Migrate from appdirs to platformdirs

Closes pylint-dev#4886

ChangeLog

@@ -18,6 +18,9 @@ Release date: TBA
 ..
   Put bug fixes that should not wait for a new minor version here
 
+* We now use platformdirs instead of appdirs since the latter is not maintained.
+
+  Closes #4886
 
 
 What's New in Pylint 2.10.1?

pylint/config/__init__.py

@@ -40,7 +40,7 @@
 import sys
 from datetime import datetime
 
-import appdirs
+import platformdirs
 
 from pylint.config.configuration_mixin import ConfigurationMixIn
 from pylint.config.find_default_config_files import find_default_config_files
@@ -69,7 +69,7 @@
 elif USER_HOME == "~":
     PYLINT_HOME = ".pylint.d"
 else:
-    PYLINT_HOME = appdirs.user_cache_dir("pylint")
+    PYLINT_HOME = platformdirs.user_cache_dir("pylint")
     # The spam prevention is due to pylint being used in parallel by
     # pre-commit, and the message being spammy in this context
     # Also if you work with old version of pylint that recreate the

setup.cfg

@@ -42,7 +42,7 @@ project_urls =
 [options]
 packages = find:
 install_requires =
-    appdirs>=1.4.0
+    platformdirs>=2.0.0
     astroid>=2.7.2,<2.8 # (You should also upgrade requirements_test_min.txt)
     isort>=4.2.5,<6
     mccabe>=0.6,<0.7
@@ -75,15 +75,15 @@ markers =
 [isort]
 multi_line_output = 3
 line_length = 88
-known_third_party = appdirs, astroid, sphinx, isort, pytest, mccabe, six, toml
+known_third_party = platformdirs, astroid, sphinx, isort, pytest, mccabe, six, toml
 include_trailing_comma = True
 skip_glob = tests/functional/**,tests/input/**,tests/extensions/data/**,tests/regrtest_data/**,tests/data/**,astroid/**,venv/**
 src_paths = pylint
 
 [mypy]
 scripts_are_modules = True
 
-[mypy-appdirs]
+[mypy-platformdirs]
 ignore_missing_imports = True
 
 [mypy-astroid.*]

tests/lint/unittest_lint.py

@@ -49,7 +49,7 @@
 from os.path import abspath, basename, dirname, isdir, join, sep
 from shutil import rmtree
 
-import appdirs
+import platformdirs
 import pytest
 
 from pylint import checkers, config, exceptions, interfaces, lint, testutils
@@ -635,7 +635,7 @@ def test_pylint_home():
     if uhome == "~":
         expected = ".pylint.d"
     else:
-        expected = appdirs.user_cache_dir("pylint")
+        expected = platformdirs.user_cache_dir("pylint")
     assert config.PYLINT_HOME == expected
 
     try: