install

#!/usr/bin/env bash
set -eo pipefail; [[ -n "$PLUSHU_TRACE" ]] && set -x

mkdir -p "$PLUSHU_ROOT/nginx/main"
mkdir -p "$PLUSHU_ROOT/nginx/events"
mkdir -p "$PLUSHU_ROOT/nginx/http"
mkdir -p "$PLUSHU_ROOT/nginx/mail"
mkdir -p "$PLUSHU_ROOT/ssl"

# If there's no pre-existing nginx.conf
if [[ ! -f "$PLUSHU_ROOT/nginx/nginx.conf" ]]; then
  # Make a basic conf that reads from the directory for the main block
  cat > "$PLUSHU_ROOT/nginx/nginx.conf" <<EOF
include main/*.conf;
EOF
fi

# Make configs in the main block for reading the other 3 block directories
if [[ ! -f "$PLUSHU_ROOT/nginx/main/20_events.conf" ]]; then
  cat > "$PLUSHU_ROOT/nginx/main/20_events.conf" <<EOF
events { include events/*.conf; }
EOF
fi
if [[ ! -f "$PLUSHU_ROOT/nginx/main/25_http.conf" ]]; then
  cat > "$PLUSHU_ROOT/nginx/main/25_http.conf" <<EOF
http { include http/*.conf; }
EOF
fi
if [[ ! -f "$PLUSHU_ROOT/nginx/main/30_mail.conf" ]]; then
  cat > "$PLUSHU_ROOT/nginx/main/30_mail.conf" <<EOF
mail { include mail/*.conf; }
EOF
fi

# Make sure we disable daemonization - docker wants nginx in the foreground
if [[ ! -f "$PLUSHU_ROOT/nginx/main/15_daemon-off.conf" ]]; then
  cat > "$PLUSHU_ROOT/nginx/main/15_daemon-off.conf" <<EOF
daemon off;
EOF
fi

if [[ "$EUID" == 0 ]]; then
  chown -R "$PLUSHU_USER:" "$PLUSHU_ROOT/nginx"
  chown -R "$PLUSHU_USER:" "$PLUSHU_ROOT/ssl"
fi

docker rm -f plushu-nginx >/dev/null 2>&1 || :
docker pull nginx
docker run --name plushu-nginx --net=host \
  -v "$PLUSHU_ROOT/nginx:/usr/local/nginx/etc" \
  -v "$PLUSHU_ROOT/ssl:/usr/local/nginx/etc/ssl" \
  -d --entrypoint=nginx nginx -c /usr/local/nginx/etc/nginx.conf >/dev/null

setup_systemd () {
  cat >/etc/systemd/system/multi-user.target.wants/plushu-nginx-container.service \
<<EOF
[Unit]
After=docker.service

[Service]
User=$PLUSHU_USER
ExecStart=docker start plushu-nginx
EOF
}

setup_upstart () {
  cat >/etc/init/plushu-nginx-container.conf <<EOF
start on filesystem and started docker
stop on runlevel [!2345]
setuid $PLUSHU_USER
pre-start script
  while [ ! -e /var/run/docker.sock ] ; do
    command -v inotifywait >/dev/null 2>&1 &&
      inotifywait -t 2 -e create /var/run || sleep 1
  done
end script
exec docker start plushu-nginx
EOF
  if ! command -v inotifywait >/dev/null 2>&1; then
    echo "Protip: install inotify-tools to start as soon as possible at boot"
  fi
}

if [[ "$EUID" == 0 ]]; then
  if command -v systemctl >/dev/null 2>&1; then
    setup_systemd
  elif command -v initctl >/dev/null 2>&1; then
    setup_upstart
  else
    echo "You don't appear to be using systemd or upstart; we don't have a"
    echo "file to start the Nginx container at startup for any other init"
    echo "system. Feel free to contribute one."
  fi
else
  echo "Re-install this plugin as root to set the container to run at boot."
fi