refactor: convert script to automtu package with CI workflow

https://chatgpt.com/share/697112b2-0410-800f-93ff-9372b603d43f

tests/unit/test_wg.py

@@ -0,0 +1,58 @@
+import unittest
+from unittest.mock import patch
+
+import automtu.wg as wg
+
+
+class TestWg(unittest.TestCase):
+    def test_wg_peer_endpoints_from_wg_show(self) -> None:
+        # wg show wg0 endpoints output
+        out = "abcde12345\t46.4.224.77:51820\nfffff00000\t[2a01:db8::1]:51820\n"
+
+        with (
+            patch(
+                "automtu.wg._run",
+                side_effect=lambda cmd: out if cmd[:3] == ["wg", "show", "wg0"] else "",
+            ),
+            patch("automtu.wg.iface_exists", return_value=True),
+            patch("automtu.wg._rc", return_value=0),
+        ):
+            eps = wg.wg_peer_endpoints("wg0")
+
+        self.assertEqual(eps, ["46.4.224.77", "2a01:db8::1"])
+
+    def test_wg_peer_endpoints_fallback_showconf(self) -> None:
+        show_endpoints_empty = ""
+        showconf = (
+            "[Interface]\n"
+            "PrivateKey = x\n"
+            "[Peer]\n"
+            "Endpoint = 46.4.224.77:51820\n"
+            "[Peer]\n"
+            "Endpoint = [2a01:db8::1]:51820\n"
+        )
+
+        def fake_run(cmd: list[str]) -> str:
+            if cmd == ["wg", "show", "wg0", "endpoints"]:
+                return show_endpoints_empty
+            if cmd == ["wg", "showconf", "wg0"]:
+                return showconf
+            return ""
+
+        with patch("automtu.wg._run", side_effect=fake_run):
+            eps = wg.wg_peer_endpoints("wg0")
+
+        self.assertEqual(eps, ["46.4.224.77", "2a01:db8::1"])
+
+    def test_wg_is_active_uses_iface_exists_and_wg_show_rc(self) -> None:
+        with (
+            patch("automtu.wg.iface_exists", return_value=True),
+            patch("automtu.wg._rc", return_value=0),
+        ):
+            self.assertTrue(wg.wg_is_active("wg0"))
+        with patch("automtu.wg.iface_exists", return_value=False):
+            self.assertFalse(wg.wg_is_active("wg0"))
+
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)