btor2aiger: Install btor2aig_yw

Install alongside SBY.
Add env helper to python source.
Fix hardcoded path in `sby_core.py`.

Makefile

@@ -44,6 +44,8 @@ else
 	sed 's|##yosys-sys-path##|sys.path += [os.path.dirname(__file__) + p for p in ["/share/python3", "/../share/yosys/python3"]]|;' < sbysrc/sby.py > $(DESTDIR)$(PREFIX)/bin/sby
 	chmod +x $(DESTDIR)$(PREFIX)/bin/sby
 endif
+	cp tools/btor2aig_yw/btor2aig_yw.py $(DESTDIR)$(PREFIX)/bin/btor2aig_yw
+	chmod +x $(DESTDIR)$(PREFIX)/bin/btor2aig_yw
 
 .PHONY: check_cad_suite run_ci
 

sbysrc/sby_core.py

@@ -1154,14 +1154,12 @@ def instance_hierarchy_error_callback(retcode):
             return [proc]
 
         if model_name == "aig" and self.opt_btor_aig:
-            #TODO: aiw2yw doesn't know what to do with the latches
             btor_model = "btor_nomem"
             proc = SbyProc(
                 self,
                 "btor_aig",
                 self.model(btor_model),
-                #TODO: fix hardcoded path
-                f"cd {self.workdir}/model; python3 ~/sby/tools/btor2aig_yw/btor2aig_yw.py design_{btor_model}.btor"
+                f"cd {self.workdir}/model; btor2aig_yw design_{btor_model}.btor"
             )
             proc.checkretcode = True
 

tools/btor2aig_yw/btor2aig_yw.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import argparse