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#!/usr/bin/env dash
# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="2.1.2" . %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 "$1"
}
default_branch=$(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/ *$//g' >"$default_branch" &
msg2 "Updating system..."
if [ -n "$MODE" ]; then
nixos-rebuild "$MODE"
else
nixos-rebuild switch
fi
git switch "$(cat "$default_branch")" >/dev/null 2>&1 && msg2 "Switched to branch '$(cat "$default_branch")'"
msg "Finished Update!"
# vim: ft=sh
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