Support latest ansys electronic executable

Use find_ansys_executable to detect ansys executable on the current
system looking from default installation locations.

Uses latest windows default installation location if Ansys is not found
on current machine. This is useful if external simulation machine is used.

klayout_package/python/kqcircuits/defaults.py

@@ -25,6 +25,7 @@
 from pathlib import Path
 
 from kqcircuits.pya_resolver import pya
+from kqcircuits.util.defaults_helper import find_ansys_executable
 from kqcircuits.util.import_helper import module_from_file
 
 
@@ -52,8 +53,7 @@
 
 TMP_PATH.mkdir(parents=True, exist_ok=True)  # TODO move elsewhere?
 
-ANSYS_EXECUTABLE = r"%PROGRAMFILES%\AnsysEM\v232\Win64\ansysedt.exe"  # default Ansys executable location in Windows
-# ANSYS_EXECUTABLE = "/opt/AnsysEM/v232/Linux64/ansysedt"  # default Ansys executable location in Linux
+ANSYS_EXECUTABLE = find_ansys_executable(r"%PROGRAMFILES%\AnsysEM\v241\Win64\ansysedt.exe")
 ANSYS_SCRIPT_PATHS = [SCRIPTS_PATH.joinpath("simulations").joinpath("ansys")]
 ELMER_SCRIPT_PATHS = [SCRIPTS_PATH.joinpath("simulations").joinpath("elmer")]
 XSECTION_PROCESS_PATH = ROOT_PATH.joinpath("xsection/kqc_process.xs")

klayout_package/python/kqcircuits/util/defaults_helper.py

@@ -0,0 +1,34 @@
+# This code is part of KQCircuits
+# Copyright (C) 2024 IQM Finland Oy
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
+# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with this program. If not, see
+# https://www.gnu.org/licenses/gpl-3.0.html.
+#
+# The software distribution should follow IQM trademark policy for open-source software
+# (meetiqm.com/developers/osstmpolicy). IQM welcomes contributions to the code. Please see our contribution agreements
+# for individuals (meetiqm.com/developers/clas/individual) and organizations (meetiqm.com/developers/clas/organization).
+
+import os
+from pathlib import Path
+
+
+def find_ansys_executable(default):
+    """Finds latest Ansys Electronics executable from default installation locations. Returns 'default' if not found.
+    """
+    paths = [(Path(os.environ.get("ProgramFiles", r"C:\Program Files")).joinpath("AnsysEM"), r"Win64\ansysedt.exe"),
+             (Path("/opt/AnsysEM"), "Linux64/ansysedt")]
+    for root, exe in paths:
+        if os.path.isdir(root):
+            versions = sorted([f for f in os.listdir(root) if f.startswith("v")], reverse=True)
+            for version in versions:
+                executable = root.joinpath(version).joinpath(exe)
+                if os.path.isfile(executable):
+                    return executable
+    return default