171 lines
4.3 KiB
Python
171 lines
4.3 KiB
Python
import logging
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import os
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import subprocess
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import sys
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from contextlib import contextmanager
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logger = logging.getLogger(__name__)
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class CommandResult:
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def __init__(self, stdout, stderr, returncode):
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self.stdout = stdout
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self.stderr = stderr
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self.returncode = returncode
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def run_command(cmd, check=True):
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logger.info(f"Running command: {' '.join(cmd)}")
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process = subprocess.Popen(
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cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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text=True,
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bufsize=1, # Line buffered
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)
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stdout_lines = []
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stderr_lines = []
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# Helper to read stream
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def read_stream(stream, line_list, log_level):
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for line in stream:
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line_clean = line.strip()
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if line_clean:
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log_level(line_clean)
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line_list.append(line)
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import threading
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t1 = threading.Thread(
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target=read_stream, args=(process.stdout, stdout_lines, logger.info)
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)
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t2 = threading.Thread(
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target=read_stream, args=(process.stderr, stderr_lines, logger.error)
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)
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t1.start()
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t2.start()
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t1.join()
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t2.join()
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returncode = process.wait()
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stdout_str = "".join(stdout_lines)
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stderr_str = "".join(stderr_lines)
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if check and returncode != 0:
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raise subprocess.CalledProcessError(
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returncode, cmd, output=stdout_str, stderr=stderr_str
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)
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return CommandResult(stdout_str, stderr_str, returncode)
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@contextmanager
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def mount_pseudo_fs(mount_root):
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"""
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Context manager to bind mount /dev, /proc, and /sys into mount_root.
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"""
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logger.info(f"Mounting pseudo-filesystems to {mount_root}...")
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mounts = ["dev", "proc", "sys"]
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mounted_paths = []
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try:
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for fs in mounts:
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target = os.path.join(mount_root, fs)
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os.makedirs(target, exist_ok=True)
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run_command(["mount", "--bind", f"/{fs}", target])
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mounted_paths.append(target)
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yield
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finally:
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logger.info(f"Unmounting pseudo-filesystems from {mount_root}...")
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for path in reversed(mounted_paths):
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try:
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run_command(["umount", "-l", path])
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except Exception as e:
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logger.warning(f"Failed to unmount {path}: {e}")
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def install_minimal_os(mount_root, releasever="43"):
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"""
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Installs minimal Fedora packages to mount_root.
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"""
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logger.info(f"Installing minimal Fedora {releasever} to {mount_root}...")
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packages = [
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"basesystem",
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"bash",
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"coreutils",
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"kernel",
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"systemd",
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"dnf",
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"grub2-efi-x64",
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"shim-x64",
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"efibootmgr",
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"passwd",
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"rootfiles",
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"vim-minimal",
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]
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cmd = [
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"dnf",
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"install",
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"-y",
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f"--installroot={mount_root}",
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f"--releasever={releasever}",
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"--use-host-config",
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"--setopt=install_weak_deps=False",
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"--nodocs",
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] + packages
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with mount_pseudo_fs(mount_root):
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run_command(cmd)
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logger.info("Base system installation complete.")
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def configure_system(mount_root, partition_info):
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"""
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Basic configuration: fstab and grub.
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"""
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logger.info("Configuring system...")
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# 1. Generate fstab
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def get_uuid(dev):
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res = run_command(["blkid", "-s", "UUID", "-o", "value", dev])
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return res.stdout.strip()
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root_uuid = get_uuid(partition_info["root"])
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efi_uuid = get_uuid(partition_info["efi"])
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swap_entry = ""
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if partition_info.get("swap"):
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swap_uuid = get_uuid(partition_info["swap"])
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swap_entry = f"UUID={swap_uuid} none swap defaults 0 0\n"
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fstab_content = f"""
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UUID={root_uuid} / ext4 defaults 1 1
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UUID={efi_uuid} /boot/efi vfat defaults 0 2
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{swap_entry}
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"""
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os.makedirs(os.path.join(mount_root, "etc"), exist_ok=True)
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with open(os.path.join(mount_root, "etc/fstab"), "w") as f:
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f.write(fstab_content)
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# 2. Configure GRUB
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with mount_pseudo_fs(mount_root):
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# grub2-mkconfig -o /boot/grub2/grub.cfg
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chroot_cmd = [
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"chroot",
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mount_root,
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"grub2-mkconfig",
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"-o",
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"/boot/grub2/grub.cfg",
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]
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run_command(chroot_cmd)
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logger.info("System configuration complete.")
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