# *_prompt_info functions for usage in your prompt
  #
  # Plugin creators, please add your *_prompt_info function to the list
  # of dummy implementations to help theme creators not receiving errors
  # without the need of implementing conditional clauses.
  #
  # See also lib/bzr.zsh, lib/git.zsh and lib/nvm.zsh for
  # git_prompt_info, bzr_prompt_info and nvm_prompt_info
  
  # Dummy implementations that return false to prevent command_not_found
  # errors with themes, that implement these functions
  # Real implementations will be used when the respective plugins are loaded
  function chruby_prompt_info hg_prompt_info pyenv_prompt_info \
    rbenv_prompt_info svn_prompt_info vi_mode_prompt_info \
    virtualenv_prompt_info {
    return 1
  }
  
  # oh-my-zsh supports an rvm prompt by default
  # get the name of the rvm ruby version
  function rvm_prompt_info() {
    [ -f $HOME/.rvm/bin/rvm-prompt ] || return 1
    local rvm_prompt
    rvm_prompt=$($HOME/.rvm/bin/rvm-prompt ${=ZSH_THEME_RVM_PROMPT_OPTIONS} 2>/dev/null)
    [[ "${rvm_prompt}x" == "x" ]] && return 1
    echo "${ZSH_THEME_RVM_PROMPT_PREFIX:=(}${rvm_prompt}${ZSH_THEME_RVM_PROMPT_SUFFIX:=)}"
  }
  
  # use this to enable users to see their ruby version, no matter which
  # version management system they use
  function ruby_prompt_info() {
    echo $(rvm_prompt_info || rbenv_prompt_info || chruby_prompt_info)
  }