98 lines
3.0 KiB
Python
98 lines
3.0 KiB
Python
import subprocess
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import logging
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import os
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logger = logging.getLogger(__name__)
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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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try:
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result = subprocess.run(cmd, check=check, capture_output=True, text=True)
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return result
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except subprocess.CalledProcessError as e:
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logger.error(f"Command failed: {e.stderr}")
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raise
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def install_minimal_os(mount_root, releasever="41"):
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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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# Fedora 41 (or whatever is current)
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# We use --releasever to ensure dnf knows which version to fetch
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cmd = [
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"dnf", "install", "-y",
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f"--installroot={mount_root}",
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f"--releasever={releasever}",
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"--setopt=install_weak_deps=False",
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"--nodocs"
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] + packages
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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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# We can get UUIDs using blkid
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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_uuid = get_uuid(partition_info["swap"])
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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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UUID={swap_uuid} none swap defaults 0 0
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"""
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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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# This is tricky because we need to chroot or use --boot-directory
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# Simplest for "barely bootable shell" is to try running grub2-mkconfig inside chroot
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# Need to bind mount dev, proc, sys for chroot
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for dev in ["dev", "proc", "sys"]:
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target = os.path.join(mount_root, dev)
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run_command(["mount", "--bind", f"/{dev}", target])
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try:
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# grub2-mkconfig -o /boot/grub2/grub.cfg (or wherever Fedora puts it)
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# On UEFI Fedora: /boot/efi/EFI/fedora/grub.cfg usually just redirects to /boot/grub2/grub.cfg
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# Let's just do both or standard one.
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chroot_cmd = ["chroot", mount_root, "grub2-mkconfig", "-o", "/boot/grub2/grub.cfg"]
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run_command(chroot_cmd)
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# Also need to make sure EFI boot entry is there, but shim/grub2 packages usually handle it in %post?
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# Maybe not in --installroot.
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finally:
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# Unmount binds
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for dev in ["sys", "proc", "dev"]:
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run_command(["umount", os.path.join(mount_root, dev)])
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logger.info("System configuration complete.")
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