unsloth/tests/version_compat/_fetch.py
Daniel Han 187144d4e7
Reduce and tighten code comments and docstrings repo-wide (#6095)
Trim and tighten code comments and docstrings across the repository. Comment-only: every changed file verified code-identical to main via AST/token comparison.
2026-06-08 23:09:51 -07:00

68 lines
2.4 KiB
Python

# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2026-present the Unsloth AI Inc. team.
"""Shared helpers for the version-compat suites: fetch a file from
GitHub raw at a tag/branch, and grep for class/def/module symbols
without ast.parse so one non-importable line doesn't false-fail us.
Mirrors tests/vllm_compat/test_vllm_pinned_symbols.py.
Used by the test_*_pinned_symbols.py suites under tests/version_compat/.
"""
from __future__ import annotations
import os
import re
import urllib.error
import urllib.request
import pytest
def fetch_text(repo: str, ref: str, path: str) -> str | None:
"""Fetch a file from GitHub raw. None on 404 (caller decides if
fatal). Skips the test on transient network errors to avoid CI flake."""
url = f"https://raw.githubusercontent.com/{repo}/{ref}/{path}"
req = urllib.request.Request(url)
token = os.environ.get("GITHUB_TOKEN") or os.environ.get("GH_TOKEN")
if token:
req.add_header("Authorization", f"Bearer {token}")
try:
with urllib.request.urlopen(req, timeout = 15) as r:
return r.read().decode("utf-8", errors = "replace")
except urllib.error.HTTPError as e:
if e.code == 404:
return None
pytest.skip(f"GitHub fetch failed ({e.code}) for {url}")
except (urllib.error.URLError, TimeoutError) as e:
pytest.skip(f"GitHub fetch failed ({e}) for {url}")
def has_def(
src: str,
name: str,
kind: str = "any",
) -> bool:
"""Heuristic grep for `class Name`, `def name`, or `Name = ...` at
any indent level. Avoids ast.parse so one non-importable line doesn't
false-fail us; indented matches are accepted so class methods count too."""
if kind in ("any", "class") and re.search(
rf"^\s*class\s+{re.escape(name)}\b", src, re.MULTILINE
):
return True
if kind in ("any", "func") and re.search(
rf"^\s*(?:async\s+)?def\s+{re.escape(name)}\b", src, re.MULTILINE
):
return True
if kind == "any" and re.search(rf"^\s*{re.escape(name)}\s*[:=]", src, re.MULTILINE):
return True
return False
def first_match(repo: str, ref: str, paths: list[str]) -> tuple[str, str] | None:
"""Return (path, src) for the first existing candidate path, else
None. Useful when upstream moved a module across versions."""
for p in paths:
src = fetch_text(repo, ref, p)
if src is not None:
return (p, src)
return None