Fix FileNotFoundError with absolute path templates

Summary:
Fixed a bug where the tritonparse reproducer failed with `FileNotFoundError` when the template parameter was passed as an absolute file path instead of a template name.

The issue was in `determine_output_paths()` which naively replaced all dots in the template string with underscores to create the output filename. When template was an absolute path like `/data/users/.../template_bento.py`, this resulted in an invalid nested path structure.

The fix extracts just the filename stem (without extension) when the template parameter contains path separators, making the function work correctly with both template names and absolute paths.

Reviewed By: FindHao

Differential Revision: D87023078

fbshipit-source-id: aad8c7d2f869f2f5fdc479804eac6229ebff7906

Author: wychi

tritonparse/reproducer/utils.py

@@ -333,6 +333,7 @@ def determine_output_paths(out_dir: str, kernel_name: str, template: str):
     Args:
         out_dir: Output directory path. If empty, uses default location.
         kernel_name: Name of the kernel for default directory naming.
+        template: Template name or path. If a path, extracts the filename.
 
     Returns:
         Tuple of (python_script_path, json_context_path) as Path objects.
@@ -341,9 +342,14 @@ def determine_output_paths(out_dir: str, kernel_name: str, template: str):
     output_directory = Path(out_dir) / kernel_name
     output_directory.mkdir(parents=True, exist_ok=True)
 
+    # Extract template name from path if needed
+    template_name = (
+        Path(template).stem if "/" in template or "\\" in template else template
+    )
+
     filename_parts = ["repro"]
     if template != "example":
-        filename_parts.append(template.replace(".", "_"))
+        filename_parts.append(template_name)
     filename_parts.append(timestamp)
     filename = "_".join(filename_parts) + ".py"
     out_py_path = output_directory / filename