Add version command to pypodman

pypodman does not currently support the version command.  We want to
have as close to the same functionality between podman and pypodman,
so adding this command.

Also had to fix some validate errors.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

contrib/python/pypodman/pypodman/lib/actions/__init__.py

@@ -22,6 +22,7 @@ from pypodman.lib.actions.rm_action import Rm
 from pypodman.lib.actions.rmi_action import Rmi
 from pypodman.lib.actions.run_action import Run
 from pypodman.lib.actions.search_action import Search
+from pypodman.lib.actions.version_action import Version
 
 __all__ = [
     'Attach',
@@ -47,4 +48,5 @@ __all__ = [
     'Rmi',
     'Run',
     'Search',
+    'Version',
 ]

contrib/python/pypodman/pypodman/lib/actions/version_action.py

@@ -0,0 +1,41 @@
+"""Remote client command for reporting on Podman service."""
+import json
+import sys
+
+import podman
+import yaml
+from pypodman.lib import AbstractActionBase
+
+
+class Version(AbstractActionBase):
+    """Class for reporting on Podman Service."""
+
+    @classmethod
+    def subparser(cls, parent):
+        """Add Version command to parent parser."""
+        parser = parent.add_parser(
+            'version', help='report version on podman service')
+        parser.set_defaults(class_=cls, method='version')
+
+    def __init__(self, args):
+        """Construct Version class."""
+        super().__init__(args)
+
+    def version(self):
+        """Report on Podman Service."""
+        try:
+            info = self.client.system.info()
+        except podman.ErrorOccurred as e:
+            sys.stdout.flush()
+            print(
+                '{}'.format(e.reason).capitalize(),
+                file=sys.stderr,
+                flush=True)
+            return 1
+        else:
+            version = info._asdict()['podman']
+            host = info._asdict()['host']
+            print("Version        {}".format(version['podman_version']))
+            print("Go Version     {}".format(version['go_version']))
+            print("Git Commit     {}".format(version['git_commit']))
+            print("OS/Arch        {}/{}".format(host["os"], host["arch"]))