.bash_ps1

#!/bin/bash

if [[ $# = 0 ]]; then
  ########## WHEN SOURCED ##########
  self="${BASH_SOURCE[0]}"

  # reset style
  PS1='\[$(style reset)\]'
  
  # title
  PS1=$PS1'\[\e]0;${debian_chroot:+($debian_chroot)}\u: $(realpath "$PWD")$('$self' git_title)\a\]'
  
  # prompt
  PS1=$PS1'${debian_chroot:+($debian_chroot)}'
  if [ "$color_prompt" = yes ]; then
    PS1=$PS1'\[$(style green)\]'
    PS1=$PS1'\u'
    PS1=$PS1'\[$(style bold white)\]'
    PS1=$PS1':'
    PS1=$PS1'\[$(style reset blue)\]'
    PS1=$PS1'$(realpath "$PWD")'
    PS1=$PS1'\[$('$self' git_color)\]'
    PS1=$PS1'$('$self' git_branch)'
    PS1=$PS1'\[$(style)\]'
    PS1=$PS1' [$HISTCMD]'
    PS1=$PS1'\[$(style bold)\]\$ '
    
    # reset style after cmd
    trap "tput sgr0" DEBUG
  else
    PS1=$PS1'\u@\h:\w$('$self' git_branch)\$ '
  fi
  unset self
  
else
  ########## SELF CALLS ##########
  git_branch(){
    if ! [ $(is-git) ]; then
        return
    fi
    branch=$(git current-branch)
    if [ "$(git stash list)" ]; then
      branch="!$branch"
    fi
    echo " ($branch)"
  }

  git_color(){
    if ! [ $(is-git) ]; then
        return
    fi
    state=$(git state)
    case $(git state) in
      "up-to-date") style bold green;;
      "changed") style bold red;;
      "no-upstream") style bold black;;
      "diverged") echo -e '\033[01;35m';;
      "behind") style bold yellow;;
      "ahead") style bold blue;;
    esac
  }
  
  git_title(){
    if ! [ $(is-git) ]; then
        return
    fi
    branch=$(git current-branch)
    state=$(git state)
    echo " ($branch, $state)"
  }
  
  $*
fi