kupferbootstrap/image/boot.py

import os
import urllib.request
import click

from typing import Optional

from config.state import config
from constants import FLASH_PARTS, FASTBOOT, JUMPDRIVE, JUMPDRIVE_VERSION
from exec.file import makedir
from devices.device import get_profile_device
from flavours.flavour import get_profile_flavour
from flavours.cli import profile_option
from wrapper import enforce_wrap

from .fastboot import fastboot_boot, fastboot_erase
from .image import get_device_name, losetup_rootfs_image, get_image_path, dump_aboot, dump_lk2nd

LK2ND = FLASH_PARTS['LK2ND']
ABOOT = FLASH_PARTS['ABOOT']

BOOT_TYPES = [ABOOT, LK2ND, JUMPDRIVE]


@click.command(name='boot')
@profile_option
@click.argument('type', required=False, default=ABOOT, type=click.Choice(BOOT_TYPES))
@click.option('-b', '--sector-size', type=int, help="Override the device's sector size", default=None)
@click.option(
    '--erase-dtbo/--no-erase-dtbo',
    is_flag=True,
    default=True,
    show_default=True,
    help="Erase the DTBO partition before flashing",
)
@click.option('--confirm', is_flag=True, help="Ask for confirmation before executing fastboot commands")
def cmd_boot(
    type: str,
    profile: Optional[str] = None,
    sector_size: Optional[int] = None,
    erase_dtbo: bool = True,
    confirm: bool = False,
):
    """Boot JumpDrive or the Kupfer aboot image. Erases Android DTBO in the process."""
    enforce_wrap()
    device = get_profile_device(profile)
    flavour = get_profile_flavour(profile).name
    deviceinfo = device.parse_deviceinfo()
    sector_size = sector_size or device.get_image_sectorsize_default()
    if not sector_size:
        raise Exception(f"Device {device.name} has no rootfs_image_sector_size specified")
    image_path = get_image_path(device, flavour)
    strategy = deviceinfo.flash_method
    if not strategy:
        raise Exception(f"Device {device.name} has no flash strategy defined")

    if strategy == FASTBOOT:
        if type == JUMPDRIVE:
            file = f'boot-{get_device_name(device)}.img'
            path = os.path.join(config.get_path('jumpdrive'), file)
            makedir(os.path.dirname(path))
            if not os.path.exists(path):
                urllib.request.urlretrieve(f'https://github.com/dreemurrs-embedded/Jumpdrive/releases/download/{JUMPDRIVE_VERSION}/{file}', path)
        else:
            loop_device = losetup_rootfs_image(image_path, sector_size)
            if type == LK2ND:
                path = dump_lk2nd(loop_device + 'p1')
            elif type == ABOOT:
                path = dump_aboot(loop_device + 'p1')
            else:
                raise Exception(f'Unknown boot image type {type}')
        if erase_dtbo:
            fastboot_erase('dtbo', confirm=confirm)
        fastboot_boot(path, confirm=confirm)
    else:
        raise Exception(f'Unsupported flash strategy "{strategy}" for device {device.name}')