#! /usr/bin/env sh
set -e

base_dir="$(git rev-parse --show-toplevel)"

user="${1-$USER}"
hosts="${2-server2 server3}"
branch="${3-main}"

for host in $hosts; do
    echo "Updating '$user@$host.vhack.eu' ..."

    new_system="$(nix build ".#nixosConfigurations.$host.config.system.build.toplevel" --no-link --print-out-paths)"

    printf "Copying closure ..\n"
    nix-copy-closure "$user@$host.vhack.eu" "$new_system"

    printf "Deploying remote side script ..\n"
    scp "$base_dir/scripts/update_hosts.remote" "$user@$host.vhack.eu:update_host.remote"

    printf "Executing remote side script ..\n"
    ssh -t "$user@$host.vhack.eu" "chmod +x update_host.remote; ./update_host.remote '$branch'"
done
# vim: ft=sh