Fix multi-path returned from _path methods on MacOS

Fix `site_{data,cache}_path` returning `pathlib.Path` based on the
entire `:` separated multipath under Homebrew with `multipath` enabled.
Instead, follow the approach used by `Unix` and only return the first
element if we're `multipath`

These were the only two attributes that changed when under `homebrew`

Issue: 292

src/platformdirs/api.py

@@ -91,6 +91,12 @@ def _optionally_create_directory(self, path: str) -> None:
         if self.ensure_exists:
             Path(path).mkdir(parents=True, exist_ok=True)
 
+    def _first_item_as_path_if_multipath(self, directory: str) -> Path:
+        if self.multipath:
+            # If multipath is True, the first path is returned.
+            directory = directory.split(os.pathsep)[0]
+        return Path(directory)
+
     @property
     @abstractmethod
     def user_data_dir(self) -> str:

src/platformdirs/macos.py

@@ -4,9 +4,13 @@
 
 import os.path
 import sys
+from typing import TYPE_CHECKING
 
 from .api import PlatformDirsABC
 
+if TYPE_CHECKING:
+    from pathlib import Path
+
 
 class MacOS(PlatformDirsABC):
     """
@@ -42,6 +46,11 @@ def site_data_dir(self) -> str:
             return os.pathsep.join(path_list)
         return path_list[0]
 
+    @property
+    def site_data_path(self) -> Path:
+        """:return: data path shared by users. Only return the first item, even if ``multipath`` is set to ``True``"""
+        return self._first_item_as_path_if_multipath(self.site_data_dir)
+
     @property
     def user_config_dir(self) -> str:
         """:return: config directory tied to the user, same as `user_data_dir`"""
@@ -74,6 +83,11 @@ def site_cache_dir(self) -> str:
             return os.pathsep.join(path_list)
         return path_list[0]
 
+    @property
+    def site_cache_path(self) -> Path:
+        """:return: cache path shared by users. Only return the first item, even if ``multipath`` is set to ``True``"""
+        return self._first_item_as_path_if_multipath(self.site_cache_dir)
+
     @property
     def user_state_dir(self) -> str:
         """:return: state directory tied to the user, same as `user_data_dir`"""

src/platformdirs/unix.py

@@ -218,12 +218,6 @@ def site_cache_path(self) -> Path:
         """:return: cache path shared by users. Only return the first item, even if ``multipath`` is set to ``True``"""
         return self._first_item_as_path_if_multipath(self.site_cache_dir)
 
-    def _first_item_as_path_if_multipath(self, directory: str) -> Path:
-        if self.multipath:
-            # If multipath is True, the first path is returned.
-            directory = directory.split(os.pathsep)[0]
-        return Path(directory)
-
     def iter_config_dirs(self) -> Iterator[str]:
         """:yield: all user and site configuration directories."""
         yield self.user_config_dir

tests/test_macos.py

@@ -82,6 +82,8 @@ def test_macos(mocker: MockerFixture, params: dict[str, Any], func: str) -> None
         "site_config_dir",
         "site_cache_dir",
         "site_runtime_dir",
+        "site_cache_path",
+        "site_data_path",
     ],
 )
 @pytest.mark.parametrize("multipath", [pytest.param(True, id="multipath"), pytest.param(False, id="singlepath")])
@@ -99,6 +101,8 @@ def test_macos_homebrew(mocker: MockerFixture, params: dict[str, Any], multipath
         "site_config_dir": f"/opt/homebrew/share{suffix}",
         "site_cache_dir": f"/opt/homebrew/var/cache{suffix}",
         "site_runtime_dir": f"{home}/Library/Caches/TemporaryItems{suffix}",
+        "site_cache_path": Path(f"/opt/homebrew/var/cache{suffix}"),
+        "site_data_path": Path(f"/opt/homebrew/share{suffix}"),
     }
     if multipath:
         expected_map["site_data_dir"] += f":/Library/Application Support{suffix}"