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- from __future__ import absolute_import
- from pip._internal.basecommand import SUCCESS, Command
- from pip._internal.exceptions import CommandError
- class HelpCommand(Command):
- """Show help for commands"""
- name = 'help'
- usage = """
- %prog <command>"""
- summary = 'Show help for commands.'
- ignore_require_venv = True
- def run(self, options, args):
- from pip._internal.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
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