Switch from appdirs to platformdirs

news/10202.feature.rst

@@ -0,0 +1 @@
+Replace vendored appdirs with platformdirs.

news/pkg_resources.vendor.rst

@@ -0,0 +1 @@
+Patch pkg_resources to use platformdirs rather than appdirs.

news/platformdirs.vendor.rst

@@ -0,0 +1 @@
+Patch platformdirs import its submodules from ``pip._vendor.platformdirs``.

pyproject.toml

@@ -48,7 +48,6 @@ drop = [
 
 [tool.vendoring.typing-stubs]
 six = ["six.__init__", "six.moves.__init__", "six.moves.configparser"]
-appdirs = []
 distro = []
 
 [tool.vendoring.license.directories]

src/pip/_internal/utils/appdirs.py

@@ -7,9 +7,10 @@
 """
 
 import os
+import sys
 from typing import List
 
-from pip._vendor import appdirs as _appdirs
+from pip._vendor import platformdirs as _appdirs
 
 
 def user_cache_dir(appname: str) -> str:
@@ -18,7 +19,7 @@ def user_cache_dir(appname: str) -> str:
 
 def user_config_dir(appname: str, roaming: bool = True) -> str:
     path = _appdirs.user_config_dir(appname, appauthor=False, roaming=roaming)
-    if _appdirs.system == "darwin" and not os.path.isdir(path):
+    if sys.platform == "darwin" and not os.path.isdir(path):
         path = os.path.expanduser("~/.config/")
         if appname:
             path = os.path.join(path, appname)
@@ -29,7 +30,11 @@ def user_config_dir(appname: str, roaming: bool = True) -> str:
 # see <https://github.com/pypa/pip/issues/1733>
 def site_config_dirs(appname: str) -> List[str]:
     dirval = _appdirs.site_config_dir(appname, appauthor=False, multipath=True)
-    if _appdirs.system not in ["win32", "darwin"]:
+    if sys.platform == "darwin":
+        # always look in /Library/Application Support/pip as well
+        return dirval.split(os.pathsep) + ["/Library/Application Support/pip"]
+    elif sys.platform == "win32":
+        return [dirval]
+    else:
         # always look in /etc directly as well
         return dirval.split(os.pathsep) + ["/etc"]
-    return [dirval]

src/pip/_vendor/README.rst

@@ -100,7 +100,8 @@ Modifications
 
 * ``setuptools`` is completely stripped to only keep ``pkg_resources``.
 * ``pkg_resources`` has been modified to import its dependencies from
-  ``pip._vendor``.
+  ``pip._vendor``, and to use the vendored copy of ``platformdirs``
+  rather than ``appdirs``.
 * ``packaging`` has been modified to import its dependencies from
   ``pip._vendor``.
 * ``html5lib`` has been modified to import six from ``pip._vendor``, to prefer
@@ -111,7 +112,7 @@ Modifications
 * ``requests`` has been modified to import its other dependencies from
   ``pip._vendor`` and to *not* load ``simplejson`` (all platforms) and
   ``pyopenssl`` (Windows).
-
+* ``platformdirs`` has been modified to import its submodules from ``pip._vendor.platformdirs``.
 
 Automatic Vendoring
 ===================

src/pip/_vendor/__init__.py

@@ -58,7 +58,6 @@ def vendored(modulename):
     sys.path[:] = glob.glob(os.path.join(WHEEL_DIR, "*.whl")) + sys.path
 
     # Actually alias all of our vendored dependencies.
-    vendored("appdirs")
     vendored("cachecontrol")
     vendored("certifi")
     vendored("colorama")
@@ -74,6 +73,7 @@ def vendored(modulename):
     vendored("packaging.specifiers")
     vendored("pep517")
     vendored("pkg_resources")
+    vendored("platformdirs")
     vendored("progress")
     vendored("requests")
     vendored("requests.exceptions")