Phase out default_drc_runset

- Modify `export_drc` attribute of `MaskSet` to be a string specifying the DRC file instead of boolean.

- Remove `default_drc_runset` from `defaults.py`.

klayout_package/python/kqcircuits/defaults.py

@@ -96,8 +96,6 @@
 default_junction_test_pads_type = "Junction Test Pads Simple"
 default_tsv_type = "Tsv Standard"
 
-default_drc_runset = "example.lydrc"
-
 # Default list of Elements to break down before netlist export.
 default_netlist_breakdown = [
     "Waveguide Composite",

klayout_package/python/kqcircuits/masks/mask_export.py

@@ -133,7 +133,7 @@ def export_chip(chip_cell, chip_name, chip_dir, layout, export_drc, alt_netlists
 
         # export drc report for the chip
         if export_drc:
-            export_drc_report(chip_name, chip_dir)
+            export_drc_report(chip_name, chip_dir, export_drc)
 
     # delete the static cell which was only needed for export
     if static_cell.cell_index() != chip_cell.cell_index():

klayout_package/python/kqcircuits/masks/mask_set.py

@@ -62,7 +62,7 @@ class MaskSet:
         name: Name of the mask set
         version: Version of the mask set
         with_grid: Boolean determining if ground grid is generated
-        export_drc: Boolean determining if DRC report is exported
+        export_drc: String specifying the DRC file used for exporting the report. Use empty string to ignore DRC report.
         chips_map_legend: Dictionary where keys are chip names, values are chip cells
         mask_layouts: list of MaskLayout objects in this mask set
         mask_export_layers: list of names of the layers which are exported for each MaskLayout
@@ -76,7 +76,7 @@ def __init__(
         name="MaskSet",
         version=1,
         with_grid=False,
-        export_drc=False,
+        export_drc="",
         mask_export_layers=None,
         export_path=TMP_PATH,
         add_mask_name_to_chips=False,

klayout_package/python/kqcircuits/util/export_helper.py

@@ -35,7 +35,6 @@
     default_probe_suffixes,
     recommended_probe_suffix_mapping,
     VERSION_PATHS,
-    default_drc_runset,
     DRC_PATH,
 )
 from kqcircuits.klayout_view import KLayoutView, MissingUILibraryException
@@ -452,7 +451,7 @@ def get_klayout_version():
         return pya.Application.instance().version()
 
 
-def export_drc_report(name, path, drc_script=default_drc_runset):
+def export_drc_report(name, path, drc_script):
     """Run a DRC script on ``path/name.oas`` and export results in ``path/name_drc_report.lyrdb``."""
 
     drc_runset_path = os.path.join(DRC_PATH, drc_script)