check if openscad is installed on system

weave_planter.py

@@ -1,12 +1,11 @@
 #!/bin/python3
 from __future__ import annotations
 
-import shutil
 import subprocess
 import sys
 from pathlib import Path
 
-from utils import ask_float
+from utils import ask_float, check_openscad
 
 
 BASE_DIR = Path(__file__).resolve().parent
@@ -58,11 +57,7 @@ def render_scad(
 
 
 def main() -> None:
-    if shutil.which("openscad") is None:
-        raise SystemExit(
-            "OpenSCAD was not found in PATH. "
-            "Install OpenSCAD or make sure the 'openscad' command is available."
-        )
+    check_openscad()
 
     scad_file = SCAD_DIR / "weave_planter.scad"