Using branch coloration to indicate dirty/clean in oh-my-zsh

cad.zsh-theme

PROMPT='%{$fg_bold[red]%}%m%{$fg_bold[green]%}%p %{$fg[cyan]%}%c %{$fg_bold[blue]%}$(git_prompt_info)%{$fg_bold[blue]%} % %{$reset_color%}'
RPROMPT='%{$reset_color%} %{$fg[yellow]%}$(todo_prompt) %{$reset_color%}'


ZSH_THEME_GIT_PROMPT_PREFIX="(%{$fg[green]%}"
ZSH_THEME_GIT_PROMPT_SUFFIX="%{$fg[blue]%})%{$reset_color%}"
ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[red]%}"
ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg[green]%}"

git.zsh

# get the name of the branch we are on
function git_prompt_info() {
  ref=$(git symbolic-ref HEAD 2> /dev/null) || return
  echo "$ZSH_THEME_GIT_PROMPT_PREFIX$(parse_git_dirty)$ZSH_THEME_GIT_PROMPT_SUFFIX"
}

# Checks if working tree is dirty
parse_git_dirty() {
  ref=$(git symbolic-ref HEAD 2> /dev/null)
  if [[ -n $(git status -s --ignore-submodules=dirty 2> /dev/null) ]]; then
    echo "$ZSH_THEME_GIT_PROMPT_DIRTY${ref#refs/heads/}"
  else
    echo "$ZSH_THEME_GIT_PROMPT_CLEAN${ref#refs/heads/}"
  fi
}