150 lines
4.1 KiB
Python
150 lines
4.1 KiB
Python
#!/usr/bin/env python3
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import getpass
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import os
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import subprocess
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import sys
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def _run_command(command, input=""):
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if input:
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result = subprocess.run(command,
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capture_output=True,
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text=True,
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check=True,
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input=input)
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else:
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result = subprocess.run(command,
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capture_output=True,
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text=True,
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check=True)
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return result
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def _get_system_memory():
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mem_bytes = os.sysconf('SC_PAGE_SIZE') * os.sysconf('SC_PHYS_PAGES')
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mem_gib = mem_bytes / (1024.**3)
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return round(mem_gib)
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def _y_n(question):
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answer = input("{} (Y/N): ".format(question))
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if answer.lower() == "y":
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return True
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if answer.lower() == "n":
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return False
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print("Please only anwser with Y or N!")
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sys.exit(1)
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def read_disks():
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output = _run_command(["lsblk", "-dpno", "name"])
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disks = []
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for disk in output.stdout.splitlines():
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if "loop" in disk:
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continue
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disks.append(disk)
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return disks
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def create_menu(disks):
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for id, disk in enumerate(disks):
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print("{}: {}".format(id, disk))
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def get_disk_to_format():
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disk_to_format = input("Which disk dou you want to format?: ")
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return int(disk_to_format)
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def _create_partition_table(disk):
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_run_command(["parted", disk, "--", "mklabel", "gpt"])
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def _partition_suffix(disk):
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if "nvmne" in disk:
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return "p"
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return ""
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def create_boot_partition(disk):
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boot_partition = "{}{}1".format(disk, _partition_suffix(disk))
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print("Create boot partition {}.".format(boot_partition))
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_run_command(["parted", disk, "--", "mkpart",
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"ESP", "fat32", "1MiB", "512MiB"])
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_run_command(["parted", disk, "--", "set", 1, "esp", "on"])
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_run_command(["mkfs.fat", "-F", 32, "-n", "BOOT", boot_partition])
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def create_main_partition(disk):
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_run_command(["parted", disk, "--", "mkpart", "primary", "512MiB", "100%"])
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return "{}{}2".format(disk, _partition_suffix(disk))
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def _create_main_filesystem(disk):
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print("Create main partition")
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_run_command(["lvcreate", "-l", "100%FREE", "MainGroup", "-n", "root"])
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_run_command(["mkfs.ext4", "-L", "nixos", "/dev/MainGroup/root"])
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def _create_swap():
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memory = _get_system_memory()
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print("Create swap partition of {} GiB in size".format(memory))
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_run_command(["lvcreate",
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"-L",
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"{}G".format(memory),
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"MainGroup",
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"-n",
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"swap"])
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_run_command(["mkswap", "-L", "swap", "/dev/MainGroup/swap"])
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def _encrypt_disk(partition_path, container_name):
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password = getpass.getpass()
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print("Encrypting disk.")
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_run_command(["cryptsetup", "luksFormat", "-q"
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"--type", "luks1", partition_path], input=password)
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_run_command(["cryptsetup", "open", partition_path, "cryptlvm"],
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input=password)
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def _setup_lvm(lvm_target):
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print("Set up LVM.")
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_run_command(["pvcreate", lvm_target])
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_run_command(["vgcreate", "MainGroup", lvm_target])
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def mount_partitions():
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_run_command(["mount", "/dev/MainGroup/root", "/mnt"])
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os.mkdir("/mnt/boot")
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_run_command(["mount", "/dev/disk/by-label/BOOT", "/mnt/boot"])
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def create_file_systems(partition, swap, encryption):
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print("Creating filesystems.")
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lvm_target = ""
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if encryption:
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lvm_target = "/dev/mapper/cryptlvm"
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_encrypt_disk(partition, lvm_target)
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else:
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lvm_target = partition
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_setup_lvm(lvm_target)
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if swap:
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_create_swap()
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_create_main_filesystem()
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def main():
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disks = read_disks()
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create_menu(disks)
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disk_to_format = disks[get_disk_to_format()]
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swap = _y_n("Do you need swap?")
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encryption = _y_n("Do you want to encrypt your data?")
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create_boot_partition(disk_to_format)
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main_partition = create_main_partition(disk_to_format)
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create_file_systems(main_partition, swap, encryption)
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mount_partitions()
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if __name__ == "__main__":
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main()
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