enable -h | --help after command to show the command usage.

Bug #1023260

we caculate the position of -h|--help and command, if -h|--help
is after command, we replace the command with 'help' command.
Change-Id: Ieb5fc9d37daafd704edb71e35b74dbf83cb69a4c

1 files changed, 13 insertions, 0 deletions

diff --git a/quantumclient/shell.py b/quantumclient/shell.py
index a409758..b751545 100644
--- a/quantumclient/shell.py
+++ b/quantumclient/shell.py
@@ -219,6 +219,19 @@ class QuantumShell(App):
         :paramtype argv: list of str
         """
         try:
+            index = 0
+            command_pos = -1
+            help_pos = -1
+            for arg in argv:
+                if arg in COMMANDS[self.api_version]:
+                    if command_pos == -1:
+                        command_pos = index
+                elif arg in ('-h', '--help'):
+                    if help_pos == -1:
+                        help_pos = index
+                index = index + 1
+            if command_pos > -1 and help_pos > command_pos:
+                argv = ['help', argv[command_pos]]
             self.options, remainder = self.parser.parse_known_args(argv)
             self.configure_logging()
             self.interactive_mode = not remainder