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#!/usr/bin/env dash
# shellcheck disable=SC2086
# shellcheck source=/dev/null
. %SHELL_LIBRARY_PATH
help() {
cat << EOF
--branch | -b [branchname] select a branch to update from.
--help | -h output this help.
EOF
exit "$1";
}
BRANCH="";
while [ "$#" -gt 0 ];do
case "$1" in
"--help" | "-h")
help 0;
;;
"--branch" | "-b")
if [ -n "$2" ];then
BRANCH="$2";
else
error "$1 requires an argument";
help 1;
fi
shift 2;
;;
*)
error "the option $1 does not exist!";
help 1;
;;
esac
done
cd /etc/nixos || die "No /etc/nixos"
[ "$BRANCH" = "" ] || git switch "$BRANCH";
git pull --rebase
nixos-rebuild switch
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