A simple 2-line theme for oh-my-zsh.

tjkirch-with-ruby.zsh-theme

function _update_ruby_version()
{
    typeset -g ruby_version=''
    if which rvm-prompt &> /dev/null; then
      ruby_version="$(rvm-prompt i v g)"
      rvm-prompt i v g
    else
      if which rbenv &> /dev/null; then
        ruby_version="$(rbenv version | sed -e "s/ (set.*$//")"
      fi
    fi
}
chpwd_functions+=(_update_ruby_version)
_update_ruby_version

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

function prompt_char {
	if [ $UID -eq 0 ]; then echo "%{$fg[red]%}#%{$reset_color%}"; else echo $; fi
}

PROMPT='%(?, ,%{$fg[red]%}FAIL: $?%{$reset_color%}
)
%{$fg[magenta]%}%n%{$reset_color%}@%{$fg[yellow]%}%m%{$reset_color%}: %{$fg_bold[blue]%}%~%{$reset_color%}$(git_prompt_info) %{$fg_bold[red]%}(Ruby: $ruby_version)%{$reset_color%}
%_$(prompt_char) '

RPROMPT='%{$fg[green]%}[%*]%{$reset_color%}'

Hi, i'm trying to understand the following piece of code:
PROMPT='%(?, ,%{$fg[red]%}FAIL: $?%{$reset_color%})
Here i understand the part: %{$fg[red]%} making the text red and $? for providing the return code. And after that the reset of the color.
that taken out it would leave:
PROMPT='%(?, ,FAIL: $?)

Could you explain what this part means?
Thanks in advance.

[Answer found]
Always good to find your own answer. Finding this part: "%(x.true-text.false-text)".
thanks anyway for providing a nice theme. 👍