Bash script to run a X application in Docker

xid.sh

#!/bin/bash

USER_ID=$(id  -u "$(whoami)")
GROUP_ID=$(id -g "$(whoami)")

XSOCK=/tmp/.X11-unix
XAUTH=$(mktemp /tmp/docker.xauth.XXXX)

trap 'rm $XAUTH; ' EXIT

xauth nlist "$DISPLAY" \
  | sed -e 's/^..../ffff/' \
  | xauth -f "$XAUTH" nmerge -

docker run \
  --env QT_X11_NO_MITSHM=1 \
  --env DISPLAY="unix${DISPLAY}" \
  --env XAUTHORITY="${XAUTH}" \
  --user "${USER_ID}:${GROUP_ID}" \
  --volume "$XSOCK:$XSOCK:rw" \
  --volume "$XAUTH:$XAUTH:rw" \
  "${@}" \
  ;