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#!/usr/bin/env bash
source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
usage() {
cat <<EOS
$(help_synopsis "channel" "checkout-generation [-h] [-g <n>]")
-g <n> Generation to checkout
-h Show this help and exit
$(help_end "channel")
EOS
}
# no generation by now
GEN=
while getopts "hg:" OPTION
do
case $OPTION in
g)
GEN=$OPTARG
stdout "GEN = $GEN"
;;
h)
usage
exit 0
;;
*)
;;
esac
done
[[ -z "$GEN" ]] && stderr "No generation number passed" && exit 1
CHANNELS=/nix/var/nix/profiles/per-user/root/channels
stdout "Executing checkout. Password cache will be reset afterwards"
explain sudo nix-env -p $CHANNELS --switch-generation $GEN
stdout "Resetting sudo password"
sudo -k
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