dotfiles/check_for_upgrade.sh
David Todd (c0de) 56444c027c Finalize automatic updates
All instances of dotfiles from this point forward will
now ask to update automatically every 2 weeks

Delete ~/.dotfiles-update to restart the counter
2018-02-10 23:20:15 -06:00

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#!/usr/bin/env zsh
zmodload zsh/datetime
function _current_epoch() {
echo $(( $EPOCHSECONDS / 60 / 60 / 24 ))
}
function _update_dotfiles_update() {
echo "export LAST_EPOCH=$(_current_epoch)" > ${HOME}/.dotfiles-update
echo "touched ~/.dotfiles-update"
}
function _upgrade_dotfiles() {
env _DOTFILES=$_DOTFILES sh $_DOTFILES/upgrade.sh
# update the zsh file
_update_dotfiles_update
}
# Configure this in shell/env
epoch_target=$UPDATE_DOTFILES_DAYS
if [[ -z "$epoch_target" ]]; then
# Default to every 2 weeks
epoch_target=13
fi
# Cancel upgrade if the current user doesn't have
# write permissions for the dotfiles directory.
if [[ -w "$_DOTFILES" ]]; then
else
echo "You can't write to $(_dotfiles)!"
return 1
fi
# Cancel upgrade if git is unavailable on the system
if [[ $(whence git >/dev/null) || false ]]; then
else
echo "git is not available"
return 2
fi
if mkdir -p "$_DOTFILES/update.lock" 2>/dev/null; then
if [ -f ${HOME}/.dotfiles-update ]; then
. ${HOME}/.dotfiles-update
if [[ -z "$LAST_EPOCH" ]]; then
echo "Missing \$LAST_EPOCH"
_update_dotfiles_update && return 0;
fi
epoch_diff=$(($(_current_epoch) - $LAST_EPOCH))
if [ $epoch_diff -gt $epoch_target ]; then
if [ "$DISABLE_UPDATE_PROMPT" = "true" ]; then
_upgrade_dotfiles
else
echo "[Dotfiles] Would you like to check for updates? [Y/n]: \c"
read line
if [[ "$line" == Y* ]] || [[ "$line" == y* ]] || [ -z "$line" ]; then
_upgrade_dotfiles
else
_update_dotfiles_update
fi
fi
fi
else
echo "Missing ~/.dotfiles-update"
# create the zsh file
_update_dotfiles_update
fi
rmdir $_DOTFILES/update.lock
fi