Re-add warnings usage in one place

yuvipanda · yuvipanda · commit 29ee4c314eae · 2024-12-20T17:20:24.000-08:00
This actually seems appropriate
diff --git a/repo2docker/utils.py b/repo2docker/utils.py
@@ -543,4 +543,5 @@ def get_platform():
         # OSX reports arm64
         return "linux/arm64"
     else:
-        raise ValueError("Unsupported platform {m}")
+        warnings.warn(f"Unexpected platform '{m}', defaulting to linux/amd64")
+        return "linux/amd64"
