gistfile1.txt

#! /bin/bash

RED="\[\033[0;31m\]"
YELLOW="\[\033[1;33m\]"
GREEN="\[\033[1;32m\]"

BLUE="\[\033[1;34m\]"
DARK_GREY="\[\033[0;30m\]"
LIGHT_GREY="\[\033[0;37m\]"
NORMAL="\[\033[0m\]"

function parse_git_branch {
  git_status="$(git status 2> /dev/null)"
  pattern="^# On branch ([^${IFS}]*)"

  if [[ ${git_status} =~ ${pattern} ]]; then
    branch=${BASH_REMATCH[1]}

    if [[ $(parse_git_dirty) == 'clean' ]]; then
      result="${GREEN}[${branch}]${NORMAL}"
    else
      result="${RED}[${branch}]${NORMAL}"
    fi

    echo " ${result}"
  fi
}

function parse_git_dirty {
  git_status="$(git status 2> /dev/null)"

  if [[ ${git_status} =~ "working directory clean" ]]; then
    echo 'clean'
  else
    echo 'dirty'
  fi
}

export PS1="$DARK_GREY[\@]$NORMAL \u$LIGHT_GREY@$NORMAL\h:$BLUE\w$NORMAL\$(parse_git_branch)$ "