1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
import logging
from ..output import log
def suggest_single_disk_layout(block_device, default_filesystem=None):
if not default_filesystem:
from ..user_interaction import ask_for_main_filesystem_format
default_filesystem = ask_for_main_filesystem_format()
MIN_SIZE_TO_ALLOW_HOME_PART = 40 # Gb
layout = {
block_device.path : {
"wipe" : True,
"partitions" : []
}
}
layout[block_device.path]['partitions'].append({
# Boot
"type" : "primary",
"start" : "1MiB",
"size" : "513MiB",
"boot" : True,
"encrypted" : False,
"format" : True,
"mountpoint" : "/boot",
"filesystem" : {
"format" : "fat32"
}
})
layout[block_device.path]['partitions'].append({
# Root
"type" : "primary",
"start" : "513MiB",
"encrypted" : False,
"format" : True,
"size" : "100%" if block_device.size < MIN_SIZE_TO_ALLOW_HOME_PART else f"{min(block_device.size, 20)*1024}MiB",
"mountpoint" : "/",
"filesystem" : {
"format" : default_filesystem
}
})
if default_filesystem == 'btrfs' and input('Would you like to use BTRFS subvolumes? (Y/n): ').strip().lower() in ('', 'y', 'yes'):
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*0.2, 20)*1024}MiB",
"size" : "100%",
"mountpoint" : "/home",
"filesystem" : {
"format" : default_filesystem
}
})
return layout
def suggest_multi_disk_layout(block_devices, default_filesystem=None):
if not default_filesystem:
from ..user_interaction import ask_for_main_filesystem_format
default_filesystem = ask_for_main_filesystem_format()
# 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" : "1MiB",
"size" : "513MiB",
"boot" : True,
"encrypted" : False,
"format" : True,
"mountpoint" : "/boot",
"filesystem" : {
"format" : "fat32"
}
})
layout[root_device.path]['partitions'].append({
# Root
"type" : "primary",
"start" : "513MiB",
"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" : "4MiB",
"size" : "100%",
"mountpoint" : "/home",
"filesystem" : {
"format" : default_filesystem
}
})
return layout
|