from __future__ import annotations from pathlib import Path from typing import Any, TYPE_CHECKING from typing import Optional, List, Tuple from .. import disk from ..disk.device_model import BtrfsMountOption from ..hardware import SysInfo from ..menu import Menu from ..menu import TableMenu from ..menu.menu import MenuSelectionType from ..output import FormattedOutput, debug from ..utils.util import prompt_dir from ..storage import storage if TYPE_CHECKING: _: Any def select_devices(preset: List[disk.BDevice] = []) -> List[disk.BDevice]: """ Asks the user to select one or multiple devices :return: List of selected devices :rtype: list """ def _preview_device_selection(selection: disk._DeviceInfo) -> Optional[str]: dev = disk.device_handler.get_device(selection.path) if dev and dev.partition_infos: return FormattedOutput.as_table(dev.partition_infos) return None if preset is None: preset = [] title = str(_('Select one or more devices to use and configure')) warning = str(_('If you reset the device selection this will also reset the current disk layout. Are you sure?')) devices = disk.device_handler.devices options = [d.device_info for d in devices] preset_value = [p.device_info for p in preset] choice = TableMenu( title, data=options, multi=True, preset=preset_value, preview_command=_preview_device_selection, preview_title=str(_('Existing Partitions')), preview_size=0.2, allow_reset=True, allow_reset_warning_msg=warning ).run() match choice.type_: case MenuSelectionType.Reset: return [] case MenuSelectionType.Skip: return preset case MenuSelectionType.Selection: selected_device_info: List[disk._DeviceInfo] = choice.value # type: ignore selected_devices = [] for device in devices: if device.device_info in selected_device_info: selected_devices.append(device) return selected_devices def get_default_partition_layout( devices: List[disk.BDevice], filesystem_type: Optional[disk.FilesystemType] = None, advanced_option: bool = False ) -> List[disk.DeviceModification]: if len(devices) == 1: device_modification = suggest_single_disk_layout( devices[0], filesystem_type=filesystem_type, advanced_options=advanced_option ) return [device_modification] else: return suggest_multi_disk_layout( devices, filesystem_type=filesystem_type, advanced_options=advanced_option ) def _manual_partitioning( preset: List[disk.DeviceModification], devices: List[disk.BDevice] ) -> List[disk.DeviceModification]: modifications = [] for device in devices: mod = next(filter(lambda x: x.device == device, preset), None) if not mod: mod = disk.DeviceModification(device, wipe=False) if partitions := disk.manual_partitioning(device, preset=mod.partitions): mod.partitions = partitions modifications.append(mod) return modifications def select_disk_config( preset: Optional[disk.DiskLayoutConfiguration] = None, advanced_option: bool = False ) -> Optional[disk.DiskLayoutConfiguration]: default_layout = disk.DiskLayoutType.Default.display_msg() manual_mode = disk.DiskLayoutType.Manual.display_msg() pre_mount_mode = disk.DiskLayoutType.Pre_mount.display_msg() options = [default_layout, manual_mode, pre_mount_mode] preset_value = preset.config_type.display_msg() if preset else None warning = str(_('Are you sure you want to reset this setting?')) choice = Menu( _('Select a partitioning option'), options, allow_reset=True, allow_reset_warning_msg=warning, sort=False, preview_size=0.2, preset_values=preset_value ).run() match choice.type_: case MenuSelectionType.Skip: return preset case MenuSelectionType.Reset: return None case MenuSelectionType.Selection: if choice.single_value == pre_mount_mode: output = "You will use whatever drive-setup is mounted at the specified directory\n" output += "WARNING: Archinstall won't check the suitability of this setup\n" try: path = prompt_dir(str(_('Enter the root directory of the mounted devices: ')), output) except (KeyboardInterrupt, EOFError): return preset mods = disk.device_handler.detect_pre_mounted_mods(path) storage['MOUNT_POINT'] = Path(path) return disk.DiskLayoutConfiguration( config_type=disk.DiskLayoutType.Pre_mount, device_modifications=mods, mountpoint=path ) preset_devices = [mod.device for mod in preset.device_modifications] if preset else [] devices = select_devices(preset_devices) if not devices: return None if choice.value == default_layout: modifications = get_default_partition_layout(devices, advanced_option=advanced_option) if modifications: return disk.DiskLayoutConfiguration( config_type=disk.DiskLayoutType.Default, device_modifications=modifications ) elif choice.value == manual_mode: preset_mods = preset.device_modifications if preset else [] modifications = _manual_partitioning(preset_mods, devices) if modifications: return disk.DiskLayoutConfiguration( config_type=disk.DiskLayoutType.Manual, device_modifications=modifications ) return None def _boot_partition(sector_size: disk.SectorSize, using_gpt: bool) -> disk.PartitionModification: flags = [disk.PartitionFlag.Boot] if using_gpt: start = disk.Size(1, disk.Unit.MiB, sector_size) size = disk.Size(1, disk.Unit.GiB, sector_size) flags.append(disk.PartitionFlag.ESP) else: start = disk.Size(3, disk.Unit.MiB, sector_size) size = disk.Size(203, disk.Unit.MiB, sector_size) # boot partition return disk.PartitionModification( status=disk.ModificationStatus.Create, type=disk.PartitionType.Primary, start=start, length=size, mountpoint=Path('/boot'), fs_type=disk.FilesystemType.Fat32, flags=flags ) def select_main_filesystem_format(advanced_options=False) -> disk.FilesystemType: options = { 'btrfs': disk.FilesystemType.Btrfs, 'ext4': disk.FilesystemType.Ext4, 'xfs': disk.FilesystemType.Xfs, 'f2fs': disk.FilesystemType.F2fs } if advanced_options: options.update({'ntfs': disk.FilesystemType.Ntfs}) prompt = _('Select which filesystem your main partition should use') choice = Menu(prompt, options, skip=False, sort=False).run() return options[choice.single_value] def select_mount_options() -> List[str]: prompt = str(_('Would you like to use compression or disable CoW?')) options = [str(_('Use compression')), str(_('Disable Copy-on-Write'))] choice = Menu(prompt, options, sort=False).run() if choice.type_ == MenuSelectionType.Selection: if choice.single_value == options[0]: return [BtrfsMountOption.compress.value] else: return [BtrfsMountOption.nodatacow.value] return [] def suggest_single_disk_layout( device: disk.BDevice, filesystem_type: Optional[disk.FilesystemType] = None, advanced_options: bool = False, separate_home: Optional[bool] = None ) -> disk.DeviceModification: if not filesystem_type: filesystem_type = select_main_filesystem_format(advanced_options) sector_size = device.device_info.sector_size min_size_to_allow_home_part = disk.Size(40, disk.Unit.GiB, sector_size) root_partition_size = disk.Size(20, disk.Unit.GiB, sector_size) using_subvolumes = False using_home_partition = False mount_options = [] device_size_gib = device.device_info.total_size if filesystem_type == disk.FilesystemType.Btrfs: prompt = str(_('Would you like to use BTRFS subvolumes with a default structure?')) choice = Menu(prompt, Menu.yes_no(), skip=False, default_option=Menu.yes()).run() using_subvolumes = choice.value == Menu.yes() mount_options = select_mount_options() device_modification = disk.DeviceModification(device, wipe=True) using_gpt = SysInfo.has_uefi() # Used for reference: https://wiki.archlinux.org/title/partitioning # 2 MiB is unallocated for GRUB on BIOS. Potentially unneeded for other bootloaders? # TODO: On BIOS, /boot partition is only needed if the drive will # be encrypted, otherwise it is not recommended. We should probably # add a check for whether the drive will be encrypted or not. # Increase the UEFI partition if UEFI is detected. # Also re-align the start to 1MiB since we don't need the first sectors # like we do in MBR layouts where the boot loader is installed traditionally. boot_partition = _boot_partition(sector_size, using_gpt) device_modification.add_partition(boot_partition) if not using_subvolumes: if device_size_gib >= min_size_to_allow_home_part: if separate_home is None: prompt = str(_('Would you like to create a separate partition for /home?')) choice = Menu(prompt, Menu.yes_no(), skip=False, default_option=Menu.yes()).run() using_home_partition = choice.value == Menu.yes() elif separate_home is True: using_home_partition = True else: using_home_partition = False align_buffer = disk.Size(1, disk.Unit.MiB, sector_size) # root partition root_start = boot_partition.start + boot_partition.length # Set a size for / (/root) if using_subvolumes or device_size_gib < min_size_to_allow_home_part or not using_home_partition: root_length = device.device_info.total_size - root_start else: root_length = min(device.device_info.total_size, root_partition_size) if using_gpt and not using_home_partition: root_length -= align_buffer root_partition = disk.PartitionModification( status=disk.ModificationStatus.Create, type=disk.PartitionType.Primary, start=root_start, length=root_length, mountpoint=Path('/') if not using_subvolumes else None, fs_type=filesystem_type, mount_options=mount_options ) device_modification.add_partition(root_partition) if using_subvolumes: # https://btrfs.wiki.kernel.org/index.php/FAQ # https://unix.stackexchange.com/questions/246976/btrfs-subvolume-uuid-clash # https://github.com/classy-giraffe/easy-arch/blob/main/easy-arch.sh subvolumes = [ disk.SubvolumeModification(Path('@'), Path('/')), disk.SubvolumeModification(Path('@home'), Path('/home')), disk.SubvolumeModification(Path('@log'), Path('/var/log')), disk.SubvolumeModification(Path('@pkg'), Path('/var/cache/pacman/pkg')), disk.SubvolumeModification(Path('@.snapshots'), Path('/.snapshots')) ] root_partition.btrfs_subvols = subvolumes elif using_home_partition: # If we don't want to use subvolumes, # But we want to be able to reuse data between re-installs.. # A second partition for /home would be nice if we have the space for it home_start = root_partition.start + root_partition.length home_length = device.device_info.total_size - home_start if using_gpt: home_length -= align_buffer home_partition = disk.PartitionModification( status=disk.ModificationStatus.Create, type=disk.PartitionType.Primary, start=home_start, length=home_length, mountpoint=Path('/home'), fs_type=filesystem_type, mount_options=mount_options ) device_modification.add_partition(home_partition) return device_modification def suggest_multi_disk_layout( devices: List[disk.BDevice], filesystem_type: Optional[disk.FilesystemType] = None, advanced_options: bool = False ) -> List[disk.DeviceModification]: if not devices: return [] # Not really a rock solid foundation of information to stand on, but it's a start: # https://www.reddit.com/r/btrfs/comments/m287gp/partition_strategy_for_two_physical_disks/ # https://www.reddit.com/r/btrfs/comments/9us4hr/what_is_your_btrfs_partitionsubvolumes_scheme/ min_home_partition_size = disk.Size(40, disk.Unit.GiB, disk.SectorSize.default()) # rough estimate taking in to account user desktops etc. TODO: Catch user packages to detect size? desired_root_partition_size = disk.Size(20, disk.Unit.GiB, disk.SectorSize.default()) mount_options = [] if not filesystem_type: filesystem_type = select_main_filesystem_format(advanced_options) # find proper disk for /home possible_devices = list(filter(lambda x: x.device_info.total_size >= min_home_partition_size, devices)) home_device = max(possible_devices, key=lambda d: d.device_info.total_size) if possible_devices else None # find proper device for /root devices_delta = {} for device in devices: if device is not home_device: delta = device.device_info.total_size - desired_root_partition_size devices_delta[device] = delta sorted_delta: List[Tuple[disk.BDevice, Any]] = sorted(devices_delta.items(), key=lambda x: x[1]) root_device: Optional[disk.BDevice] = sorted_delta[0][0] if home_device is None or root_device is None: text = _('The selected drives do not have the minimum capacity required for an automatic suggestion\n') text += _('Minimum capacity for /home partition: {}GiB\n').format(min_home_partition_size.format_size(disk.Unit.GiB)) text += _('Minimum capacity for Arch Linux partition: {}GiB').format(desired_root_partition_size.format_size(disk.Unit.GiB)) Menu(str(text), [str(_('Continue'))], skip=False).run() return [] if filesystem_type == disk.FilesystemType.Btrfs: mount_options = select_mount_options() device_paths = ', '.join([str(d.device_info.path) for d in devices]) debug(f"Suggesting multi-disk-layout for devices: {device_paths}") debug(f"/root: {root_device.device_info.path}") debug(f"/home: {home_device.device_info.path}") root_device_modification = disk.DeviceModification(root_device, wipe=True) home_device_modification = disk.DeviceModification(home_device, wipe=True) root_device_sector_size = root_device_modification.device.device_info.sector_size home_device_sector_size = home_device_modification.device.device_info.sector_size root_align_buffer = disk.Size(1, disk.Unit.MiB, root_device_sector_size) home_align_buffer = disk.Size(1, disk.Unit.MiB, home_device_sector_size) using_gpt = SysInfo.has_uefi() # add boot partition to the root device boot_partition = _boot_partition(root_device_sector_size, using_gpt) root_device_modification.add_partition(boot_partition) root_start = boot_partition.start + boot_partition.length root_length = root_device.device_info.total_size - root_start if using_gpt: root_length -= root_align_buffer # add root partition to the root device root_partition = disk.PartitionModification( status=disk.ModificationStatus.Create, type=disk.PartitionType.Primary, start=root_start, length=root_length, mountpoint=Path('/'), mount_options=mount_options, fs_type=filesystem_type ) root_device_modification.add_partition(root_partition) home_start = home_align_buffer home_length = home_device.device_info.total_size - home_start if using_gpt: home_length -= home_align_buffer # add home partition to home device home_partition = disk.PartitionModification( status=disk.ModificationStatus.Create, type=disk.PartitionType.Primary, start=home_start, length=home_length, mountpoint=Path('/home'), mount_options=mount_options, fs_type=filesystem_type, ) home_device_modification.add_partition(home_partition) return [root_device_modification, home_device_modification]