find_git_branch() {
   local branch
   # Based on: http://stackoverflow.com/a/13003854/170413
   if branch=$(git rev-parse --abbrev-ref HEAD 2> /dev/null)
   then
      if [[ "$branch" == "HEAD" ]]; then
         branch='(detached head)'
      fi
      git_branch="($branch)"
   else
      git_branch=""
   fi
}

find_git_dirty() {
  if [[ -z "$git_branch" ]]
  then
    git_dirty=''
  else
    # Based on: http://stackoverflow.com/a/2659808/170413
    local err
    if err=$(git diff-files --quiet 2>&1)
    then
      if git diff-index --quiet --cached HEAD
      then
        git_dirty=''
      else
        # Can't figure out different colors
        git_dirty="^"
      fi
    elif [ -n "$err" ]
    then
      # Some error - most likely that it was run within $GIT_DIR
      # Resolve repo root instead? `git rev-parse --git-dir` does not work, nor does the 'git root' alias trick
      git_dirty=""
    else
      git_dirty="*"
    fi
  fi
}

PROMPT_COMMAND="find_git_branch; find_git_dirty; $PROMPT_COMMAND"

# Default Git enabled prompt with dirty state
# export PS1="\u@\h \w \[$txtcyn\]\$git_branch\[$txtred\]\$git_dirty\[$txtrst\]\$ "

# Another variant:
# export PS1="\[$bldgrn\]\u@\h\[$txtrst\] \w\[$bldylw\]\$git_branch\[$txtcyn\]\$git_dirty\[$txtrst\]\$ "

# Default Git enabled root prompt (for use with "sudo -s")
# export SUDO_PS1="\[$bakred\]\u@\h\[$txtrst\] \w\$ "