Use the test Makefile for all examples

* Rename and move sbysrc/demo[123].sby to docs/examples/demos
    * Make them use multiple tasks for multiple engines
* Scan docs/examples for sby files for make test
* `make ci` is now `NOSKIP` by default
* Skip scripts using `verific` w/o yosys verific support
    * This does not fail even with NOSKIP set

tests/make/collect_tests.py

@@ -26,6 +26,7 @@ def collect(path):
 
 
 collect(Path("."))
+collect(Path("../docs/examples"))
 
 out_file = Path("make/rules/collect.mk")
 out_file.parent.mkdir(exist_ok=True)

tests/make/required_tools.py

@@ -36,6 +36,15 @@ if __name__ == "__main__":
         with open("make/rules/found_tools") as found_tools_file:
             found_tools = set(tool.strip() for tool in found_tools_file.readlines())
 
+        if 'verific' in required_tools:
+            result = subprocess.run(["yosys", "-qp", "read -verific"], capture_output=True)
+            if result.returncode:
+                print()
+                print(f"SKIPPING {target}: requires yosys with verific support")
+                print()
+                exit()
+            required_tools.remove('verific')
+
         missing_tools = sorted(
             f"`{tool}`" for tool in required_tools if tool not in found_tools
         )

tests/make/subdir.mk

@@ -1,15 +1,17 @@
+TESTDIR ?= ..
+
 test:
-	@$(MAKE) -C .. $(SUBDIR)/$@
+	@$(MAKE) -C $(TESTDIR) $(SUBDIR)/$@
 
 .PHONY: test refresh IMPLICIT_PHONY
 
 IMPLICIT_PHONY:
 
 refresh:
-	@$(MAKE) -C .. refresh
+	@$(MAKE) -C $(TESTDIR) refresh
 
 help:
-	@$(MAKE) -C .. help
+	@$(MAKE) -C $(TESTDIR) help
 
 %: IMPLICIT_PHONY
-	@$(MAKE) -C .. $(SUBDIR)/$@
+	@$(MAKE) -C $(TESTDIR) $(SUBDIR)/$@

tests/make/test_rules.py

@@ -56,6 +56,9 @@ with rules_file.open("w") as rules:
                 solvers.add(solver)
                 engine_solvers.add((engine, solver))
 
+        if any(line.startswith("read -verific") or line.startswith("verific") for line in info["script"]):
+            required_tools.add("verific")
+
         required_tools = sorted(required_tools)
 
         print(f".PHONY: {target}", file=rules)