File myrlyn-run0 of Package branding-zeus

#!/bin/bash
#
# Wrapper around systemd 'run0' for Myrlyn that can open a graphical password
# prompt and that can keep the connection to the display (X11 or Wayland) alive
# as well as some well-defined environment variables.
#
# EXPERIMENTAL - use at your own risk!
#
# Inspired by pull request #122 by @zeusgoose
#
# Author:  Stefan Hundhammer <Stefan.Hundhammer@gmx.de>
# License: GPL V2

MYRLYN_ARGS=$*

# Environment variables to keep for the 'run0' call,
# taken from 'myrlyn-sudo'
ENV_KEEP="DISPLAY WAYLAND_DISPLAY XAUTHORITY XDG_RUNTIME_DIR \
QT_QPA_PLATFORMTHEME QT_ENABLE_HIGHDPI_SCALING QT_SCALE_FACTOR \
LANG LC_MESSAGES LC_COLLATE LC_NUMERIC LC_TIME LC_ALL LANGUAGE"

# Additional environment variables not used in 'myrlyn-sudo'
ENV_KEEP="$ENV_KEEP XDG_SEAT"

# Build the environment args for run0 from the above variables:
# --setenv=DISPLAY --setenv=LANG ...

ENV_ARGS=""

for VAR in $ENV_KEEP; do
    # Uncomment for debugging
    # echo "$VAR=${!VAR}"
    ENV_ARGS="$ENV_ARGS --setenv=$VAR"
done

# Prevent changing ownership to root of the user's
# ~/.config/openSUSE/Myrlyn.conf
ENV_ARGS="$ENV_ARGS --setenv=HOME=`realpath ~root`"

# Uncomment for debugging
# echo $ENV_ARGS | tr ' ' '\n'


RUN0_ARGS="--unit=Myrlyn"

run0 $RUN0_ARGS $ENV_ARGS /usr/bin/myrlyn $MYRLYN_ARGS