improvement: define PROMPT_HOST once on startup

themes/jnrowe.zsh-theme

-autoload -U colors && colors
 autoload -U add-zsh-hook
 autoload -Uz vcs_info
 
+zstyle ':vcs_info:*' disable-patterns "/usr/(ports|src)(|/*)"
 zstyle ':vcs_info:*' actionformats \
        '%F{5}(%f%s%F{5})%F{3}-%F{5}[%F{2}%b%F{3}|%F{1}%a%F{5}]%f '
-zstyle ':vcs_info:*' formats \
-    '%F{2}%s%F{7}:%F{2}(%F{1}%b%F{2})%f '
+zstyle ':vcs_info:*' formats '%F{2}%s%F{7}:%F{2}(%F{1}%b%F{2})%f '
 zstyle ':vcs_info:(sv[nk]|bzr):*' branchformat '%b%F{1}:%F{3}%r'
 zstyle ':vcs_info:*' enable git
 
 add-zsh-hook precmd prompt_vcs
-add-zsh-hook precmd prompt_host
 
 prompt_vcs () {
     vcs_info
@@ -26,17 +24,16 @@ prompt_vcs () {
     fi
 }
 
-prompt_host () {
+function {
     if [[ -n "$SSH_CLIENT" ]]; then
-        host=" ($HOST)"
+        PROMPT_HOST=" ($HOST)"
     else
-        host=''
+        PROMPT_HOST=''
     fi
 }
 
-
 local ret_status="%(?:%{$fg_bold[green]%}Ξ:%{$fg_bold[red]%}%S↑%s%?)"
 
-PROMPT='${ret_status}%{$fg[blue]%}${host}%{$fg_bold[green]%}%p %{$fg_bold[yellow]%}%2~ ${vcs_info_msg_0_}${dir_status}%{$reset_color%} '
+PROMPT='${ret_status}%{$fg[blue]%}${PROMPT_HOST}%{$fg_bold[green]%}%p %{$fg_bold[yellow]%}%2~ ${vcs_info_msg_0_}${dir_status}%{$reset_color%} '
 
 #  vim: set ft=zsh ts=4 sw=4 et: