kupferbootstrap/flash.py
2022-11-09 20:11:20 +01:00

90 lines
3.8 KiB
Python

import shutil
import os
import click
from constants import FLASH_PARTS, LOCATIONS
from exec.cmd import run_root_cmd
from exec.file import get_temp_dir
from fastboot import fastboot_flash
from image import dd_image, partprobe, shrink_fs, losetup_rootfs_image, losetup_destroy, dump_aboot, dump_lk2nd, dump_qhypstub, get_flavour, get_image_name, get_image_path
from packages.device import get_profile_device
from wrapper import enforce_wrap
ABOOT = FLASH_PARTS['ABOOT']
LK2ND = FLASH_PARTS['LK2ND']
QHYPSTUB = FLASH_PARTS['QHYPSTUB']
ROOTFS = FLASH_PARTS['ROOTFS']
@click.command(name='flash')
@click.argument('what', type=click.Choice(list(FLASH_PARTS.values())))
@click.argument('location', type=str, required=False)
def cmd_flash(what: str, location: str):
"""Flash a partition onto a device. `location` takes either a path to a block device or one of emmc, sdcard"""
enforce_wrap()
device = get_profile_device()
flavour = get_flavour()
device_image_name = get_image_name(device, flavour)
device_image_path = get_image_path(device, flavour)
deviceinfo = device.parse_deviceinfo()
sector_size = deviceinfo.flash_pagesize
if not sector_size:
raise Exception(f"Device {device.name} has no flash_pagesize specified")
if what not in FLASH_PARTS.values():
raise Exception(f'Unknown what "{what}", must be one of {", ".join(FLASH_PARTS.values())}')
if what == ROOTFS:
if location is None:
raise Exception(f'You need to specify a location to flash {what} to')
path = ''
if location.startswith("/dev/"):
path = location
else:
if location not in LOCATIONS:
raise Exception(f'Invalid location {location}. Choose one of {", ".join(LOCATIONS)}')
dir = '/dev/disk/by-id'
for file in os.listdir(dir):
sanitized_file = file.replace('-', '').replace('_', '').lower()
if f'jumpdrive{location.split("-")[0]}' in sanitized_file:
path = os.path.realpath(os.path.join(dir, file))
partprobe(path)
result = run_root_cmd(['lsblk', path, '-o', 'SIZE'], capture_output=True)
if result.returncode != 0:
raise Exception(f'Failed to lsblk {path}')
if result.stdout == b'SIZE\n 0B\n':
raise Exception(f'Disk {path} has a size of 0B. That probably means it is not available (e.g. no'
'microSD inserted or no microSD card slot installed in the device) or corrupt or defect')
if path == '':
raise Exception('Unable to discover Jumpdrive')
minimal_image_dir = get_temp_dir(register_cleanup=True)
minimal_image_path = os.path.join(minimal_image_dir, f'minimal-{device_image_name}')
shutil.copyfile(device_image_path, minimal_image_path)
loop_device = losetup_rootfs_image(minimal_image_path, sector_size)
partprobe(loop_device)
shrink_fs(loop_device, minimal_image_path, sector_size)
losetup_destroy(loop_device)
result = dd_image(input=minimal_image_path, output=path)
if result.returncode != 0:
raise Exception(f'Failed to flash {minimal_image_path} to {path}')
else:
loop_device = losetup_rootfs_image(device_image_path, sector_size)
if what == ABOOT:
path = dump_aboot(f'{loop_device}p1')
fastboot_flash('boot', path)
elif what == LK2ND:
path = dump_lk2nd(f'{loop_device}p1')
fastboot_flash('lk2nd', path)
elif what == QHYPSTUB:
path = dump_qhypstub(f'{loop_device}p1')
fastboot_flash('qhypstub', path)
else:
raise Exception(f'Unknown what "{what}", this must be a bug in kupferbootstrap!')