"""Regression guard for ``gpgpu-sim/setup.sh`` clone-source policy.

The script must default to the upstream URL and use a local mirror only via
the explicit ``GPGPUSIM_CLONE_SOURCE`` environment variable; no personal host
path may be hardcoded.  These checks are static (plus ``bash -n``/``--help``)
so they need neither a network nor a GPGPU-Sim checkout.
"""
import os
import subprocess
import sys
import unittest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

TOOL_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
SETUP = os.path.join(TOOL_ROOT, "gpgpu-sim", "setup.sh")
PIN = "90ec3399763d7c8512cfe7dc193473086c38ca38"
UPSTREAM_URL = "https://github.com/gpgpu-sim/gpgpu-sim_distribution.git"


class SetupShTests(unittest.TestCase):
    def test_clone_source_policy(self):
        with open(SETUP, "r", encoding="utf-8") as fh:
            text = fh.read()
        self.assertNotIn("LOCAL_SRC=", text)
        self.assertNotIn("/home/rmcore", text)
        self.assertIn("GPGPUSIM_CLONE_SOURCE", text)
        self.assertIn(UPSTREAM_URL, text)
        self.assertIn(PIN, text)  # pin enforcement stays in the script

    def test_script_syntax_and_help(self):
        result = subprocess.run(["bash", "-n", SETUP],
                                capture_output=True, text=True)
        self.assertEqual(result.returncode, 0, result.stderr)
        result = subprocess.run(["bash", SETUP, "--help"],
                                capture_output=True, text=True)
        self.assertEqual(result.returncode, 0, result.stderr)
        self.assertIn("GPGPUSIM_CLONE_SOURCE", result.stdout)
        self.assertIn("upstream URL", result.stdout)


if __name__ == "__main__":
    unittest.main()