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- from pip.basecommand import Command, SUCCESS
- from pip.exceptions import CommandError
- class HelpCommand(Command):
- """Show help for commands"""
- name = 'help'
- usage = """
- %prog <command>"""
- summary = 'Show help for commands.'
- def run(self, options, args):
- from pip.commands import commands, 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:
- 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[cmd_name]()
- command.parser.print_help()
- return SUCCESS
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