abws (A Bash With Suggestions)A shell toy (maybe not a toy, it's up to you) with suggested functionality implemented entirely in bash script.

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About

This is a script that uses a bash script to implement similar functionality to the zsh-autosuggestions plugin. To implement the suggested functionality, I implemented some of the kernel-provided line editor commands (just to provide basic functionality). Here is the implemented readline command.

Requirement

Bash version 4.4+

KayMaps

keymap shortcut	command
Ctrl-a	beginning-of-line
Ctrl-b	backward-char
Ctrl-d	delete-char
Ctrl-e	end-of-line or accept_suggestion
Ctrl-f	forward-char
Ctrl-k	kill-line-to-end
Ctrl-n	next-history
Ctrl-p	previous-history
Ctrl-u	kill-line-to-start
Ctrl-w	backward-kill-word
Ctrl-l	clear_screen
Ctrl-i or Tab	expand-or-complete
Alt+d	forward-kill-word
Alt+b	backward-word
Alt+f	forward-word
Up	lastcmd
Down	nextcmd
Right	cursor_right or accept_suggestion
Left	cursor_left
typing chars	self-insert

Note: Ctrl-c Call the trap function on_sig_int and use the exit command to exit the program.

Implemented functions

Auto Suggestions

Completion

• directory completion

  

• file completion

  

Previous Command Status Acquisition

Dynamic Prompt

Basic Unicode Support

Possible uses

1. A little reference for those who want to implement custom suggestion function.
2. This program can be used as a frontend application, for example to provide complementary functionality for mysql or redis client commands.
3. ...

Examples

As redis-cli with complementary functions

You can use the redirect feature since bash 2.04 to create tcp or udp connections.

#!/bin/bash

# A redis service has been started locally
# Create file descriptors that can be read and written
exec 3<> /dev/tcp/localhost/6379

r() {
  local response=""
  while read -rn 1 -t 0.1 input || [[ -n $input ]]
  do
    response+="$input"
  done <&3
  echo -e "$response"
}

w () {
  read -p "cmd: "
  echo "$REPLY" >&3
}

while :
do
  w
  r
done

Just a possible idea is provided here. Similar functionality can be integrated into the current program, which can provide suggested actions for the command line.

Things that come to mind that are not currently completed and may need to be completed.

• more tests
• bind command output shortcut key binding
• Multi-line input processing
• Complementary fully automatic formatting of output
• syntax highlighting
• Optimize code: Improve buffer processing rate ( deletekey function is particularly slow in current implementation )
• add reserved words to support some custom syntax
• implement more shortcut keys

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Since this script is not well tested, so if there are any bugs or ideas about the program you can submit pr or discuss them together🤗.