#!/bin/sh

set -e

out="/etc/nginx/sites-available/autogen"

if ! [ -w "$out" ]; then
	echo "Must have write access to $out."
	exit 1
fi

cp "$out" "$out.bak"
output="$(m4 -P -I ../conf/nginx nginx.m4)"
echo "$output" \
	| sed '/^\s*$/d' \
	| tee "$out" >/dev/null

if ! sudo nginx -t; then
	cp "$out" "../nginx-error.conf"
	echo "Reverting to backup file."
	echo "Bad file saved to nginx-error.conf."
	mv "$out.bak" "$out"
else
	echo "Press enter to restart nginx."
	read _

	echo "Restarting..."
	systemctl restart nginx
fi