#
  # Based on Geoffrey Grosenbach's peepcode zsh theme from
  # https://github.com/topfunky/zsh-simple
  #
  
  git_repo_path() {
    git rev-parse --git-dir 2>/dev/null
  }
  
  git_commit_id() {
    git rev-parse --short HEAD 2>/dev/null
  }
  
  git_mode() {
    if [[ -e "$repo_path/BISECT_LOG" ]]; then
      echo "+bisect"
    elif [[ -e "$repo_path/MERGE_HEAD" ]]; then
      echo "+merge"
    elif [[ -e "$repo_path/rebase" || -e "$repo_path/rebase-apply" || -e "$repo_path/rebase-merge" || -e "$repo_path/../.dotest" ]]; then
      echo "+rebase"
    fi
  }
  
  git_dirty() {
    if [[ "$repo_path" != '.' && `git ls-files -m` != "" ]]; then
      echo " %{$fg_bold[grey]%}✗%{$reset_color%}"
    fi
  }
  
  git_prompt() {

    local cb=$(git_current_branch)

    if [ -n "$cb" ]; then
      local repo_path=$(git_repo_path)
      echo " %{$fg_bold[grey]%}$cb %{$fg[white]%}$(git_commit_id)%{$reset_color%}$(git_mode)$(git_dirty)"
    fi
  }
  
  local smiley="%(?,%{$fg[green]%}☺%{$reset_color%},%{$fg[red]%}☹%{$reset_color%})"
  
  PROMPT='
  %~
  ${smiley}  %{$reset_color%}'
  
  RPROMPT='%{$fg[white]%} $(~/.rvm/bin/rvm-prompt)$(git_prompt)%{$reset_color%}'