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#!/usr/bin/env python
# coding=utf-8
"""
A sample application for tagging categories on commands.
It also demonstrates the effects of decorator order when it comes to argparse errors occurring.
"""
import functools
import cmd2
from cmd2 import (
COMMAND_NAME,
)
def my_decorator(f):
@functools.wraps(f)
def wrapper(*args, **kwds):
print('Calling decorated function')
return f(*args, **kwds)
return wrapper
class HelpCategories(cmd2.Cmd):
""" Example cmd2 application. """
START_TIMES = ['now', 'later', 'sometime', 'whenever']
# Command categories
CMD_CAT_CONNECTING = 'Connecting'
CMD_CAT_APP_MGMT = 'Application Management'
CMD_CAT_SERVER_INFO = 'Server Information'
def __init__(self):
# Set use_ipython to True to enable the "ipy" command which embeds and interactive IPython shell
super().__init__(use_ipython=False)
def do_connect(self, _):
"""Connect command"""
self.poutput('Connect')
# Tag the above command functions under the category Connecting
cmd2.categorize(do_connect, CMD_CAT_CONNECTING)
@cmd2.with_category(CMD_CAT_CONNECTING)
def do_which(self, _):
"""Which command"""
self.poutput('Which')
def do_list(self, _):
"""List command"""
self.poutput('List')
def do_deploy(self, _):
"""Deploy command"""
self.poutput('Deploy')
start_parser = cmd2.DEFAULT_ARGUMENT_PARSER(description='Start', epilog='my_decorator runs even with argparse errors')
start_parser.add_argument('when', choices=START_TIMES, help='Specify when to start')
@my_decorator
@cmd2.with_argparser(start_parser)
def do_start(self, _):
"""Start command"""
self.poutput('Start')
def do_sessions(self, _):
"""Sessions command"""
self.poutput('Sessions')
def do_redeploy(self, _):
"""Redeploy command"""
self.poutput('Redeploy')
restart_parser = cmd2.DEFAULT_ARGUMENT_PARSER(
description='Restart', epilog='my_decorator does not run when argparse errors'
)
restart_parser.add_argument('when', choices=START_TIMES, help='Specify when to restart')
@cmd2.with_argparser(restart_parser)
@cmd2.with_category(CMD_CAT_APP_MGMT)
@my_decorator
def do_restart(self, _):
"""Restart command"""
self.poutput('Restart')
def do_expire(self, _):
"""Expire command"""
self.poutput('Expire')
def do_undeploy(self, _):
"""Undeploy command"""
self.poutput('Undeploy')
def do_stop(self, _):
"""Stop command"""
self.poutput('Stop')
def do_findleakers(self, _):
"""Find Leakers command"""
self.poutput('Find Leakers')
# Tag the above command functions under the category Application Management
cmd2.categorize(
(do_list, do_deploy, do_start, do_sessions, do_redeploy, do_expire, do_undeploy, do_stop, do_findleakers),
CMD_CAT_APP_MGMT,
)
def do_resources(self, _):
"""Resources command"""
self.poutput('Resources')
def do_status(self, _):
"""Status command"""
self.poutput('Status')
def do_serverinfo(self, _):
"""Server Info command"""
self.poutput('Server Info')
def do_thread_dump(self, _):
"""Thread Dump command"""
self.poutput('Thread Dump')
def do_sslconnectorciphers(self, _):
"""
SSL Connector Ciphers command is an example of a command that contains
multiple lines of help information for the user. Each line of help in a
contiguous set of lines will be printed and aligned in the verbose output
provided with 'help --verbose'
This is after a blank line and won't de displayed in the verbose help
"""
self.poutput('SSL Connector Ciphers')
def do_vminfo(self, _):
"""VM Info command"""
self.poutput('VM Info')
# Tag the above command functions under the category Server Information
cmd2.categorize(do_resources, CMD_CAT_SERVER_INFO)
cmd2.categorize(do_status, CMD_CAT_SERVER_INFO)
cmd2.categorize(do_serverinfo, CMD_CAT_SERVER_INFO)
cmd2.categorize(do_thread_dump, CMD_CAT_SERVER_INFO)
cmd2.categorize(do_sslconnectorciphers, CMD_CAT_SERVER_INFO)
cmd2.categorize(do_vminfo, CMD_CAT_SERVER_INFO)
# The following command functions don't have the HELP_CATEGORY attribute set
# and show up in the 'Other' group
def do_config(self, _):
"""Config command"""
self.poutput('Config')
def do_version(self, _):
"""Version command"""
self.poutput(cmd2.__version__)
@cmd2.with_category("Command Management")
def do_disable_commands(self, _):
"""Disable the Application Management commands"""
message_to_print = "{} is not available while {} commands are disabled".format(COMMAND_NAME, self.CMD_CAT_APP_MGMT)
self.disable_category(self.CMD_CAT_APP_MGMT, message_to_print)
self.poutput("The Application Management commands have been disabled")
@cmd2.with_category("Command Management")
def do_enable_commands(self, _):
"""Enable the Application Management commands"""
self.enable_category(self.CMD_CAT_APP_MGMT)
self.poutput("The Application Management commands have been enabled")
if __name__ == '__main__':
import sys
c = HelpCategories()
sys.exit(c.cmdloop())
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