Added print_version

tests/test_settings.py

@@ -4,13 +4,19 @@ import paramiko
 import tornado.options as options
 
 from webssh.settings import (
-    get_host_keys_settings, get_policy_setting, base_dir
+    get_host_keys_settings, get_policy_setting, base_dir, print_version
 )
 from webssh.policy import load_host_keys
+from webssh._version import __version__
 
 
 class TestSettings(unittest.TestCase):
 
+    def test_print_version(self):
+        self.assertNotEqual(print_version(False), 2, msg=__version__)
+        with self.assertRaises(SystemExit):
+            self.assertEqual(print_version(True), 2, msg=__version__)
+
     def test_get_host_keys_settings(self):
         options.hostFile = ''
         options.sysHostFile = ''

webssh/settings.py

 import logging
 import os.path
+import sys
 import uuid
 
 from tornado.options import define
 from webssh.policy import (
     load_host_keys, get_policy_class, check_policy_setting
 )
+from webssh._version import __version__
+
+
+def print_version(flag):
+    if flag:
+        print(__version__)
+        sys.exit(0)
 
 
 define('address', default='127.0.0.1', help='listen address')
@@ -15,6 +23,8 @@ define('policy', default='warning',
        help='missing host key policy, reject|autoadd|warning')
 define('hostFile', default='', help='User defined host keys file')
 define('sysHostFile', default='', help='System wide host keys file')
+define('version', type=bool, help='show version information',
+       callback=print_version)
 
 
 base_dir = os.path.dirname(__file__)