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#!/usr/bin/env dash
# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="1.1.3" . %SHELL_LIBRARY_PATH
help() {
cat << EOF
This is a NixOS System flake update manager.
Usage:
$NAME [--branch <branchname>] [--help]
Options:
--branch | -b BRANCHNAME
select a branch to update from.
--mode | -m MODE
select a mode to update with
--help | -h
output this help.
EOF
exit "$1";
}
tmp=$(mktmp);
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;
;;
"--mode" | "-m")
if [ -n "$2" ];then
MODE="$2";
else
error "$1 requires an argument";
help 1;
fi
shift 2;
;;
*)
error "the option $1 does not exist!";
help 1;
;;
esac
done
cd /etc/nixos || die "No /etc/nixos";
msg "Starting system update...";
git remote update origin --prune > /dev/null 2>&1;
if ! [ "$BRANCH" = "" ];then
git switch "$BRANCH" > /dev/null 2>&1 && msg2 "Switched to branch '$BRANCH'";
fi
msg2 "Updating git repository...";
git pull --rebase;
git remote show origin | grep 'HEAD' | cut -d':' -f2 | sed -e 's/^ *//g' -e 's/ *$//g' > $tmp &
msg2 "Updating system...";
if [ -n "$MODE" ]; then
nixos-rebuild "$MODE";
else
nixos-rebuild switch;
fi
git switch "$(cat $tmp)" > /dev/null 2>&1 && msg2 "Switched to branch '$(cat $tmp)'";
msg "Finished Update!";
# vim: ft=sh
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