From e2bd7b34054ee317a0f04674bdbbbb6609932b89 Mon Sep 17 00:00:00 2001
From: codefiles <11915375+codefiles@users.noreply.github.com>
Date: Mon, 6 Apr 2026 02:42:45 -0400
Subject: [PATCH] Remove is_subpath() and use Path.is_relative_to() (#4372)

---
 archinstall/lib/disk/device_handler.py |  3 +--
 archinstall/lib/utils/util.py          | 11 -----------
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/archinstall/lib/disk/device_handler.py b/archinstall/lib/disk/device_handler.py
index 2cf91bf8..c3c678db 100644
--- a/archinstall/lib/disk/device_handler.py
+++ b/archinstall/lib/disk/device_handler.py
@@ -36,7 +36,6 @@ from archinstall.lib.models.device import (
 )
 from archinstall.lib.models.users import Password
 from archinstall.lib.output import debug, error, info, log
-from archinstall.lib.utils.util import is_subpath
 
 
 class DeviceHandler:
@@ -563,7 +562,7 @@ class DeviceHandler:
 		for device in self.devices:
 			for part_info in device.partition_infos:
 				for mountpoint in part_info.mountpoints:
-					if is_subpath(mountpoint, base_mountpoint):
+					if mountpoint.is_relative_to(base_mountpoint):
 						path = Path(part_info.disk.device.path)
 						part_mods.setdefault(path, [])
 						part_mod = PartitionModification.from_existing_partition(part_info)
diff --git a/archinstall/lib/utils/util.py b/archinstall/lib/utils/util.py
index d75bcaa7..7db7e821 100644
--- a/archinstall/lib/utils/util.py
+++ b/archinstall/lib/utils/util.py
@@ -20,17 +20,6 @@ def generate_password(length: int = 64) -> str:
 	return ''.join(secrets.choice(haystack) for _ in range(length))
 
 
-def is_subpath(first: Path, second: Path) -> bool:
-	"""
-	Check if _first_ a subpath of _second_
-	"""
-	try:
-		first.relative_to(second)
-		return True
-	except ValueError:
-		return False
-
-
 def format_cols(items: list[str], header: str | None = None) -> str:
 	if header:
 		text = f'{header}:\n'