Merge pull request #985 from robertbaldyga/min-python-version-check

Better minimum python version check

utils/casctl

@@ -1,18 +1,26 @@
 #!/usr/bin/env python3
 #
 # Copyright(c) 2012-2021 Intel Corporation
-# SPDX-License-Identifier: BSD-3-Clause-Clear
+# SPDX-License-Identifier: BSD-3-Clause
 #
 
+from packaging import version
+import platform
+import sys
+
+min_ver = version.parse("3.6")
+ver = version.parse(platform.python_version())
+if ver < min_ver:
+    print((f"Minimum required python version is {min_ver}\n"
+            f"Detected python version is {ver}"),
+            file = sys.stderr)
+    exit(1)
+
 import argparse
 import re
-import sys
 
 import opencas
 
-if sys.version_info < (3, 6):
-    raise RuntimeError('At least Python 3.6 is required')
-
 def eprint(*args, **kwargs):
     print(*args, file=sys.stderr, **kwargs)