ohmyzsh/tools/check_for_upgrade.sh

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#!/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 $ZSH/tools/upgrade.sh
# update the zsh file
_update_zsh_update
}
epoch_target=$UPDATE_ZSH_DAYS
if [[ -z "$epoch_target" ]]; then
# Default to old behavior
epoch_target=13
fi
[ -f ~/.profile ] && source ~/.profile
if [ -f ~/.zsh-update ]
then
. ~/.zsh-update
# cancel update if the current user doesn't have write permissions for the
# oh-my-zsh directory
if [ -n $(find -not -writable "$ZSH") ]
then
return 0;
fi
if [[ -z "$LAST_EPOCH" ]]; then
_update_zsh_update && return 0;
fi
epoch_diff=$(($(_current_epoch) - $LAST_EPOCH))
if [ $epoch_diff -gt $epoch_target ]
then
if [ "$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
else
_update_zsh_update
fi
fi
fi
else
# create the zsh file
_update_zsh_update
fi