test: add entry-point smoke tests

tests/smoke/test_entrypoints.py

@@ -0,0 +1,30 @@
+"""Smoke tests: the console entry points load and respond to --help without the
+GPU stack (torch is imported lazily inside the training/eval code paths)."""
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+SRC = ROOT / "src"
+POSIX_SRC = ROOT.parent / "posix-sdc" / "src"
+
+
+def _help(module: str) -> "subprocess.CompletedProcess[str]":
+    env = dict(os.environ, PYTHONPATH=os.pathsep.join([str(SRC), str(POSIX_SRC)]))
+    return subprocess.run([sys.executable, "-m", module, "--help"],
+                          capture_output=True, text=True, env=env)
+
+
+def test_train_help() -> None:
+    cp = _help("tiararodney.sekft.sft")
+    assert cp.returncode == 0, cp.stderr
+    assert "--data" in cp.stdout
+
+
+def test_eval_help() -> None:
+    cp = _help("tiararodney.sekft.eval")
+    assert cp.returncode == 0, cp.stderr
+    assert "--adapter" in cp.stdout