fix prompt substitutions/expansions

The 'prompt' function disables any option set with 'setopt'.
To make options persistent we need to use the 'prompt_opts' array
instead

Closes #8

modules/prompt/themes/gitster.zsh-theme

@@ -3,6 +3,9 @@
 # https://github.com/shashankmehta/dotfiles/blob/master/thesetup/zsh/.oh-my-zsh/custom/themes/gitster.zsh-theme
 #
 
+autoload -Uz colors && colors
+prompt_opts=( cr subst percent )
+
 local ret_status="%(?:%{$fg_bold[green]%}➜ :%{$fg_bold[red]%}➜ %s)"
 
 function get_pwd(){
@@ -20,7 +23,7 @@ function get_pwd(){
   print $prompt_short_dir
 }
 
-PROMPT="$ret_status %{$fg[white]%}$(get_pwd) $(git_prompt_info)%{$reset_color%}%{$reset_color%} "
+PROMPT='$ret_status %{$fg[white]%}$(get_pwd) $(git_prompt_info)%{$reset_color%}%{$reset_color%} '
 
 ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg[cyan]%}"
 ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}"

modules/prompt/themes/minimal.zsh-theme

@@ -5,7 +5,7 @@
 
 autoload -Uz colors && colors
 
-setopt prompt_subst
+prompt_opts=( cr subst percent )
 
 PROMPT_CHAR="❯"
 
@@ -98,6 +98,6 @@ zle -N zle-line-init
 zle -N zle-keymap-select
 zle -N zle-line-finish
 
-PROMPT="$(prompt_user)$(prompt_jobs)$(prompt_vimode)$(prompt_status) "
-RPROMPT="$(prompt_path)$(prompt_git)"
+PROMPT='$(prompt_user)$(prompt_jobs)$(prompt_vimode)$(prompt_status) '
+RPROMPT='$(prompt_path)$(prompt_git)'
 

modules/prompt/themes/steeef.zsh-theme

@@ -14,7 +14,7 @@ function virtualenv_info {
 }
 PR_GIT_UPDATE=1
 
-setopt prompt_subst
+prompt_opts=( cr subst percent )
 
 autoload -Uz add-zsh-hook
 autoload -Uz vcs_info
@@ -96,6 +96,6 @@ function steeef_precmd {
 }
 add-zsh-hook precmd steeef_precmd
 
-PROMPT="
+PROMPT='
 %{$purple%}%n${${reset_color}%} at %{$orange%}%m${${reset_color}%} in %{$limegreen%}%~${${reset_color}%} $vcs_info_msg_0_$(virtualenv_info)%{${reset_color}%}
-$ "
+$ '