from __future__ import absolute_import from pip.basecommand import Command, SUCCESS from pip.exceptions import CommandError class HelpCommand(Command): """Show help for commands""" name = 'help' usage = """ %prog """ summary = 'Show help for commands.' def run(self, options, args): from pip.commands import commands_dict, get_similar_commands try: # 'pip help' with no args is handled by pip.__init__.parseopt() cmd_name = args[0] # the command we need help for except IndexError: return SUCCESS if cmd_name not in commands_dict: guess = get_similar_commands(cmd_name) msg = ['unknown command "%s"' % cmd_name] if guess: msg.append('maybe you meant "%s"' % guess) raise CommandError(' - '.join(msg)) command = commands_dict[cmd_name]() command.parser.print_help() return SUCCESS