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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
using_home_partition = False
if default_filesystem == 'btrfs':
using_subvolumes = input('Would you like to use BTRFS subvolumes with a default structure? (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
}
})
if not using_subvolumes and block_device.size >= MIN_SIZE_TO_ALLOW_HOME_PART:
using_home_partition = input('Would you like to create a separate partition for /home? (Y/n): ').strip().lower() in ('', 'y', 'yes')
# Set a size for / (/root)
if using_subvolumes or block_device.size < MIN_SIZE_TO_ALLOW_HOME_PART or not using_home_partition:
# We'll use subvolumes
# Or the disk size is too small to allow for a separate /home
# Or the user doesn't want to create a separate partition for /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 using_home_partition:
# 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
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