#!/usr/bin/env bash

FAKEWGIF=nanoswg
FAKEWGIF+=$RANDOM
FAKEWGIFPATH=/var/run/wireguard/$FAKEWGIF.sock

if [ $# -ne 1 ]; then
    echo "Usage: $0 <wg-config-file>"
    exit 1
fi

if [ ! -f "$1" ]; then
    echo "Unable to parse config file: '$1' not found"
    exit 1
fi

if ! command -v wg > /dev/null
then
    echo 'Unable to parse config file: missing 'wg' config tool'
    exit 1
fi

nc -lkUW1 $FAKEWGIFPATH &
NCPID=$!
until [ -S $FAKEWGIFPATH ]
do
    :
done

wg setconf $FAKEWGIF $1 2>&1 | grep -v "Unable to modify interface"
{ kill $NCPID && wait; } 2>/dev/null
rm $FAKEWGIFPATH