53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
"""Ratchet guard: module-level runtime state in the flag-owning layers may
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only shrink.
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Runtime flags belong on ``get_flags()`` groups, which have lifecycle reset and
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a scoped test-override primitive; a module-level ``global`` has neither and
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leaks across test teardowns. The pin below names the survivors -- migrating one
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must shrink it.
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"""
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import ast
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from pathlib import Path
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_SRT_ROOT = Path(__file__).resolve().parents[2] / "python" / "sglang" / "srt"
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_PINNED_GLOBALS = {
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"layers/moe/utils.py": frozenset(),
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"layers/dp_attention.py": frozenset(
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{
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# DP-attention topology (parallel vertical scope).
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"_ATTN_DP_RANK",
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"_ATTN_DP_SIZE",
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}
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),
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}
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def check_module_state_ratchet():
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for rel, pinned in _PINNED_GLOBALS.items():
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tree = ast.parse((_SRT_ROOT / rel).read_text())
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declared = {
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name
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for node in ast.walk(tree)
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if isinstance(node, ast.Global)
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for name in node.names
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}
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grown = declared - pinned
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if grown:
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raise AssertionError(
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f"{rel} declares new module-level runtime state {sorted(grown)}; "
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"put runtime flags on a get_flags() group instead "
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"(see runtime_context.MoeFlags / DpFlags).",
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)
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shrunk = pinned - declared
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if shrunk:
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raise AssertionError(
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f"{rel} no longer declares {sorted(shrunk)}; "
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"shrink the pin in this file to lock in the progress.",
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)
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if __name__ == "__main__":
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check_module_state_ratchet()
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