Extract some generated plain code into a utility code file to make it more visible and editable.

Cython/Compiler/ModuleNode.py

@@ -2312,15 +2312,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             tempdecl_code.put_trace_declarations()
             code.put_trace_frame_init()
 
-        code.putln("#if CYTHON_REFNANNY")
-        code.putln("__Pyx_RefNanny = __Pyx_RefNannyImportAPI(\"refnanny\");")
-        code.putln("if (!__Pyx_RefNanny) {")
-        code.putln("  PyErr_Clear();")
-        code.putln("  __Pyx_RefNanny = __Pyx_RefNannyImportAPI(\"Cython.Runtime.refnanny\");")
-        code.putln("  if (!__Pyx_RefNanny)")
-        code.putln("      Py_FatalError(\"failed to import 'refnanny' module\");")
-        code.putln("}")
-        code.putln("#endif")
+        refnanny_import_code = UtilityCode.load_as_string("ImportRefnannyAPI", "ModuleSetupCode.c")[1]
+        code.putln(refnanny_import_code.rstrip())
         code.put_setup_refcount_context(header3)
 
         env.use_utility_code(UtilityCode.load("CheckBinaryVersion", "ModuleSetupCode.c"))

Cython/Utility/ModuleSetupCode.c

@@ -1100,6 +1100,20 @@ end:
 }
 #endif /* CYTHON_REFNANNY */
 
+
+/////////////// ImportRefnannyAPI ///////////////
+
+#if CYTHON_REFNANNY
+__Pyx_RefNanny = __Pyx_RefNannyImportAPI("refnanny");
+if (!__Pyx_RefNanny) {
+  PyErr_Clear();
+  __Pyx_RefNanny = __Pyx_RefNannyImportAPI("Cython.Runtime.refnanny");
+  if (!__Pyx_RefNanny)
+      Py_FatalError("failed to import 'refnanny' module");
+}
+#endif
+
+
 /////////////// RegisterModuleCleanup.proto ///////////////
 //@substitute: naming