zsh - first tab completion with autocd

问题

I am currently switching from csh to zsh I am writing a .zshrc trying to get all the options I am used to in this new shell.

I use autocd (to go into a directory just typing its name (without the cd command), and I wonder if it is possible that my first propose all the files existing in the current directory (like it's working in csh).

I am quite used to this way of having an overview of the files I can open or directory I can "autocd" into, before typing my command just pressing without anything written in my commandline yet.

Right now when I first press it does not trigger any completion mechanism but it just write an actual tabulation.

I did not find any solution yet, and if anyone has any magic options to get this results, feel free to enlighten me!

Thanks

回答1:

I found a way!
No need for autocd, though this option exists in zsh
To put in your ~/.zshrc:

first-tab() {
    if [[ $#BUFFER == 0 ]]; then
        BUFFER="cd "
        CURSOR=3
        zle list-choices
    else
        zle expand-or-complete
    fi
}
zle -N first-tab
bindkey '^I' first-tab

Thanks to this question: zsh tab completion on empty line

So press tab once and you will get "cd " and the existing directories.

Checkout man zshoptions for other existing options which could be useful
(setopt menucomplete could be useful to save a tab, but change behaviour for other completion as well.)

回答2:

Here is another more complex variation.

It will list files on on an empty command line, and in the middle of any command.
It will list directories on on an empty command line.
It will list executables on on an empty command line.

It can be configured to prepend "cd " or "./" in those cases with a global variable.

export TAB_LIST_FILES_PREFIX

# List files in zsh with <TAB>
#
# Copyleft 2017 by Ignacio Nunez Hernanz <nacho _a_t_ ownyourbits _d_o_t_ com>
# GPL licensed (see end of file) * Use at your own risk!
#
# Usage:
#   In the middle of the command line:
#     (command being typed)<TAB>(resume typing)
#
#   At the beginning of the command line:
#     <SPACE><TAB>
#     <SPACE><SPACE><TAB>
#
# Notes:
#   This does not affect other completions
#   If you want 'cd ' or './' to be prepended, write in your .zshrc 'export TAB_LIST_FILES_PREFIX'
#   I recommend to complement this with push-line-or edit (bindkey '^q' push-line-or-edit)
function tab_list_files
{
  if [[ $#BUFFER == 0 ]]; then
    BUFFER="ls "
    CURSOR=3
    zle list-choices
    zle backward-kill-word
  elif [[ $BUFFER =~ ^[[:space:]][[:space:]].*$ ]]; then
    BUFFER="./"
    CURSOR=2
    zle list-choices
    [ -z ${TAB_LIST_FILES_PREFIX+x} ] && BUFFER="  " CURSOR=2
  elif [[ $BUFFER =~ ^[[:space:]]*$ ]]; then
    BUFFER="cd "
    CURSOR=3
    zle list-choices
    [ -z ${TAB_LIST_FILES_PREFIX+x} ] && BUFFER=" " CURSOR=1
  else
    BUFFER_=$BUFFER
    CURSOR_=$CURSOR
    zle expand-or-complete || zle expand-or-complete || {
      BUFFER="ls "
      CURSOR=3
      zle list-choices
      BUFFER=$BUFFER_
      CURSOR=$CURSOR_
    }
  fi
}
zle -N tab_list_files
bindkey '^I' tab_list_files

# uncomment the following line to prefix 'cd ' and './' 
# when listing dirs and executables respectively
#export TAB_LIST_FILES_PREFIX

# these two lines are usually included by oh-my-zsh, but just in case
autoload -Uz compinit
compinit

# uncomment the following line to complement tab_list_files with ^q
#bindkey '^q' push-line-or-edit

# License
#
# This script is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This script is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this script; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place, Suite 330,
# Boston, MA  02111-1307  USA