Bash Git Prompt showing dirty state & branch

.bash_git_prompt

# Detect whether the current directory is a git repository.
function is_git_repository {
  git branch > /dev/null 2>&1
}

function parse_git_dirty {
  [[ -z $(git status --porcelain) ]] || echo "*"
}
function parse_git_branch {
  # Set the BRANCH variable.
  if is_git_repository ; then
    git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/[\1$(parse_git_dirty)]/"
  fi
}
export PS1='\u@\h \[\033[1;33m\]\w\[\033[0m\]$(parse_git_branch)$ '