Use packaging.version instead of distutils

distutils was deprecated in Python 3.11 and removed in Python 3.12

Signed-off-by: Nghia Tran <tcnghia@gmail.com>

docker_squash/cli.py

@@ -90,6 +90,7 @@ def run(self):
         parser.add_argument(
             "-m",
             "--message",
+            default="",
             help="Specify a commit message (comment) for the new image.",
         )
         parser.add_argument(

docker_squash/squash.py

@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import os
-from distutils.version import StrictVersion
 
 import docker
+from packaging import version as packaging_version
 
 from docker_squash.errors import SquashError
 from docker_squash.lib import common
@@ -64,7 +64,9 @@ def run(self):
                 % self.output_path
             )
 
-        if StrictVersion(docker_version["ApiVersion"]) >= StrictVersion("1.22"):
+        if packaging_version.parse(
+            docker_version["ApiVersion"]
+        ) >= packaging_version.parse("1.22"):
             image = V2Image(
                 self.log,
                 self.docker,

requirements.txt

@@ -1 +1,2 @@
 docker
+packaging