fix(test): v0.53.7 CI hardening — importorskip(fastapi) + Arrow target setup

CI run 25805598433 failed across all 9 OS×Python cells:
- TestToolEndpointsLive / TestAnthropicMessagesStreaming /
  TestReviewFixesVllmAnthropicLive ModuleNotFoundError: fastapi (CI does
  not install [serve] extra) → autouse fixture pytest.importorskip()
- test_load_pretokenized_dataset_rejects_symlink:
  load_pretokenized_dataset called datasets.load_from_disk on the symlink
  target before the lstat check ran → moved the lstat + S_ISLNK check
  to the entry of the helper so symlinks reject before any load attempt
- test_redact_exc_message_handles_windows_paths: hardened _redact_exc_message
  to strip both POSIX absolute paths and Windows-style paths regardless
  of host platform

Local pytest tests/test_v0537.py: 112 passed, 7 skipped.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

soup_cli/utils/data_pipeline.py

@@ -488,8 +488,10 @@ def load_pretokenized_dataset(
     real = os.path.realpath(tokenized_path)
     if not is_under_cwd(real):
         raise ValueError("tokenized_path must stay under cwd")
+    # Lstat the ORIGINAL (unresolved) path to detect symlinks at the entry
+    # point — mirrors v0.33.0 #22 / v0.43.0 Part C TOCTOU policy.
     try:
-        lst = os.lstat(real)
+        lst = os.lstat(tokenized_path)
     except OSError as exc:
         raise ValueError(f"tokenized_path not found: {tokenized_path!r}") from exc
     if _stat.S_ISLNK(lst.st_mode):

soup_cli/utils/recipe_run.py

@@ -164,12 +164,17 @@ def _redact_exc_message(exc: BaseException, limit: int = 256) -> str:
         lambda m: os.path.basename(m.group(0)) or m.group(0),
         msg,
     )
-    # Windows drive-letter paths (``C:\\foo\\bar``).
-    msg = re.sub(
-        r"[A-Za-z]:[\\/][^\s:'\"]+",
-        lambda m: os.path.basename(m.group(0)) or m.group(0),
-        msg,
-    )
+    # Windows drive-letter paths (``C:\\foo\\bar`` or ``C:/foo/bar``).
+    # Use a cross-platform basename: split on both ``/`` and ``\\`` so this
+    # works on POSIX hosts too (``os.path.basename`` only splits on ``/``
+    # on POSIX, leaving ``\\``-separated components intact).
+    def _win_basename(m: "re.Match[str]") -> str:
+        raw = m.group(0)
+        # Split on either separator; last non-empty component is the basename.
+        parts = [p for p in re.split(r"[/\\]", raw) if p]
+        return parts[-1] if parts else raw
+
+    msg = re.sub(r"[A-Za-z]:[\\/][^\s:'\"]+", _win_basename, msg)
     return msg[:limit]
 
 

tests/test_v0537.py

@@ -891,6 +891,11 @@ def _create_test_app():
 
 
 class TestToolEndpointsLive:
+    @pytest.fixture(autouse=True)
+    def _require_fastapi(self):
+        pytest.importorskip("fastapi")
+        pytest.importorskip("httpx")
+
     def test_python_tool_runs_simple_code(self):
         from fastapi.testclient import TestClient
         app = _create_test_app()
@@ -1041,6 +1046,11 @@ class TestToolEndpointsLive:
 
 
 class TestAnthropicMessagesStreaming:
+    @pytest.fixture(autouse=True)
+    def _require_fastapi(self):
+        pytest.importorskip("fastapi")
+        pytest.importorskip("httpx")
+
     def test_stream_true_returns_sse(self):
         from fastapi.testclient import TestClient
 
@@ -1425,6 +1435,11 @@ class TestReviewFixesForge:
 class TestReviewFixesVllmAnthropicLive:
     """v0.53.7 H-I + M-Q: live route tests with mocked AsyncLLMEngine."""
 
+    @pytest.fixture(autouse=True)
+    def _require_fastapi(self):
+        pytest.importorskip("fastapi")
+        pytest.importorskip("httpx")
+
     def _build_vllm_app(self):
         try:
             import fastapi  # noqa: F401