stack/tests/cli/test_cli_import_without_optional_deps.py

"""The api image installs the ``cli`` extra only (no fsspec/s3fs/obstore —
those belong to the lake/rex extras). ``stack`` must still start there:
the nightly Zotero sync and the mail poller run inside that image. On
2026-09-11 a module-level ``pfs.cpt_load → pfs.cpt_epub → rex`` import
chain made every ``stack`` invocation in the api image die with
``ModuleNotFoundError: fsspec``."""

from __future__ import annotations

import subprocess
import sys

_PROBE = """
import builtins
_real = builtins.__import__
def _fake(name, *a, **k):
    if name.split('.')[0] in {'fsspec', 's3fs', 'obstore'}:
        raise ModuleNotFoundError(name)
    return _real(name, *a, **k)
builtins.__import__ = _fake
import cli            # the `stack` entry point package
import cli.pfs, cli.bib, cli.llm
print('cli ok')
"""


def test_stack_cli_imports_without_lake_extras():
    r = subprocess.run(
        [sys.executable, "-c", _PROBE], capture_output=True, text=True, check=False
    )
    assert r.returncode == 0, r.stderr[-1200:]
    assert "cli ok" in r.stdout