moved to https://github.com/rcmdnk/sd_cl

sd_cl.sh

# Directory store file
export LASTDIRFILE=$HOME/.lastDir
# Number of store directories
export NLASTDIR=20

function sd { # Save dir {{{
  # Set values
  local ldf=${LASTDIRFILE:-$HOME/.lastDir}
  local nld="${NLASTDIR:-20}"

  # Get last directories
  touch $ldf
  local dirs=()
  while read d;do
    dirs=("${dirs[@]}" "$d")
  done < $ldf
  local ld=${dirs[0]}

  # Push current directory
  local curdir=`pwd -P`
  if [ "$ld" != "$curdir" ];then
    dirs=("$curdir" "${dirs[@]}")
  fi

  # Store directories
  local i=0
  rm -f $ldf
  while [ $i -lt ${#dirs[@]} ] && [ $i -lt $NLASTDIR ];do
    echo "${dirs[$i]}" >> $ldf
    i=$((i+1))
  done
} # }}}

function cl { # Change directory to the Last directory {{{
  local HELP="
  Usage: cl [-lch] [-n <number> ]
  If there are no arguments, you will move to the last saved dirctory by sd command

  Arguments:
     -l              Show saved directories
     -c              Show saved directories and choose a directory
     -n              Move to <number>-th last directory
     -h              Print this HELP and exit
"

  # Set values
  local ldf=${LASTDIRFILE:-$HOME/.lastDir}

  # Initialize variables
  local nth=0
  local list=0
  local choice=0

  # OPTIND must be reset in function
  local optind_tmp=$OPTIND
  OPTIND=1

  # Get option
  while getopts cln:h OPT;do
    case $OPT in
      "c" ) choice=1 ;;
      "l" ) list=1 ;;
      "n" ) nth="$OPTARG" ;;
      "h" ) echo "$HELP" 1>&2;OPTIND=$optind_tmp;return ;;
      * ) echo "$HELP" 1>&2;OPTIND=$optind_tmp;return ;;
    esac
  done
  shift $(($OPTIND - 1))
  OPTIND=$optind_tmp

  # Get last directories
  touch $ldf
  local dirs=()
  while read d;do
    dirs=("${dirs[@]}" "$d")
  done < $ldf
  local ld=${dirs[0]}

  # List up and choose directory
  if [ $choice -eq  1 ] || [ $list -eq 1 ];then
    # List up stored directories
    local listnum=${#dirs[@]}
    local i=$((listnum-1))
    while [ $i -ge 0 ];do
      printf "%4d %s %4d\n" $i "${dirs[$i]}" $i
      i=$((i-1))
    done

    # Choose from STDIN
    if [ $choice -eq 1 ];then
      echo -n "choose directory number: "
      read nth
    fi
  fi

  # Change directory
  if [ $list != 1 ];then
    cd "${dirs[$nth]}"
  fi
} # }}}