(subvolume).startswith(target): + # Path starts with a known mountpoint which isn't / + # Which means it's an absolut path to a mounted location. + pass + else: + # Since it's not an absolute position with a known start. + # We omit the anchor ('/' basically) and make sure it's appendable + # to the installation.target later + subvolume = subvolume.relative_to(subvolume.anchor) + # else: We don't need to do anything about relative paths, they should be appendable to installation.target as-is. + + # If the subvolume is not absolute, then we do two checks: + # 1. Check if the partition itself is mounted somewhere, and use that as a root + # 2. Use an active Installer().target as the root, assuming it's filesystem is btrfs + # If both above fail, we need to warn the user that such setup is not supported. + if str(subvolume)[0] != '/': + if self.mountpoint is None and installation is None: + raise DiskError("When creating a subvolume on BTRFSPartition()'s, you need to either initiate a archinstall.Installer() or give absolute paths when creating the subvoulme.") + elif self.mountpoint: + subvolume = self.mountpoint / subvolume + elif installation: + ongoing_installation_destination = installation.target + if type(ongoing_installation_destination) == str: + ongoing_installation_destination = pathlib.Path(ongoing_installation_destination) + + subvolume = ongoing_installation_destination / subvolume + + subvolume.parent.mkdir(parents=True, exist_ok=True) + + # <!-- + # We perform one more check from the given absolute position. + # And we traverse backwards in order to locate any if possible subvolumes above + # our new btrfs subvolume. This is because it needs to be mounted under it to properly + # function. + # if btrfs_parent := find_parent_subvolume(subvolume): + # print('Found parent:', btrfs_parent) + # --> + + log(f'Attempting to create subvolume at {subvolume}', level=logging.DEBUG, fg="grey") + + if glob.glob(str(subvolume / '*')): + raise DiskError(f"Cannot create subvolume at {subvolume} because it contains data (non-empty folder target is not supported by BTRFS)") + elif subvolinfo := subvolume_info_from_path(subvolume): + raise DiskError(f"Destination {subvolume} is already a subvolume: {subvolinfo}") + + SysCommand(f"btrfs subvolume create {subvolume}") + + return subvolume_info_from_path(subvolume)
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