Add get_location to preferences

Commit b027650 (Replace
PreferencesManager with module functions) lacked the ability to get
the current preferences file location.

Author: emilmelnikov

tests/test_utility/test_preferences.py

@@ -21,6 +21,12 @@ def test_setmany_getmany(preferences):
     assert preferences.getmany(("spam", "eggs1", None), ("ham", "eggs3", None)) == (42, "antigravity")
 
 
+def test_get_location(tmp_path, preferences):
+    path = tmp_path / "preferences2"
+    preferences.set_location(path)
+    assert preferences.get_location() == path
+
+
 def test_set_location(tmp_path, preferences):
     preferences.set("spam", "eggs", 42)
     preferences.set_location(tmp_path / "preferences2")

volumina/utility/preferences.py

@@ -70,10 +70,14 @@ def setmany(self, *args: Tuple[str, str, Any]) -> None:
                 if not isinstance(e, IOError):
                     self._path.unlink()
 
-    def set_location(self, path: pathlib.Path) -> None:
+    def get_location(self) -> pathlib.Path:
         with self._lock:
-            self._path = path
-            self._data = _load_preferences(path)
+            return self._path
+
+    def set_location(self, path: os.PathLike) -> None:
+        with self._lock:
+            self._path = pathlib.Path(path)
+            self._data = _load_preferences(self._path)
 
 
 def _load_preferences(path: pathlib.Path) -> MutableMapping[str, MutableMapping[str, Any]]:
@@ -134,10 +138,22 @@ def setmany(*args: Tuple[str, str, Any]) -> None:
     return _preferences.setmany(*args)
 
 
+def get_location() -> pathlib.Path:
+    """Return the current preferences file location.
+
+    See Also:
+          :func:`set_location`.
+    """
+    return _preferences.get_location()
+
+
 def set_location(path: os.PathLike) -> None:
     """Change the preferences file location.
 
     Discard all existing preferences and read preferences from the new
     file. This file will be used for all subsequent preferences writes.
+
+    See Also:
+          :func:`get_location`.
     """
-    _preferences.set_location(pathlib.Path(path))
+    _preferences.set_location(path)