dot_bash_prompt

# Utilise the extended colour palette in the command-line output
if [[ $COLORTERM = gnome-* && $TERM = xterm ]] && infocmp gnome-256color > /dev/null 2>&1; then
  export TERM="gnome-256color"
elif infocmp xterm-256color > /dev/null 2>&1; then
  export TERM="xterm-256color"
fi
if tput setaf 1 > /dev/null 2>&1; then
  tput sgr0
  export bold=$(tput bold)
  export reset=$(tput sgr0)
  export black=$(tput setaf 0)
  export blue=$(tput setaf 33)
  export cyan=$(tput setaf 37)
  export green=$(tput setaf 64)
  export orange=$(tput setaf 166)
  export pink=$(tput setaf 9)
  export purple=$(tput setaf 125)
  export red=$(tput setaf 124)
  export violet=$(tput setaf 61)
  export white=$(tput setaf 15)
  export yellow=$(tput setaf 136)
else
  export bold=""
  export reset="\e[0m"
  export black="\e[1;30m"
  export blue="\e[1;34m"
  export cyan="\e[1;36m"
  export green="\e[1;32m"
  export orange="\e[1;33m"
  export pink="\e[1;31m"
  export purple="\e[1;35m"
  export red="\e[1;31m"
  export violet="\e[1;35m"
  export white="\e[1;37m"
  export yellow="\e[1;33m"
fi

# Highlight the user and host name when logged in as root
if [[ $(id -un) == "root" ]] || [[ "$USER" == "root" ]]; then
  userStyle="${pink}"
  hostStyle="${pink}"
else
  userStyle="${orange}"
  hostStyle="${yellow}"
fi

function prompt_command() {

  local exit_code=$?
  if [ $exit_code -ne 0 ]; then
    exit_code=" \[${reset}${pink}\](${exit_code})"
  else
    exit_code=""
  fi

  PS1="\[\033]0;\w\007\]"
  PS1+="\[${bold}${userStyle}\]\u "           # {user}
  PS1+="\[${reset}${white}\]at "              # at
  PS1+="\[${bold}${hostStyle}\]\h "           # {host}
  PS1+="\[${reset}${white}\]in "              # in
  PS1+="\[${bold}${green}\]\w"                # {dir}
  PS1+="${exit_code}"                              # {exit_code}
  PS1+="\[${reset}${white}\] \$ \[${reset}\]" # $
  export PS1

  PS2="\[${white}\]→ \[${reset}\]"
  export PS2
}

export PROMPT_COMMAND="prompt_command"