3 files changed, 45 insertions, 0 deletions
diff --git a/archinstall/lib/utils/__init__.py b/archinstall/lib/utils/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/archinstall/lib/utils/__init__.py
diff --git a/archinstall/lib/utils/singleton.py b/archinstall/lib/utils/singleton.py
new file mode 100644
index 00000000..55be70eb
--- /dev/null
+++ b/archinstall/lib/utils/singleton.py
@@ -0,0 +1,15 @@
+from typing import Dict, Any
+
+
+class _Singleton(type):
+	""" A metaclass that creates a Singleton base class when called. """
+	_instances: Dict[Any, Any] = {}
+
+	def __call__(cls, *args, **kwargs):
+		if cls not in cls._instances:
+			cls._instances[cls] = super().__call__(*args, **kwargs)
+		return cls._instances[cls]
+
+
+class Singleton(_Singleton('SingletonMeta', (object,), {})):  # type: ignore
+	pass
diff --git a/archinstall/lib/utils/util.py b/archinstall/lib/utils/util.py
new file mode 100644
index 00000000..ded480ae
--- /dev/null
+++ b/archinstall/lib/utils/util.py
@@ -0,0 +1,30 @@
+from pathlib import Path
+from typing import Any, TYPE_CHECKING, Optional
+
+from ..output import log
+
+if TYPE_CHECKING:
+	_: Any
+
+
+def prompt_dir(text: str, header: Optional[str] = None) -> Path:
+	if header:
+		print(header)
+
+	while True:
+		path = input(text).strip(' ')
+		dest_path = Path(path)
+		if dest_path.exists() and dest_path.is_dir():
+			return dest_path
+		log(_('Not a valid directory: {}').format(dest_path), fg='red')
+
+
+def is_subpath(first: Path, second: Path):
+	"""
+	Check if _first_ a subpath of _second_
+	"""
+	try:
+		first.relative_to(second)
+		return True
+	except ValueError:
+		return False