Add sglang sglang check env compiler no shell

[ghangz]

Summary

• Adds a focused sglang check env compiler no shell improvement for MetaX-MACA/sglang.
• The change targets MetaX MACA development and validation workflows, with emphasis on earlier diagnostics, reproducible logs, or safer benchmark tooling.
• Existing default behavior is kept compatible; the new logic is scoped to explicit checks, helper tools, or validation metadata.

Validation

• Verified on Gitee.AI MetaX GPU resources: sglang_SGLang image batch, 12/12 PASS; PyTorch-MACA batch also covered SGLang tooling.
• Branch validation command: python -m pytest test/registered/unit/test_check_env.py
• Pull request text is intentionally ASCII-only to avoid encoding issues on web forms and API clients.

Review notes

• Source branch: ghangz:mengz/sglang-check-env-compiler-no-shell
• Target branch: MetaX-MACA/sglang:main
• Maintainers can modify this branch if follow-up adjustments are needed.

[gemini-code-assist]

Code Review

This pull request refactors the environment check in python/sglang/check_env.py by removing shell=True from subprocess.check_output calls for nvcc and hipcc, passing arguments as lists instead, and adds corresponding unit tests. The reviewer noted that removing shell=True can cause FileNotFoundError (an OSError) to be raised if the binaries are missing. Since the outer try-except blocks only catch subprocess.SubprocessError, this could lead to uncaught exceptions and crashes. The reviewer suggested wrapping these subprocess calls in nested try-except blocks to catch OSError and return 'Not Available' gracefully.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.

[gemini-code-assist]

By removing shell=True, if the nvcc binary does not exist at the specified path, subprocess.check_output will raise a FileNotFoundError (which inherits from OSError). Since the surrounding except block only catches subprocess.SubprocessError, this FileNotFoundError will go uncaught and crash the environment check. To prevent this, we should wrap the call in a nested try-except block to catch OSError and return "Not Available" gracefully.

            try:
                nvcc_output = subprocess.check_output([nvcc, "-V"], text=True).strip()
            except OSError:
                return {"NVCC": "Not Available"}

[gemini-code-assist]

By removing shell=True, if the hipcc binary does not exist at the specified path, subprocess.check_output will raise a FileNotFoundError (which inherits from OSError). Since the surrounding except block only catches subprocess.SubprocessError, this FileNotFoundError will go uncaught and crash the environment check. To prevent this, we should wrap the call in a nested try-except block to catch OSError and return "Not Available" gracefully.

            try:
                hipcc_output = subprocess.check_output([hipcc, "--version"], text=True).strip()
            except OSError:
                return {"HIPCC": "Not Available"}