My Bash configurations

.bashrc

alias ls='ls --color=auto'
alias ll='ls -hl --group-directories-first'

PROMPT_COMMAND=setup_prompt

setup_prompt() {
  exit_code="$?"

  PS1="[\[\e[1;34m\]\w\[\e[0m\]:\[\e[1;95m\]${exit_code}\[\e[0m\]]"

  if test "$exit_code" != "0"; then
    PS1+="\[\e[1;31m\]\$\[\e[0m\] "
  else
    PS1+="\[\e[1;32m\]\$\[\e[0m\] "
  fi
}