Podman with non-root GUI

podman-gui-noroot.sh

#!/bin/bash

args="${@}"

container=<container>:<release>

uid=$( podman run --rm -it $container id -u | tr -d [:space:] )
gid=$uid

subuidSize=$(( $(podman info --format "{{ range .Host.IDMappings.UIDMap }}+{{.Size }}{{end }}" ) - 1 ));
subgidSize=$(( $(podman info --format "{{ range .Host.IDMappings.GIDMap }}+{{.Size }}{{end }}" ) - 1 ));

podman run \
  -it \
  --rm \
  -e DISPLAY \
  -v /tmp/.X11-unix:/tmp/.X11-unix:ro \
  --uidmap $uid:0:1 \
  --uidmap 0:1:$uid \
  --uidmap $(($uid+1)):$(($uid+1)):$(($subuidSize-$uid)) \
  --gidmap $gid:0:1 \
  --gidmap 0:1:$gid \
  --gidmap $(($gid+1)):$(($gid+1)):$(($subgidSize-$gid)) \
  $container $args