import logging from .helpers import sort_block_devices_based_on_performance, select_largest_device, select_disk_larger_than_or_close_to from ..output import log def suggest_single_disk_layout(block_device, default_filesystem=None, advanced_options=False): if not default_filesystem: from ..user_interaction import ask_for_main_filesystem_format default_filesystem = ask_for_main_filesystem_format(advanced_options) MIN_SIZE_TO_ALLOW_HOME_PART = 40 # Gb using_subvolumes = False if default_filesystem == 'btrfs': using_subvolumes = input('Would you like to use BTRFS subvolumes? (Y/n): ').strip().lower() in ('', 'y', 'yes') layout = { block_device.path : { "wipe" : True, "partitions" : [] } } layout[block_device.path]['partitions'].append({ # Boot "type" : "primary", "start" : "5MB", "size" : "513MB", "boot" : True, "encrypted" : False, "format" : True, "mountpoint" : "/boot", "filesystem" : { "format" : "fat32" } }) layout[block_device.path]['partitions'].append({ # Root "type" : "primary", "start" : "518MB", "encrypted" : False, "format" : True, "mountpoint" : "/", "filesystem" : { "format" : default_filesystem } }) # Set a size for / (/root) if using_subvolumes or block_device.size < MIN_SIZE_TO_ALLOW_HOME_PART: # We'll use subvolumes # Or the disk size is too small to allow for a separate /home layout[block_device.path]['partitions'][-1]['size'] = '100%' else: layout[block_device.path]['partitions'][-1]['size'] = f"{min(block_device.size, 20)}GB" if default_filesystem == 'btrfs' and using_subvolumes: if input('Do you want to use a recommended structure? (Y/n): ').strip().lower() in ('', 'y', 'yes'): # 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 layout[block_device.path]['partitions'][1]['btrfs'] = { "subvolumes" : { "@home" : "/home", "@log" : "/var/log", "@pkgs" : "/var/cache/pacman/pkg", "@.snapshots" : "/.snapshots" } } else: pass # ... implement a guided setup elif block_device.size >= MIN_SIZE_TO_ALLOW_HOME_PART: # If we don't want to use subvolumes, # But we want to be able to re-use data between re-installs.. # A second partition for /home would be nice if we have the space for it layout[block_device.path]['partitions'].append({ # Home "type" : "primary", "encrypted" : False, "format" : True, "start" : f"{min(block_device.size+0.5, 20.5)}GB", "size" : "100%", "mountpoint" : "/home", "filesystem" : { "format" : default_filesystem } }) return layout def suggest_multi_disk_layout(block_devices, default_filesystem=None, advanced_options=False): if not default_filesystem: from ..user_interaction import ask_for_main_filesystem_format default_filesystem = ask_for_main_filesystem_format(advanced_options) # 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_SIZE_TO_ALLOW_HOME_PART = 40 # Gb ARCH_LINUX_INSTALLED_SIZE = 20 # Gb, rough estimate taking in to account user desktops etc. TODO: Catch user packages to detect size? block_devices = sort_block_devices_based_on_performance(block_devices).keys() home_device = select_largest_device(block_devices, gigabytes=MIN_SIZE_TO_ALLOW_HOME_PART) root_device = select_disk_larger_than_or_close_to(block_devices, gigabytes=ARCH_LINUX_INSTALLED_SIZE, filter_out=[home_device]) log(f"Suggesting multi-disk-layout using {len(block_devices)} disks, where {root_device} will be /root and {home_device} will be /home", level=logging.DEBUG) layout = { root_device.path : { "wipe" : True, "partitions" : [] }, home_device.path : { "wipe" : True, "partitions" : [] }, } layout[root_device.path]['partitions'].append({ # Boot "type" : "primary", "start" : "5MB", "size" : "513MB", "boot" : True, "encrypted" : False, "format" : True, "mountpoint" : "/boot", "filesystem" : { "format" : "fat32" } }) layout[root_device.path]['partitions'].append({ # Root "type" : "primary", "start" : "518MB", "encrypted" : False, "format" : True, "size" : "100%", "mountpoint" : "/", "filesystem" : { "format" : default_filesystem } }) layout[home_device.path]['partitions'].append({ # Home "type" : "primary", "encrypted" : False, "format" : True, "start" : "5MB", "size" : "100%", "mountpoint" : "/home", "filesystem" : { "format" : default_filesystem } }) return layout