nixos/scripts/format-sdcard.py

98 lines
2.3 KiB
Python
Executable File

#! /usr/bin/env nix-shell
#! nix-shell -i python3 -p python3 parted
import getpass
import os
import subprocess
def _run_command(command, user_input=""):
if user_input:
result = subprocess.run(
command, capture_output=True, text=True, check=True, input=user_input
)
else:
result = subprocess.run(command, capture_output=True, text=True, check=True)
return result
def _partition_suffix(disk):
if ("nvmne" or "mmc") in disk:
return "p"
return ""
def read_disks():
output = _run_command(["lsblk", "-dpno", "name"])
disks = []
for disk in output.stdout.splitlines():
if "loop" in disk:
continue
disks.append(disk)
return disks
def create_menu(disks):
for position, disk in enumerate(disks):
print("{}: {}".format(position, disk))
def get_disk_to_format():
disk_to_format = input("Which disk dou you want to format?: ")
return int(disk_to_format)
def create_main_partition(disk):
print("Create main partition.")
_run_command(["parted", "--script", disk, "mkpart", "primary", "1GiB", "100%"])
return f"{disk}{_partition_suffix(disk)}2"
def _create_main_filesystem():
_run_command(
[
"mkfs.f2fs",
"-l",
"NixosSd",
"-O",
"extra_attr,inode_checksum,sb_checksum,compression",
"/dev/mapper/cryptsd",
]
)
def _encrypt_disk(partition_path):
password = getpass.getpass()
print("Encrypting disk.")
_run_command(
["cryptsetup", "luksFormat", "-q", partition_path],
user_input=password,
)
_run_command(["cryptsetup", "open", partition_path, "cryptsd"], user_input=password)
def create_file_systems(partition):
print("Creating filesystems.")
_encrypt_disk(partition)
_create_main_filesystem()
def mount_partitions():
print("Mounting partitions.")
_run_command(["mount", "/dev/disk/by-label/NixosSd", "/mnt"])
os.mkdir("/mnt/boot")
_run_command(["mount", "/dev/disk/by-label/SdBoot", "/mnt/boot"])
def main():
disks = read_disks()
create_menu(disks)
disk_to_format = disks[get_disk_to_format()]
main_partition = create_main_partition(disk_to_format)
create_file_systems(main_partition)
mount_partitions()
if __name__ == "__main__":
main()