Allow dryrun from cli in JSON launching case (meta-pytorch#1135)

Summary:

Dryrun is a frequent flag so allow that from CLI

Reviewed By: daniel-ohayon, nghuiqin

Differential Revision: D83681938

Author: ishachirimar

torchx/cli/cmd_run.py

@@ -379,12 +379,16 @@ def _get_torchx_stdin_args(
         if not args.stdin:
             return None
         if self._stdin_data_json is None:
-            self._stdin_data_json = self.torchx_json_from_stdin()
+            self._stdin_data_json = self.torchx_json_from_stdin(args)
         return self._stdin_data_json
 
-    def torchx_json_from_stdin(self) -> Dict[str, Any]:
+    def torchx_json_from_stdin(
+        self, args: Optional[argparse.Namespace] = None
+    ) -> Dict[str, Any]:
         try:
             stdin_data_json = json.load(sys.stdin)
+            if args and args.dryrun:
+                stdin_data_json["dryrun"] = True
             if not isinstance(stdin_data_json, dict):
                 logger.error(
                     "Invalid JSON input for `torchx run` command. Expected a dictionary."
@@ -413,6 +417,8 @@ def verify_no_extra_args(self, args: argparse.Namespace) -> None:
                 continue
             if action.dest == "help":  # Skip help
                 continue
+            if action.dest == "dryrun":  # Skip dryrun
+                continue
 
             current_value = getattr(args, action.dest, None)
             default_value = action.default

torchx/cli/test/cmd_run_test.py

@@ -393,12 +393,17 @@ def test_verify_no_extra_args_stdin_with_scheduler(self) -> None:
 
     def test_verify_no_extra_args_stdin_with_boolean_flags(self) -> None:
         """Test that boolean flags conflict with stdin."""
-        boolean_flags = ["--dryrun", "--wait", "--log", "--tee_logs"]
+        boolean_flags = ["--wait", "--log", "--tee_logs"]
         for flag in boolean_flags:
             args = self.parser.parse_args(["--stdin", flag])
             with self.assertRaises(SystemExit):
                 self.cmd_run.verify_no_extra_args(args)
 
+    def test_verify_no_extra_args_stdin_dryrun_pass(self) -> None:
+        """Test that dryrun is allowed."""
+        args = self.parser.parse_args(["--stdin", "--dryrun"])
+        self.cmd_run.verify_no_extra_args(args)
+
     def test_verify_no_extra_args_stdin_with_value_args(self) -> None:
         """Test that arguments with values conflict with stdin."""
         args = self.parser.parse_args(["--stdin", "--workspace", "/custom/path"])