oh-my-zsh/tools/check_for_upgrade.sh

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#!/bin/sh
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PLAT=`uname -s`
function _current_epoch() {
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if [ "$PLAT" = "SunOS" ]
then
echo $(($(perl -e 'print time') / 60 / 60 / 24))
else
echo $(($(date +%s) / 60 / 60 / 24))
fi
}
function _update_zsh_update() {
echo "LAST_EPOCH=$(_current_epoch)" >! ~/.zsh-update
}
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function _upgrade_zsh() {
/usr/bin/env ZSH=$ZSH /bin/sh $ZSH/tools/upgrade.sh
# update the zsh file
_update_zsh_update
}
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epoch_target=$UPDATE_ZSH_DAYS
if [[ -z "$epoch_target" ]]; then
# Default to old behavior
epoch_target=13
fi
[ -f ~/.profile ] && source ~/.profile
# Cancel upgrade if the current user doesn't have write permissions for the
# oh-my-zsh directory.
[[ -w "$ZSH" ]] || return 0
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if [ -f ~/.zsh-update ]
then
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. ~/.zsh-update
if [[ -z "$LAST_EPOCH" ]]; then
_update_zsh_update && return 0;
fi
epoch_diff=$(($(_current_epoch) - $LAST_EPOCH))
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if [ $epoch_diff -gt $epoch_target ]
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then
if [ "$DISABLE_UPDATE_PROMPT" = "true" ]
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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
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fi
fi
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else
# create the zsh file
_update_zsh_update
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fi