From bd26e938d3095e2425d74f7ba00ff2a17fd01bac Mon Sep 17 00:00:00 2001
From: Abishek Sethuraman <abisheksethu@meta.com>
Date: Mon, 29 Sep 2025 12:23:19 -0700
Subject: [PATCH] Make it possible for users to disable .torchxconfig (#1125)

Summary:

X-link: https://github.com/pytorch/torchx/pull/1125

So that the one below is valid and does not use any configs
```
TORCHXCONFIG="" torchx run
```

Reviewed By: kiukchung

Differential Revision: D83086473
---
 torchx/runner/config.py           | 2 ++
 torchx/runner/test/config_test.py | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/torchx/runner/config.py b/torchx/runner/config.py
index ab8e52711..2ae253b96 100644
--- a/torchx/runner/config.py
+++ b/torchx/runner/config.py
@@ -494,6 +494,8 @@ def find_configs(dirs: Optional[Iterable[str]] = None) -> List[str]:
 
     config = os.getenv(ENV_TORCHXCONFIG)
     if config is not None:
+        if not config:
+            return []
         configfile = Path(config)
         if not configfile.is_file():
             raise FileNotFoundError(
diff --git a/torchx/runner/test/config_test.py b/torchx/runner/test/config_test.py
index 6abff46fa..2c0eaa0cb 100644
--- a/torchx/runner/test/config_test.py
+++ b/torchx/runner/test/config_test.py
@@ -275,6 +275,12 @@ def test_get_configs(self) -> None:
             ),
         )
 
+    def test_no_config(self) -> None:
+        config_dir = self.tmpdir
+        with patch.dict(os.environ, {ENV_TORCHXCONFIG: str("")}):
+            configs = find_configs(dirs=[str(config_dir)])
+            self.assertEqual([], configs)
+
     def test_find_configs(self) -> None:
         config_dir = self.tmpdir
         cwd_dir = config_dir / "cwd"