feat(tidy3d): FXC-3982-support-lydrc-in-klayout-plugin

CHANGELOG.md

@@ -29,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added configurable local simulation result caching with checksum validation, eviction limits, and per-call overrides across `web.run`, `web.load`, and job workflows.
 - Added `DirectivityMonitorSpec` for automated creation and configuration of directivity radiation monitors in `TerminalComponentModeler`.
 - Added multimode support to `WavePort` in the smatrix plugin, allowing multiple modes to be analyzed per port.
+- Added support for `.lydrc` files for design rule checking in the `klayout` plugin.
 
 ### Breaking Changes
 - Edge singularity correction at PEC and lossy metal edges defaults to `True`.

tests/test_plugins/klayout/drc/test_drc.py

@@ -53,6 +53,25 @@ def good_drcrunset_content():
         report("DRC results", $resultsfile)
         """
 
+    @staticmethod
+    def wrap_drc_to_lydrc(body: str):
+        """Return the XML-wrapped .lydrc runset content."""
+        xml = f"""\
+        <?xml version="1.0" encoding="utf-8"?>
+        <klayout-macro>
+        <description>Test DRC runset</description>
+        <version/>
+        <category>drc</category>
+        <prolog/>
+        <epilog/>
+        <text>
+        {body}
+        </text>
+        </klayout-macro>
+        """
+
+        return xml
+
     @staticmethod
     @pytest.fixture(scope="class")
     def bad_drcrunset_content_source():
@@ -147,22 +166,34 @@ def mock_run_drc_on_gds(config):
         )
 
     @pytest.mark.parametrize("verbose", [True, False])
+    @pytest.mark.parametrize("drc_file_suffix", [".drc", ".lydrc"])
     def test_valid_run_on_gds(
-        self, monkeypatch, tmp_path, verbose, geom, geom_to_gds_kwargs, good_drcrunset_content
+        self,
+        monkeypatch,
+        tmp_path,
+        verbose,
+        geom,
+        geom_to_gds_kwargs,
+        good_drcrunset_content,
+        drc_file_suffix,
     ):
         """Test that no error is raised when runs on a gds are valid"""
         geom.to_gds_file(tmp_path / "test.gds", **geom_to_gds_kwargs)
-        self.write_drcrunset(tmp_path, "good_drcfile.drc", good_drcrunset_content)
+        drc_content = good_drcrunset_content
+        if drc_file_suffix == ".lydrc":
+            drc_content = TestDRCRunner.wrap_drc_to_lydrc(drc_content)
+        self.write_drcrunset(tmp_path, f"good_drcfile{drc_file_suffix}", drc_content)
         self.run(
             monkeypatch=monkeypatch,
-            drc_runsetfile=tmp_path / "good_drcfile.drc",
+            drc_runsetfile=tmp_path / f"good_drcfile{drc_file_suffix}",
             verbose=verbose,
             source=tmp_path / "test.gds",
             td_object_gds_savefile=tmp_path / "test.gds",
             resultsfile=filepath / "drc_results.lyrdb",
         )
 
     @pytest.mark.parametrize("verbose", [True, False])
+    @pytest.mark.parametrize("drc_file_suffix", [".drc", ".lydrc"])
     @pytest.mark.parametrize(
         "td_object, obj_to_gds_kwargs",
         [
@@ -180,12 +211,16 @@ def test_valid_run_on_td_object(
         td_object,
         obj_to_gds_kwargs,
         good_drcrunset_content,
+        drc_file_suffix,
     ):
         """Test that no error is raised when runs on a Geometry, Structure, or Simulation are valid"""
-        self.write_drcrunset(tmp_path, "good_drcfile.drc", good_drcrunset_content)
+        drc_content = good_drcrunset_content
+        if drc_file_suffix == ".lydrc":
+            drc_content = TestDRCRunner.wrap_drc_to_lydrc(drc_content)
+        self.write_drcrunset(tmp_path, f"good_drcfile{drc_file_suffix}", drc_content)
         self.run(
             monkeypatch=monkeypatch,
-            drc_runsetfile=tmp_path / "good_drcfile.drc",
+            drc_runsetfile=tmp_path / f"good_drcfile{drc_file_suffix}",
             verbose=verbose,
             source=request.getfixturevalue(td_object),
             td_object_gds_savefile=tmp_path / "test.gds",
@@ -196,18 +231,27 @@ def test_valid_run_on_td_object(
     @pytest.mark.parametrize(
         "bad_drcrunset_content", ["bad_drcrunset_content_source", "bad_drcrunset_content_report"]
     )
+    @pytest.mark.parametrize("drc_file_suffix", [".drc", ".lydrc"])
     def test_check_drcfile_format_invalid(
-        self, request, monkeypatch, tmp_path, geom, geom_to_gds_kwargs, bad_drcrunset_content
+        self,
+        request,
+        monkeypatch,
+        tmp_path,
+        geom,
+        geom_to_gds_kwargs,
+        bad_drcrunset_content,
+        drc_file_suffix,
     ):
         """Tests that ValidationError is raised when the drc file content is invalid"""
         geom.to_gds_file(tmp_path / "test.gds", **geom_to_gds_kwargs)
-        self.write_drcrunset(
-            tmp_path, "bad_drcrunset.drc", request.getfixturevalue(bad_drcrunset_content)
-        )
+        drc_content = request.getfixturevalue(bad_drcrunset_content)
+        if drc_file_suffix == ".lydrc":
+            drc_content = TestDRCRunner.wrap_drc_to_lydrc(drc_content)
+        self.write_drcrunset(tmp_path, f"bad_drcrunset{drc_file_suffix}", drc_content)
         with pytest.raises(pd.ValidationError) as e:
             self.run(
                 monkeypatch=monkeypatch,
-                drc_runsetfile=tmp_path / "bad_drcrunset.drc",
+                drc_runsetfile=tmp_path / f"bad_drcrunset{drc_file_suffix}",
                 verbose=True,
                 source=tmp_path / "test.gds",
                 td_object_gds_savefile=None,

tidy3d/plugins/klayout/drc/drc.py

@@ -24,6 +24,8 @@
 from tidy3d.plugins.klayout.drc.results import DRCResults
 from tidy3d.plugins.klayout.util import check_installation
 
+SUPPORTED_DRC_SUFFIXES: frozenset[str] = frozenset({".drc", ".lydrc"})
+
 
 class DRCConfig(Tidy3dBaseModel):
     """Configuration for KLayout DRC."""
@@ -54,9 +56,11 @@ def _validate_gdsfile_filetype(cls, v: pd.FilePath) -> pd.FilePath:
 
     @validator("drc_runset")
     def _validate_drc_runset_filetype(cls, v: pd.FilePath) -> pd.FilePath:
-        """Check DRC runset filetype is ``.drc``."""
-        if v.suffix != ".drc":
-            raise ValidationError(f"DRC runset file '{v}' must end with '.drc'.")
+        """Check DRC runset filetype is ``.drc`` or ``.lydrc``."""
+        if v.suffix not in SUPPORTED_DRC_SUFFIXES:
+            raise ValidationError(
+                f"DRC runset file '{v}' must end with one of {', '.join(SUPPORTED_DRC_SUFFIXES)}."
+            )
         return v
 
     @validator("drc_runset")