Fix bug with cache's parent directory not existing

By changing the function used to create the cache from ``os.mkdir`` to ``os.makedirs`` we now handle non-existing parent directories correctly. This closes pylint-dev#4900
DanielNoord · Sep 10, 2021 · 00907c8 · 00907c8
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diff --git a/ChangeLog b/ChangeLog
@@ -73,6 +73,10 @@ Release date: TBA
 
   Closes #4901
 
+* Fix a bug where pylint complained if the cache's parent directory does not exist
+
+  Closes #4900
+
 
 What's New in Pylint 2.10.3?
 ============================

diff --git a/doc/whatsnew/2.11.rst b/doc/whatsnew/2.11.rst
@@ -75,3 +75,7 @@ Other Changes
 * Setting ``min-similarity-lines`` to 0 now makes the similarty checker stop checking for duplicate code
 
   Closes #4901
+
+* Fix a bug where pylint complained if the cache's parent directory does not exist
+
+  Closes #4900
diff --git a/pylint/config/__init__.py b/pylint/config/__init__.py
@@ -125,7 +125,7 @@ def load_results(base):
 def save_results(results, base):
     if not os.path.exists(PYLINT_HOME):
         try:
-            os.mkdir(PYLINT_HOME)
+            os.makedirs(PYLINT_HOME)
         except OSError:
             print(f"Unable to create directory {PYLINT_HOME}", file=sys.stderr)
     data_file = _get_pdata_path(base, 1)