jenkins_plugin: fix sanity checks (#5565)

* jenkins_plugin: fix sanity checks

* update BOTMETA

* add changelog fragment

* fix copyright

* Update plugins/module_utils/jenkins.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/module_utils/jenkins.py

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/module_utils/jenkins.py

@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2022, Alexei Znamensky <russoz@gmail.com>
+#
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+import os
+import time
+
+
+def download_updates_file(updates_expiration):
+    updates_filename = 'jenkins-plugin-cache.json'
+    updates_dir = os.path.expanduser('~/.ansible/tmp')
+    updates_file = os.path.join(updates_dir, updates_filename)
+    download_updates = True
+
+    # Make sure the destination directory exists
+    if not os.path.isdir(updates_dir):
+        os.makedirs(updates_dir, 0o700)
+
+    # Check if we need to download new updates file
+    if os.path.isfile(updates_file):
+        # Get timestamp when the file was changed last time
+        ts_file = os.stat(updates_file).st_mtime
+        ts_now = time.time()
+
+        if ts_now - ts_file < updates_expiration:
+            download_updates = False
+
+    return updates_file, download_updates