From aa2323fb6b1c75563b9a5b40d0786b0c67b3c47a Mon Sep 17 00:00:00 2001
From: neingeist <neingeist@bl0rg.net>
Date: Sat, 31 Dec 2016 12:09:18 +0100
Subject: [PATCH] check-java-versions: Check Java versions against the newest
 one installed

---
 check-java-versions | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 check-java-versions

diff --git a/check-java-versions b/check-java-versions
new file mode 100755
index 0000000..4845bba
--- /dev/null
+++ b/check-java-versions
@@ -0,0 +1,40 @@
+#!/usr/bin/python2
+# Check Java versions against the newest one installed
+#
+# This assumes that there's OpenJDK installed and kept up to date.
+
+from __future__ import division, print_function
+from distutils.version import LooseVersion
+from subprocess import check_output
+import re
+
+
+def is_java(package):
+    filelist = check_output(['rpm', '-ql', package])
+    return re.search(r'bin/java$', filelist, re.MULTILINE)
+
+
+def package_version(package):
+    version_query = ['rpm', '--queryformat', '%{VERSION}', '-q']
+    version_query.append(package)
+
+    version = check_output(version_query)
+
+    version = re.sub('_', '.', version)
+    return version
+
+
+def java_packages():
+    all_packages = check_output(['rpm', '-qa']).split('\n')
+    packages = [package
+                for package in all_packages
+                if re.search(r'jdk|jre', package)]
+    return [package for package in packages if is_java(package)]
+
+
+versions = [LooseVersion(package_version(package))
+            for package in java_packages()]
+wanted_version = max(versions)
+old_versions = [version for version in versions if version < wanted_version]
+
+print('Too old:', old_versions)