.bashrc

# http://henrik.nyh.se/2008/12/git-dirty-prompt
# http://www.simplisticcomplexity.com/2008/03/13/show-your-git-branch-name-in-your-prompt/
#   username@Machine ~/dev/dir[master]$   # clean working directory
#   username@Machine ~/dev/dir[master*]$  # dirty working directory
# bsag: I combined the best of both worlds and used the parse_git_dirty function here:
# http://www.simplisticcomplexity.com/2008/03/13/show-your-git-branch-name-in-your-prompt/#comment-4166
# as well as various other mods from the forks of this gist.

function parse_git_dirty {
  git diff --quiet HEAD &>/dev/null
  [[ $? == 1 ]] && echo "*"
}
function parse_git_branch {
  ref=$(git-symbolic-ref HEAD 2> /dev/null) || return
  echo ${ref#refs/heads/}
}

# 3 line prompt:
# >>> {bash history number} {username}@{host}
# {time} {working directory}
# [git branch and state] $
# and titlebar:
#   user@host:working directory
#
# PS1 set in function so you can choose to not set the fancy prompt for
# certain situations.

function set_prompt {
    # ANSI escape codes documented in:
    # http://en.wikipedia.org/wiki/ANSI_escape_code
    case $TERM in
      xterm*)
      TITLEBAR='\[\033]0;\u@\h:$(dirs)\007\]'
      ;;
      *)
      TITLEBAR=""
      ;;
    esac
    local     REDBOLD="\[\033[1;31m\]"
    local       WHITE="\[\033[0;37m\]"
    local  YELLOWBOLD="\[\033[1;33m\]"
    local      NORMAL="\[\033[0m\]"
    export PS1="${TITLEBAR}\
$REDBOLD>>> \! $WHITE\u@\h\n\
 $WHITE\@ $YELLOWBOLD\$(dirs)\n\
 [\$(parse_git_branch)\$(parse_git_dirty)] \$$NORMAL "
}
set_prompt