104 lines
3.8 KiB
Python
Executable File
104 lines
3.8 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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A helper application used to start bootstrapping process.
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It has a few modes of operation, you can create initramfs with
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binary seeds and sources that you can boot into or alternatively
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you can run bootstap inside chroot.
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"""
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# SPDX-License-Identifier: GPL-3.0-or-later
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# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
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import argparse
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import glob
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import os
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import subprocess
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from sysa import SysA
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from lib.utils import run
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def main():
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"""
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A few command line arguments to customize bootstrap.
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This function also creates SysA object which prepares directory
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structure with bootstrap seeds and all sources.
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"""
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parser = argparse.ArgumentParser()
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parser.add_argument("-a", "--arch", help="Bootstrap architecture",
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default="x86")
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parser.add_argument("-c", "--chroot", help="Run inside chroot",
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action="store_true")
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parser.add_argument("-p", "--preserve", help="Do not unmount temporary dir",
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action="store_true")
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parser.add_argument("-t", "--tmpdir", help="Temporary directory")
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# QEMU arguments
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parser.add_argument("-q", "--qemu-cmd", help="QEMU command",
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default="qemu-system-x86_64")
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parser.add_argument("-r", "--qemu-ram", help="Memory (in megabytes) allocated to QEMU VM",
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default=8000)
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parser.add_argument("-k", "--kernel", help="Kernel to use (default is ./kernel)",
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default="kernel")
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parser.add_argument("-m", "--minikernel", help="Use minikernel",
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action="store_true")
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args = parser.parse_args()
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if args.chroot and args.minikernel:
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raise ValueError("chroot and minikernel options cannot be used simultaneously.")
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if args.arch != "x86":
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raise ValueError("Only x86 is supported at the moment.")
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system_a = SysA(arch=args.arch, preserve_tmp=args.preserve, tmpdir=args.tmpdir)
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initramfs_path = os.path.join(system_a.tmp_dir, "initramfs")
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if not args.chroot:
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make_initramfs(system_a.tmp_dir, initramfs_path)
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bootstrap(args, system_a.tmp_dir, initramfs_path)
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def make_initramfs(tmp_dir, initramfs_path):
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"""Package binary bootstrap seeds and sources into initramfs."""
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file_list = glob.glob(os.path.join(tmp_dir, '**'), recursive=True)
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# Use built-in removeprefix once we can use Python 3.9
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def remove_prefix(text, prefix):
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if text.startswith(prefix):
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return text[len(prefix):]
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return text # or whatever
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file_list = [remove_prefix(f, tmp_dir + os.sep) for f in file_list]
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with open(initramfs_path, "w") as initramfs:
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cpio = subprocess.Popen(["cpio", "--format", "newc", "--create", "--directory", tmp_dir],
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stdin=subprocess.PIPE, stdout=initramfs)
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cpio.communicate(input='\n'.join(file_list).encode())
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def bootstrap(args, tmp_dir, initramfs_path):
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"""Kick off bootstrap process."""
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print("Bootstrapping %s" % (args.arch))
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if args.chroot:
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init = os.path.join(os.sep, 'bootstrap-seeds', 'POSIX', args.arch, 'kaem-optional-seed')
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run('sudo', 'env', '-i', 'PATH=/bin', 'chroot', tmp_dir, init)
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return
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if args.minikernel:
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run('git', 'clone', '--depth', '1', '--branch', 'v0.4',
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'https://github.com/bittorf/kritis-linux.git')
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run('kritis-linux/ci_helper.sh', '--arch', 'x86_64', '--ramsize',
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'-m', str(args.qemu_ram) + 'M', '--kernel', '5.10.8', '--initrd', initramfs_path)
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return
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run(args.qemu_cmd,
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'-enable-kvm',
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'-m', str(args.qemu_ram) + 'M',
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'-nographic',
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'-no-reboot',
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'-kernel', args.kernel,
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'-initrd', initramfs_path,
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'-append', "console=ttyS0")
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if __name__=="__main__":
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main()
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