allow for arbitray fname overrides

hammer/tech/__init__.py

@@ -337,7 +337,11 @@ def override_tech_libraries(self) -> None:
         if self.get_setting("vlsi.technology.manually_override_pdk_collateral"):
             for lib in self.get_setting("vlsi.technology.override_libraries"):
                 for key, path in lib['library'].items():
-                    fname = os.path.basename(path)
+                    if isinstance(path, list): # path fname and fname to replace are different
+                        fname = path[1]
+                        path = path[0]
+                    else:
+                        fname = os.path.basename(path)
                     if (key, fname) in manual_overrides:
                         self.logger.error("Attempted to add {(key,path)} to overrides when {manual_overrides[(key, fname)]} already exists!")
                     manual_overrides[(key, fname)] = path

hammer/technology/sky130/defaults.yml

@@ -43,6 +43,7 @@ technology.sky130:
 # WARNING: BREAK GLASS flag to override tech collateral with the paths provided in `override_libraries`
 vlsi.technology.manually_override_pdk_collateral: false 
 vlsi.technology.override_libraries: [] # hacked collateral files to be used instead of default tech files with the same name
+# either it's key:path or key:[path,name_to_override] if the path fname is diff than the fname to override
 
 mentor.extra_env_vars_meta: lazydeepsubst # Mentor environment variables
 # Override this in project