253 lines
9.8 KiB
Python
Executable File
253 lines
9.8 KiB
Python
Executable File
#!/usr/bin/python3
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import sys,os,shutil
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import time
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import string
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import clize
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from clize import ArgumentError, Parameter
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import argparse
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from contextlib import *
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from pathlib import Path
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import subprocess
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import tempfile
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import parted
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from ntfs_acl import *
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my_dir = Path(__file__).parent
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# allow postprocess scripts to import our python modules, especially ntfs_acl
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os.environ['PYTHONPATH'] = f"{my_dir}:{os.environ.get('PYTHONPATH','')}"
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def is_part(pth):
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pth = Path(pth)
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if not pth.is_block_device(): raise RuntimeError("Not a block device, cannot determine partition-ness")
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sys_path = Path("/sys/class/block") / pth.name
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if not sys_path.exists(): raise RuntimeError("{sys_path} does not exist (for {pth})")
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return (sys_path / 'partition').exists()
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@contextmanager
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def with_device(pth):
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pth = Path(pth)
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if pth.is_file():
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r = subprocess.run(['losetup', '--show', '-f', '-P', pth], check=True, capture_output=True)
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dev = Path(r.stdout.decode('ascii').strip())
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if not dev.is_block_device():
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raise RuntimeError(f"Cannot find loop device {dev}")
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try:
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yield dev
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finally:
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subprocess.run(['losetup', '-d', dev])
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elif pth.is_block_device():
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time.sleep(1)
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subprocess.run(['partprobe', pth])
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time.sleep(1)
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yield pth
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else:
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raise Exception(f"'{pth}' is neither a file nor a block device")
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def ci_lookup(base, *comps, creating=False, parents=False, mkdir=False):
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"""Lookup path components case-insensitively"""
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cur = Path(base)
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for idx, comp in enumerate(comps):
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cands = [ item for item in cur.iterdir() if item.name.lower() == comp.lower() ]
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if not cands:
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if (creating or mkdir) and idx == len(comps) - 1:
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cur = cur / comp
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if mkdir:
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cur.mkdir(exist_ok=True)
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break
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elif parents and idx < len(comps) - 1:
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cur = cur / comp
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cur.mkdir()
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continue
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else:
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raise FileNotFoundError(f"'{comp}' not found case-insensitively in '{cur}'")
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elif len(cands) > 1:
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raise RuntimeError(f"Multiple case-insensitive candidates for '{comp}' in '{cur}': {cands}")
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else:
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cur = cands[0]
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return cur
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@contextmanager
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def with_iso(iso):
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with ExitStack() as es:
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dir = Path(tempfile.mkdtemp(prefix="win10_iso_"))
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es.callback(lambda: dir.rmdir())
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subprocess.run(['mount', '-o', 'loop,ro', '-t', 'udf', str(iso), str(dir)], check=True)
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es.callback(lambda: subprocess.run(['umount', dir]))
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wim = ci_lookup(dir, 'sources', 'install.wim')
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yield wim
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@contextmanager
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def with_mounted(part, *, fs='ntfs'):
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part = Path(part)
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with ExitStack() as es:
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dir = Path(tempfile.mkdtemp(prefix=f"win10_mnt_{part.name}_"))
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es.callback(lambda: dir.rmdir())
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if fs == 'ntfs':
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cmd = ['ntfs-3g', '-o', 'remove_hiberfile', str(part), dir]
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elif fs == 'fat':
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cmd = ['mount', '-t', 'vfat', str(part), dir]
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subprocess.run(cmd, check=True)
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es.callback(lambda: subprocess.run(['umount', dir]))
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yield dir
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ESP_SIZE = 300 # MiB
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def create_partitions(dev, *, efi=False):
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with open(dev, 'r+b') as fh:
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fh.write(bytearray(1024*1024)) # clear MBR and other metadata
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device = parted.Device(str(dev))
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if efi:
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ptype = 'gpt'
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esp_sec = parted.sizeToSectors(ESP_SIZE, "MiB", device.sectorSize)
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end_pad = parted.sizeToSectors(1, "MiB", device.sectorSize) # leave space for secondary part table at the end
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extra_space = esp_sec + end_pad
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else:
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ptype = 'msdos'
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extra_space = 0
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disk = parted.freshDisk(device, ptype)
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start = parted.sizeToSectors(1, "MiB", device.sectorSize)
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geometry = parted.Geometry(device=device, start=start,
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length=device.getLength() - start - extra_space)
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filesystem = parted.FileSystem(type='ntfs', geometry=geometry)
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partition = parted.Partition(disk=disk, type=parted.PARTITION_NORMAL,
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fs=filesystem, geometry=geometry)
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disk.addPartition(partition=partition,
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constraint=device.optimalAlignedConstraint)
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if not efi:
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partition.setFlag(parted.PARTITION_BOOT)
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if efi: # create ESP
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geometry = parted.Geometry(device=device, start=device.getLength() - esp_sec - end_pad,
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length=esp_sec)
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filesystem = parted.FileSystem(type='fat32', geometry=geometry)
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partition = parted.Partition(disk=disk, type=parted.PARTITION_NORMAL,
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fs=filesystem, geometry=geometry)
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disk.addPartition(partition=partition,
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constraint=device.optimalAlignedConstraint)
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partition.setFlag(parted.PARTITION_BOOT)
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disk.commit()
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def part_path(dev, partno):
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dev = Path(dev)
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return dev.parent / f"{dev.name}{'p' if dev.name[-1] in string.digits else ''}{partno}"
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def format_part(part):
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cmd = ['mkntfs', '-vv', '-f', '-S', '63', '-H', '255', '--partition-start', '2048', str(part)]
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subprocess.run(cmd, check=True)
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def apply_wim(part, wim, image_name):
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subprocess.run(['wimapply', str(wim), str(image_name), str(part)], check=True)
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def setup_vbr(part):
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subprocess.run(['ms-sys', '-f', '--ntfs', str(part)], check=True)
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def setup_mbr(disk):
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subprocess.run(['ms-sys', '-f', '--mbr7', str(disk)], check=True)
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def copy_boot_files(dir):
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shutil.copy(ci_lookup(dir, 'Windows', 'Boot', 'PCAT', 'bootmgr'), ci_lookup(dir, 'bootmgr', creating=True))
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boot_dir = ci_lookup(dir, 'Boot', creating=True)
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boot_dir.mkdir(exist_ok=True)
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shutil.copy(Path(__file__).parent / 'BCD', ci_lookup(boot_dir, 'BCD', creating=True))
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def copy_efi_files(win_mnt, esp_mnt):
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efi_boot = ci_lookup(esp_mnt, 'EFI', 'Boot', mkdir=True, parents=True)
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efi_ms = ci_lookup(esp_mnt, 'EFI', 'Microsoft', mkdir=True, parents=True)
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efi_ms_boot = ci_lookup(efi_ms, 'Boot', mkdir=True)
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efi_ms_boot_res = ci_lookup(efi_ms_boot, 'Resources', mkdir=True)
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efi_ms_boot_fonts = ci_lookup(efi_ms_boot, 'Fonts', mkdir=True)
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efi_ms_recovery = ci_lookup(efi_ms, 'Recovery', mkdir=True)
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win_boot = ci_lookup(win_mnt, 'Windows', 'Boot')
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win_boot_efi = ci_lookup(win_boot, 'EFI')
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win_boot_res = ci_lookup(win_boot, 'Resources')
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win_boot_fonts = ci_lookup(win_boot, 'Fonts')
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bootmgfw = ci_lookup(win_boot_efi, 'bootmgfw.efi')
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bootx64 = ci_lookup(efi_boot, 'bootx64.efi', creating=True)
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shutil.copy(bootmgfw, bootx64)
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shutil.copytree(win_boot_efi, efi_ms_boot, dirs_exist_ok=True)
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shutil.copytree(win_boot_res, efi_ms_boot_res, dirs_exist_ok=True)
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shutil.copytree(win_boot_fonts, efi_ms_boot_fonts, dirs_exist_ok=True)
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shutil.copy(Path(__file__).parent / 'BCD-efi', ci_lookup(efi_ms_boot, 'BCD', creating=True))
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def setup_part(part, wim, image_name, *, unattend=None, postproc=None, postproc_only=False):
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if not postproc_only:
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format_part(part)
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apply_wim(part, wim, image_name)
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setup_vbr(part)
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with with_mounted(part) as dir:
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copy_boot_files(dir)
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if unattend:
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trg = ci_lookup(dir, 'Windows', 'Panther', 'unattend.xml', creating=True, parents=True)
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print(f"Copying unattend file: {unattend} -> {trg}")
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shutil.copy(unattend, trg)
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# Unattend.xml may contain sensitive information, including administrator's
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# password. We must protect it with correct ACLs.
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write_sd(
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trg,
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SecurityDescriptor(dacl=[
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ACE(ACE.ALLOW, MASK_FULL_CONTROL, SID_SYSTEM),
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ACE(ACE.ALLOW, MASK_FULL_CONTROL, SID_ADMINISTRATORS) ,
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], dacl_inherit=False),
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)
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for script in postproc:
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script = str(script)
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if '/' not in script: script = f"./{script}"
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print("Running script", script, file=sys.stderr)
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subprocess.run([str(script), dir], check=True)
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def exactly_one(*a):
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return sum( bool(x) for x in a ) == 1
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def main(*, disk=None, part=None, wim=None, iso=None, image_name=None, unattend=None,
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postproc:(str,clize.parameters.multi())=[], openssh_server=False,
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debloat=False, postproc_only=False, efi=False):
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if not exactly_one(disk, part):
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raise ArgumentError("You must specify exactly one of 'disk', 'part'")
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if not (exactly_one(wim, iso) or postproc_only):
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raise ArgumentError("You must specify exactly one of 'wim', 'iso'")
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if openssh_server:
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postproc.append(my_dir / 'postproc/openssh-server/setup.sh')
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if debloat:
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postproc.append(my_dir / 'postproc/debloat/setup.sh')
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with ExitStack() as es:
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if iso:
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wim = es.enter_context(with_iso(iso))
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if disk:
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if not postproc_only: create_partitions(disk, efi=efi)
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with with_device(disk) as dev:
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#create_partitions(dev)
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if not postproc_only and not efi: setup_mbr(dev)
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part = part_path(dev, 1)
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if efi: esp = part_path(dev, 2)
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if efi and not postproc_only: # format ESP
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subprocess.run(['mkfs.fat', '-F32', '-n', 'ESP', str(esp)], check=True)
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setup_part(part, wim, image_name, unattend=unattend, postproc=postproc, postproc_only=postproc_only)
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if efi: # copy EFI boot files
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with with_mounted(part) as win_mnt, with_mounted(esp, fs='fat') as esp_mnt:
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copy_efi_files(win_mnt, esp_mnt)
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else:
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setup_part(part, unattend=unattend, postproc=postproc, postproc_only=postproc_only)
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if __name__ == '__main__':
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clize.run(main)
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