Implement minimal OS and Bootloader installation logic

2026-02-03 16:28:55 +01:00
parent 3c4870b104
commit 2377b0269a
3 changed files with 157 additions and 9 deletions
--- a/iridium_installer/backend/os_install.py
+++ b/iridium_installer/backend/os_install.py
@@ -0,0 +1,97 @@
+import subprocess
+import logging
+import os
+
+logger = logging.getLogger(__name__)
+
+def run_command(cmd, check=True):
+    logger.info(f"Running command: {' '.join(cmd)}")
+    try:
+        result = subprocess.run(cmd, check=check, capture_output=True, text=True)
+        return result
+    except subprocess.CalledProcessError as e:
+        logger.error(f"Command failed: {e.stderr}")
+        raise
+
+def install_minimal_os(mount_root, releasever="41"):
+    """
+    Installs minimal Fedora packages to mount_root.
+    """
+    logger.info(f"Installing minimal Fedora {releasever} to {mount_root}...")
+    
+    packages = [
+        "basesystem",
+        "bash",
+        "coreutils",
+        "kernel",
+        "systemd",
+        "dnf",
+        "grub2-efi-x64",
+        "shim-x64",
+        "efibootmgr",
+        "passwd",
+        "rootfiles",
+        "vim-minimal"
+    ]
+    
+    # Fedora 41 (or whatever is current)
+    # We use --releasever to ensure dnf knows which version to fetch
+    cmd = [
+        "dnf", "install", "-y",
+        f"--installroot={mount_root}",
+        f"--releasever={releasever}",
+        "--setopt=install_weak_deps=False",
+        "--nodocs"
+    ] + packages
+    
+    run_command(cmd)
+    logger.info("Base system installation complete.")
+
+def configure_system(mount_root, partition_info):
+    """
+    Basic configuration: fstab and grub.
+    """
+    logger.info("Configuring system...")
+    
+    # 1. Generate fstab
+    # We can get UUIDs using blkid
+    def get_uuid(dev):
+        res = run_command(["blkid", "-s", "UUID", "-o", "value", dev])
+        return res.stdout.strip()
+
+    root_uuid = get_uuid(partition_info["root"])
+    efi_uuid = get_uuid(partition_info["efi"])
+    swap_uuid = get_uuid(partition_info["swap"])
+
+    fstab_content = f"""
+UUID={root_uuid} / ext4 defaults 1 1
+UUID={efi_uuid} /boot/efi vfat defaults 0 2
+UUID={swap_uuid} none swap defaults 0 0
+"""
+    with open(os.path.join(mount_root, "etc/fstab"), "w") as f:
+        f.write(fstab_content)
+    
+    # 2. Configure GRUB
+    # This is tricky because we need to chroot or use --boot-directory
+    # Simplest for "barely bootable shell" is to try running grub2-mkconfig inside chroot
+    
+    # Need to bind mount dev, proc, sys for chroot
+    for dev in ["dev", "proc", "sys"]:
+        target = os.path.join(mount_root, dev)
+        run_command(["mount", "--bind", f"/{dev}", target])
+    
+    try:
+        # grub2-mkconfig -o /boot/grub2/grub.cfg (or wherever Fedora puts it)
+        # On UEFI Fedora: /boot/efi/EFI/fedora/grub.cfg usually just redirects to /boot/grub2/grub.cfg
+        # Let's just do both or standard one.
+        chroot_cmd = ["chroot", mount_root, "grub2-mkconfig", "-o", "/boot/grub2/grub.cfg"]
+        run_command(chroot_cmd)
+        
+        # Also need to make sure EFI boot entry is there, but shim/grub2 packages usually handle it in %post?
+        # Maybe not in --installroot.
+    finally:
+        # Unmount binds
+        for dev in ["sys", "proc", "dev"]:
+            run_command(["umount", os.path.join(mount_root, dev)])
+
+    logger.info("System configuration complete.")