Fix cleanup with multiple arguments

Also improve the printing of docker commands being run when calling
--verbose

paunch/builder/compose1.py

@@ -58,7 +58,7 @@ class ComposeV1Builder(object):
                 LOG.error("Error running %s. [%s]\n" % (cmd, returncode))
                 deploy_status_code = returncode
             else:
-                LOG.debug('Completed %s' % cmd)
+                LOG.debug('Completed $ %s' % ' '.join(cmd))
         return stdout, stderr, deploy_status_code
 
     def label_arguments(self, cmd, container):

paunch/cmd.py

@@ -83,7 +83,7 @@ class Cleanup(Command):
         parser.add_argument(
             'config_id',
             metavar='<config_id>',
-            nargs='?',
+            nargs='*',
             help=('Identifiers for the configs which still apply, all others '
                   'will be deleted.'),
         )

paunch/runner.py

@@ -29,7 +29,7 @@ class DockerRunner(object):
 
     @staticmethod
     def execute(cmd):
-        LOG.debug(' '.join(cmd))
+        LOG.debug('$ %s' % ' '.join(cmd))
         subproc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                                    stderr=subprocess.PIPE)
         cmd_stdout, cmd_stderr = subproc.communicate()
@@ -157,6 +157,9 @@ class DockerRunner(object):
         return container
 
     def delete_missing_configs(self, config_ids):
+        if not config_ids:
+            config_ids = []
+
         for conf_id in self.current_config_ids():
             if conf_id not in config_ids:
                 LOG.debug('%s no longer exists, deleting containers' % conf_id)