cli (call): set recording file descriptor when stdout is redirected.

libervia/cli/cmd_call.py

@@ -100,6 +100,9 @@ class Common(base.CommandBase):
             kwargs["sources_data"] = SourcesTest()
         elif self.args.sources == "auto" and not sys.stdin.isatty():
             kwargs["sources_data"] = SourcesStdin()
+
+        if not sys.stdout.isatty():
+            kwargs["record_fd"] = 1
         return kwargs
 
     async def start(self):