Terminal Prompt Magic

terminal.bash

function __git_branch() {
  b=$(git rev-parse --abbrev-ref HEAD 2>/dev/null)
  if [ ! -z "$b" ]; then
    echo "($b) "
  else
    echo ""
  fi
}

function __git_dirty() {
  if [ ! -z "$(git status --porcelain 2>/dev/null)" ]; then
    echo "* "
  else
    echo ""
  fi
}

function __pwd() {
  pwd_length=20
  # horizontal ellipsis
  pwd_symbol=$(echo $'\xe2\x80\xa6')
  newPWD="${PWD/#$HOME/~}"
  if [ $(echo -n $newPWD | wc -c | tr -d " ") -gt $pwd_length ]
  then
    newPWD=$(echo -n $newPWD | awk -v pwd_symbol="$pwd_symbol"  -F '/' '{print $1 "/" $2 "/" pwd_symbol "/" $(NF-1) "/" $(NF)}')
  fi
  echo $newPWD
}

# ╥☺
custom=$(echo $'\xe2\x95\xa5\xe2\x98\xba')

# colours
bg_yellow="\[\e[43m\]"
bg_light_gray="\[\e[47m\]"
fg_red="\[\e[31m\]"
fg_bold_yellow="\[\e[1;32m\]"
fg_reset="\[\e[0m\]"

export PS1="$bg_yellow$fg_red\t$fg_reset $fg_red\$(__git_branch)\$(__git_dirty) $fg_bold_yellow\$(__pwd)$fg_reset\n$fg_reset$bg_light_gray$fg_red$custom$fg_reset "