#!/bin/bash
# Build dns-monitor, check config.toml against live DNS, then install and restart the service.
# Aborts before touching the running service if the build, tests or config check fail.
set -euo pipefail
cd "$(dirname "$(readlink -f "$0")")"
. "$HOME/.cargo/env"

cargo test -q
cargo build --release -q

# Parse the config and print the DNS changes it would make, without making them.
( set -a; . /etc/dns-monitor/env; set +a
  ./target/release/dns-monitor --config config.toml --once --dry-run )

install -m755 target/release/dns-monitor /usr/local/bin/dns-monitor
install -m644 dns-monitor.service /etc/systemd/system/dns-monitor.service
ln -sfn "$PWD/config.toml" /etc/dns-monitor/config.toml
systemctl daemon-reload
systemctl enable -q dns-monitor
systemctl restart dns-monitor
systemctl is-active dns-monitor