Fix rsync /boot failure on UEFI by using FAT-safe sync flags

iridium_installer/backend/os_install.py

@@ -131,6 +131,8 @@ def install_minimal_os(mount_root, releasever="43"):
     logger.info(f"Installing Iridium OS to {mount_root} via rsync...")
     log_os_install("INSTALL", "start", f"Target: {mount_root}")
 
+    uefi = is_uefi()
+
     # Exclude list for rsync to avoid copying pseudo-filesystems and temporary data
     excludes = [
         "/dev/*",
@@ -148,19 +150,37 @@ def install_minimal_os(mount_root, releasever="43"):
         "/var/cache/dnf/*",
         "/etc/fstab",
         "/etc/hostname",
+        "/boot/*", # We handle boot separately
         # Avoid copying the installer data itself if it's in home
         "domek_na_skale",
     ]
 
     exclude_args = [f"--exclude={ex}" for ex in excludes]
     
+    # 1. Main Root Sync
     # We use -a (archive), -H (hard links), -A (acls), -X (xattrs), -v (verbose), -x (one file system)
     # --info=progress2 gives a nice summary for logging
     cmd = ["rsync", "-aHAXvx", "--info=progress2"] + exclude_args + ["/", mount_root]
 
-    logger.info("Starting rsync operation...")
+    logger.info("Starting main rsync operation...")
     run_command(cmd)
 
+    # 2. Boot Sync
+    # If UEFI, /boot is likely FAT32 which doesn't support symlinks or xattrs
+    logger.info(f"Syncing /boot (UEFI: {uefi})...")
+    boot_dst = os.path.join(mount_root, "boot/")
+    os.makedirs(boot_dst, exist_ok=True)
+    
+    if uefi:
+        # FAT32 friendly: follow links (-L), recursive (-r), preserve times (-t)
+        # We skip ACLs, xattrs, and hardlinks as they are not supported
+        boot_cmd = ["rsync", "-rtvL", "--info=progress2", "/boot/", boot_dst]
+    else:
+        # BIOS (ext4): standard archive is fine
+        boot_cmd = ["rsync", "-aHAXvx", "--info=progress2", "/boot/", boot_dst]
+    
+    run_command(boot_cmd)
+
     # Ensure essential directories exist
     for d in ["dev", "proc", "sys", "run", "mnt", "tmp"]:
         os.makedirs(os.path.join(mount_root, d), exist_ok=True)