RD (regular directory), Fancier cd

rd

#!/bin/bash

### Change current directory and cache it
# e.g.
# $ rd some/dir
# (after a while)
# $ rd # jump to some/dir
function rd {
  if [[ ! -z "$1" ]]; then
    cd "$1"
  if [[ $? -eq 0 ]]; then
    realpath "$1" > "$HOME/.rd_save"
  fi
  else
    if [[ ! -f "$HOME/.rd_save" ]]; then
      cd "$HOME"
    else
      read -r RD_LAST_DIR < "$HOME/.rd_save"
      cd "$RD_LAST_DIR"
    fi
  fi
}

export -f rd

# in .bashrc, add the following line
# source PATH/TO/THIS/FILE