bashrc script to add newlines before and after each prompt, for easier reading

.bashrc

#---------------------------------------------
# Newlines before and after each prompt line
#---------------------------------------------
function pre_command() {
    printf "\n"
}

function post_command() {
    printf "\n"
}

function pre_command_hook() {
    if [ -z "$AT_PROMPT" ]; then
      return
    fi
    unset AT_PROMPT
    pre_command
}

function post_command_hook() {
    AT_PROMPT=1
    if [ -n "$FIRST_PROMPT" ]; then
      unset FIRST_PROMPT
      return
    fi
    post_command
}

FIRST_PROMPT=1

trap "pre_command_hook" DEBUG
PROMPT_COMMAND="post_command_hook"