Initial Commit - Forked from PeakRDL-regblock @ a440cc19769069be831d267505da4f3789a26695

tests/lib/simulators/__init__.py

@@ -0,0 +1,39 @@
+from typing import Type, Optional, List
+import functools
+
+from .base import Simulator
+from .questa import Questa
+from .xilinx import XilinxXSIM
+from .xcelium import Xcelium
+from .stub import StubSimulator
+
+ALL_SIMULATORS: List[Simulator]
+ALL_SIMULATORS = [
+    Questa,
+    XilinxXSIM,
+    Xcelium,
+    StubSimulator,
+]
+
+@functools.lru_cache()
+def get_simulator_cls(name: str) -> Optional[Type[Simulator]]:
+    if name == "skip":
+        return None
+
+    if name == "auto":
+        # Find the first simulator that is installed
+        for sim_cls in ALL_SIMULATORS:
+            if sim_cls is StubSimulator:
+                # Never offer the stub as an automatic option
+                continue
+            if sim_cls.is_installed():
+                return sim_cls
+        raise ValueError("Could not find any installed simulators")
+
+    # Look up which explicit simulator name was specified
+    for sim_cls in ALL_SIMULATORS:
+        if sim_cls.name == name:
+            if not sim_cls.is_installed():
+                raise ValueError("Simulator '%s' is not installed" % sim_cls.name)
+            return sim_cls
+    raise RuntimeError