| """A single place for constructing and exposing the main parser |
| """ |
| |
| import os |
| import sys |
| from typing import List, Tuple |
| |
| from pip._internal.cli import cmdoptions |
| from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter |
| from pip._internal.commands import commands_dict, get_similar_commands |
| from pip._internal.exceptions import CommandError |
| from pip._internal.utils.misc import get_pip_version, get_prog |
| |
| __all__ = ["create_main_parser", "parse_command"] |
| |
| |
| def create_main_parser() -> ConfigOptionParser: |
| """Creates and returns the main parser for pip's CLI""" |
| |
| parser = ConfigOptionParser( |
| usage="\n%prog <command> [options]", |
| add_help_option=False, |
| formatter=UpdatingDefaultsHelpFormatter(), |
| name="global", |
| prog=get_prog(), |
| ) |
| parser.disable_interspersed_args() |
| |
| parser.version = get_pip_version() |
| |
| # add the general options |
| gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser) |
| parser.add_option_group(gen_opts) |
| |
| # so the help formatter knows |
| parser.main = True # type: ignore |
| |
| # create command listing for description |
| description = [""] + [ |
| f"{name:27} {command_info.summary}" |
| for name, command_info in commands_dict.items() |
| ] |
| parser.description = "\n".join(description) |
| |
| return parser |
| |
| |
| def parse_command(args: List[str]) -> Tuple[str, List[str]]: |
| 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 = [f'unknown command "{cmd_name}"'] |
| if guess: |
| msg.append(f'maybe you meant "{guess}"') |
| |
| raise CommandError(" - ".join(msg)) |
| |
| # all the args without the subcommand |
| cmd_args = args[:] |
| cmd_args.remove(cmd_name) |
| |
| return cmd_name, cmd_args |