git dirty prompt with a flash!

git_status.sh

# http://henrik.nyh.se/2008/12/git-dirty-prompt
# http://www.simplisticcomplexity.com/2008/03/13/show-your-git-branch-name-in-your-prompt/
# 
# boosty likes it like that:
#   ~/dev/dir[master]$   # clean working directory
#   ~/dev/dir[master⚡]$  # dirty working directory

function parse_git_dirty {
  [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit, working directory clean" ]] && echo "⚡"
}
function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/[\1$(parse_git_dirty)]/"
}
export PS1='\[\033[1;33m\]\w\[\033[0m\]$(parse_git_branch)$ '