import sys import textwrap from optparse import Values from typing import List from pip._internal.cli.base_command import Command from pip._internal.cli.status_codes import SUCCESS from pip._internal.utils.misc import get_prog BASE_COMPLETION = """ # pip {shell} completion start{script}# pip {shell} completion end """ COMPLETION_SCRIPTS = { "bash": """ _pip_completion() {{ COMPREPLY=( $( COMP_WORDS="${{COMP_WORDS[*]}}" \\ COMP_CWORD=$COMP_CWORD \\ PIP_AUTO_COMPLETE=1 $1 2>/dev/null ) ) }} complete -o default -F _pip_completion {prog} """, "zsh": """ function _pip_completion {{ local words cword read -Ac words read -cn cword reply=( $( COMP_WORDS="$words[*]" \\ COMP_CWORD=$(( cword-1 )) \\ PIP_AUTO_COMPLETE=1 $words[1] 2>/dev/null )) }} compctl -K _pip_completion {prog} """, "fish": """ function __fish_complete_pip set -lx COMP_WORDS (commandline -o) "" set -lx COMP_CWORD ( \\ math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\ ) set -lx PIP_AUTO_COMPLETE 1 string split \\ -- (eval $COMP_WORDS[1]) end complete -fa "(__fish_complete_pip)" -c {prog} """, } class CompletionCommand(Command): """A helper command to be used for command completion.""" ignore_require_venv = True def add_options(self) -> None: self.cmd_opts.add_option( "--bash", "-b", action="store_const", const="bash", dest="shell", help="Emit completion code for bash", ) self.cmd_opts.add_option( "--zsh", "-z", action="store_const", const="zsh", dest="shell", help="Emit completion code for zsh", ) self.cmd_opts.add_option( "--fish", "-f", action="store_const", const="fish", dest="shell", help="Emit completion code for fish", ) self.parser.insert_option_group(0, self.cmd_opts) def run(self, options: Values, args: List[str]) -> int: """Prints the completion code of the given shell""" shells = COMPLETION_SCRIPTS.keys() shell_options = ["--" + shell for shell in sorted(shells)] if options.shell in shells: script = textwrap.dedent( COMPLETION_SCRIPTS.get(options.shell, "").format(prog=get_prog()) ) print(BASE_COMPLETION.format(script=script, shell=options.shell)) return SUCCESS else: sys.stderr.write( "ERROR: You must pass {}\n".format(" or ".join(shell_options)) ) return SUCCESS