fix gpg key fixture on macOS

macOS has length limitations for unix sockets, which are violated by the
default length of temporary directories.

pkgs/clan-cli/tests/gpg_keys.py

@@ -0,0 +1,25 @@
+import shutil
+from dataclasses import dataclass
+from pathlib import Path
+
+import pytest
+
+
+@dataclass
+class GpgKey:
+    fingerprint: str
+    gpg_home: Path
+
+
+@pytest.fixture
+def gpg_key(
+    temp_dir: Path,
+    monkeypatch: pytest.MonkeyPatch,
+    test_root: Path,
+) -> GpgKey:
+    gpg_home = temp_dir / "gnupghome"
+
+    shutil.copytree(test_root / "data" / "gnupg-home", gpg_home)
+    monkeypatch.setenv("GNUPGHOME", str(gpg_home))
+
+    return GpgKey("9A9B2741C8062D3D3DF1302D8B049E262A5CA255", gpg_home)