Script to connect to Wireguard VPN

connect-wireguard-vpn.sh

#!/usr/bin/env bash

die() {
	echo "[-] Error: $1" >&2
	exit 1
}

PROGRAM="${0##*/}"
ARGS=( "$@" )
SELF="${BASH_SOURCE[0]}"
[[ $SELF == */* ]] || SELF="./$SELF"
SELF="$(cd "${SELF%/*}" && pwd -P)/${SELF##*/}"
[[ ${BASH_VERSINFO[0]} -ge 4 ]] || die "bash ${BASH_VERSINFO[0]} detected, when bash 4+ required"
[[ $UID == 0 ]] || exec sudo -p "[?] $PROGRAM must be run as root. Please enter the password for %u to continue: " -- "$BASH" -- "$SELF" "${ARGS[@]}"

type wg-quick >/dev/null || die "Please install wireguard (wg-quick) and then try again."
type curl >/dev/null || die "Please install curl and then try again."

set -e

VPN_PROFILE_NAME="br-sao-wg-201"
CONNECTED_TEST_URL="https://am.i.mullvad.net/connected"
WG_DIR="/etc/wireguard"
PREVPWD="$(pwd)"

cd "${WG_DIR}" || die "Unable to cd to ${WG_DIR}"

[[ -f "${WG_DIR}/${VPN_PROFILE_NAME}.conf" ]] || die "Unable to find Wireguard VPN profile: ${VPN_PROFILE_NAME} at ${WG_DIR}/${VPN_PROFILE_NAME}.conf"

while [[ $# -gt 0 ]]; do
	key="$1"

	case $key in
		-c|--connect)
				sudo wg-quick up "${VPN_PROFILE_NAME}"   || die "Unable to connect to VPN: ${VPN_PROFILE_NAME}"
				shouldtest=1
				;;
		-d|--disconnect)
				sudo wg-quick down "${VPN_PROFILE_NAME}" || die "Unable to disconnect to VPN: ${VPN_PROFILE_NAME}"
				;;
		-t|--test)
				shouldtest=1
				;;
		*)
				# Default case: unknown option
				die "Unknown option: $key      Options: [-c|--connect] [-d|--disconnect] [-t|--test]"
				;;
	esac
	shift
done

if [[ -z "${shouldtest}" ]]; then
  printf "Not testing connection\n"
else
  curl "${CONNECTED_TEST_URL}" || die "Unable to test if you are connected to the VPN. Try running this command again:  curl https://am.i.mullvad.net/connected"
fi

cd "${PREVPWD}" || die "Unable to cd to previous directory: ${PREVPWD}"