#!/bin/sh
 

 function _current_epoch() {
   echo $(($(date +%s) / 60 / 60 / 24))
 }
 
 function _update_zsh_update() {
   echo "LAST_EPOCH=$(_current_epoch)" > ~/.zsh-update
 }

 function _upgrade_zsh() {
   /usr/bin/env ZSH=$ZSH /bin/sh $ZSH/tools/upgrade.sh
   # update the zsh file
   _update_zsh_update
 }
 

 if [ -f ~/.zsh-update ]
 then

   . ~/.zsh-update

 
   if [[ -z "$LAST_EPOCH" ]]; then
     _update_zsh_update && return 0;
   fi
 

   epoch_diff=$(($(_current_epoch) - $LAST_EPOCH))

   if [ $epoch_diff -gt 6 ]
   then

     if [ "$DISABLE_UPDATE_PROMPT" = "true" ]

     then

       _upgrade_zsh
     else
       echo "[Oh My Zsh] Would you like to check for updates?"
       echo "Type Y to update oh-my-zsh: \c"
       read line
       if [ "$line" = Y ] || [ "$line" = y ]
       then
         _upgrade_zsh
       fi

     fi
   fi

 else
   # create the zsh file
   _update_zsh_update

 fi