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- """A single place for constructing and exposing the main parser
- """
-
- import os
- import sys
-
- from pip import __version__
- from pip._internal.cli import cmdoptions
- from pip._internal.cli.parser import (
- ConfigOptionParser, UpdatingDefaultsHelpFormatter,
- )
- from pip._internal.commands import (
- commands_dict, get_similar_commands, get_summaries,
- )
- from pip._internal.exceptions import CommandError
- from pip._internal.utils.misc import get_prog
-
- __all__ = ["create_main_parser", "parse_command"]
-
-
- def create_main_parser():
- """Creates and returns the main parser for pip's CLI
- """
-
- parser_kw = {
- 'usage': '\n%prog <command> [options]',
- 'add_help_option': False,
- 'formatter': UpdatingDefaultsHelpFormatter(),
- 'name': 'global',
- 'prog': get_prog(),
- }
-
- parser = ConfigOptionParser(**parser_kw)
- parser.disable_interspersed_args()
-
- pip_pkg_dir = os.path.abspath(os.path.join(
- os.path.dirname(__file__), "..", "..",
- ))
- parser.version = 'pip %s from %s (python %s)' % (
- __version__, pip_pkg_dir, sys.version[:3],
- )
-
- # add the general options
- gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser)
- parser.add_option_group(gen_opts)
-
- parser.main = True # so the help formatter knows
-
- # create command listing for description
- command_summaries = get_summaries()
- description = [''] + ['%-27s %s' % (i, j) for i, j in command_summaries]
- parser.description = '\n'.join(description)
-
- return parser
-
-
- def parse_command(args):
- parser = create_main_parser()
-
- # Note: parser calls disable_interspersed_args(), so the result of this
- # call is to split the initial args into the general options before the
- # subcommand and everything else.
- # For example:
- # args: ['--timeout=5', 'install', '--user', 'INITools']
- # general_options: ['--timeout==5']
- # args_else: ['install', '--user', 'INITools']
- general_options, args_else = parser.parse_args(args)
-
- # --version
- if general_options.version:
- sys.stdout.write(parser.version)
- sys.stdout.write(os.linesep)
- sys.exit()
-
- # pip || pip help -> print_help()
- if not args_else or (args_else[0] == 'help' and len(args_else) == 1):
- parser.print_help()
- sys.exit()
-
- # the subcommand name
- cmd_name = args_else[0]
-
- 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))
-
- # all the args without the subcommand
- cmd_args = args[:]
- cmd_args.remove(cmd_name)
-
- return cmd_name, cmd_args
|
