"""Logic that powers autocompletion installed by ``pip completion``. """ import optparse import os import sys from itertools import chain from pip._internal.cli.main_parser import create_main_parser from pip._internal.commands import commands_dict, create_command from pip._internal.utils.misc import get_installed_distributions from pip._internal.utils.typing import MYPY_CHECK_RUNNING if MYPY_CHECK_RUNNING: from typing import Any, Iterable, List, Optional def autocomplete(): # type: () -> None """Entry Point for completion of main and subcommand options. """ # Don't complete if user hasn't sourced bash_completion file. if 'PIP_AUTO_COMPLETE' not in os.environ: return cwords = os.environ['COMP_WORDS'].split()[1:] cword = int(os.environ['COMP_CWORD']) try: current = cwords[cword - 1] except IndexError: current = '' parser = create_main_parser() subcommands = list(commands_dict) options = [] # subcommand subcommand_name = None # type: Optional[str] for word in cwords: if word in subcommands: subcommand_name = word break # subcommand options if subcommand_name is not None: # special case: 'help' subcommand has no options if subcommand_name == 'help': sys.exit(1) # special case: list locally installed dists for show and uninstall should_list_installed = ( subcommand_name in ['show', 'uninstall'] and not current.startswith('-') ) if should_list_installed: installed = [] lc = current.lower() for dist in get_installed_distributions(local_only=True): if dist.key.startswith(lc) and dist.key not in cwords[1:]: installed.append(dist.key) # if there are no dists installed, fall back to option completion if installed: for dist in installed: print(dist) sys.exit(1) subcommand = create_command(subcommand_name) for opt in subcommand.parser.option_list_all: if opt.help != optparse.SUPPRESS_HELP: for opt_str in opt._long_opts + opt._short_opts: options.append((opt_str, opt.nargs)) # filter out previously specified options from available options prev_opts = [x.split('=')[0] for x in cwords[1:cword - 1]] options = [(x, v) for (x, v) in options if x not in prev_opts] # filter options by current input options = [(k, v) for k, v in options if k.startswith(current)] # get completion type given cwords and available subcommand options completion_type = get_path_completion_type( cwords, cword, subcommand.parser.option_list_all, ) # get completion files and directories if ``completion_type`` is # ````, ```` or ```` if completion_type: paths = auto_complete_paths(current, completion_type) options = [(path, 0) for path in paths] for option in options: opt_label = option[0] # append '=' to options which require args if option[1] and option[0][:2] == "--": opt_label += '=' print(opt_label) else: # show main parser options only when necessary opts = [i.option_list for i in parser.option_groups] opts.append(parser.option_list) flattened_opts = chain.from_iterable(opts) if current.startswith('-'): for opt in flattened_opts: if opt.help != optparse.SUPPRESS_HELP: subcommands += opt._long_opts + opt._short_opts else: # get completion type given cwords and all available options completion_type = get_path_completion_type(cwords, cword, flattened_opts) if completion_type: subcommands = list(auto_complete_paths(current, completion_type)) print(' '.join([x for x in subcommands if x.startswith(current)])) sys.exit(1) def get_path_completion_type(cwords, cword, opts): # type: (List[str], int, Iterable[Any]) -> Optional[str] """Get the type of path completion (``file``, ``dir``, ``path`` or None) :param cwords: same as the environmental variable ``COMP_WORDS`` :param cword: same as the environmental variable ``COMP_CWORD`` :param opts: The available options to check :return: path completion type (``file``, ``dir``, ``path`` or None) """ if cword < 2 or not cwords[cword - 2].startswith('-'): return None for opt in opts: if opt.help == optparse.SUPPRESS_HELP: continue for o in str(opt).split('/'): if cwords[cword - 2].split('=')[0] == o: if not opt.metavar or any( x in ('path', 'file', 'dir') for x in opt.metavar.split('/')): return opt.metavar return None def auto_complete_paths(current, completion_type): # type: (str, str) -> Iterable[str] """If ``completion_type`` is ``file`` or ``path``, list all regular files and directories starting with ``current``; otherwise only list directories starting with ``current``. :param current: The word to be completed :param completion_type: path completion type(`file`, `path` or `dir`)i :return: A generator of regular files and/or directories """ directory, filename = os.path.split(current) current_path = os.path.abspath(directory) # Don't complete paths if they can't be accessed if not os.access(current_path, os.R_OK): return filename = os.path.normcase(filename) # list all files that start with ``filename`` file_list = (x for x in os.listdir(current_path) if os.path.normcase(x).startswith(filename)) for f in file_list: opt = os.path.join(current_path, f) comp_file = os.path.normcase(os.path.join(directory, f)) # complete regular files when there is not ```` after option # complete directories when there is ````, ```` or # ````after option if completion_type != 'dir' and os.path.isfile(opt): yield comp_file elif os.path.isdir(opt): yield os.path.join(comp_file, '')