bash menu

menu.sh

#!/bin/sh

# Author: Rob Griffiths
# Based on work from http://www.unix.com/shell-programming-scripting/27099-drop-down-menu-bash-timezone-select.html
# Licence: MIT
# Copyright (c) 2012 Rob Griffiths

# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:

# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


items=(one two three four five)

local i=0
local count=${#items[*]}
let count=count-1

echo "Please select from below using the arrow keys"
tput sc

while [ 0 ]; do
  tput rc

  if [ $i -lt 0 ]; then i=0; fi
  if [ $i -eq ${#items[*]} ]; then let i=i-1; fi

  for ((a=0; a<=$count; a++)); do

    if [ $a -eq $i ]; then
      tput rev
    else
      tput dim
    fi

    echo -en "\r                                "
    echo -en "\r"

    if [ $a -eq $i ]; then
      echo -en " > "
    else
      echo -en "   "
    fi
    
    echo -e "${items[a]}${RESET}"
  done;

  read -sn 1 twiddle
  case "$twiddle" in
    "B")
      let i=i+1
      ;;
    "A")
      let i=i-1
      ;;
    "")
      echo
      echo "OK to select ${items[$i]} (y/N)?"
      read -sn 1 confirm
      if [ "$confirm" == "y" -o "$confirm" == "Y" ]; then
        break
      else
        tput cuu1
        tput el
        tput rc
      fi
      ;;
   esac
done