Run epson-printer-utility_1.0.2-1lsb3.2_amd64.deb under ubuntu focal, providing missing libQtCore4

epson-printer-utility.sh

#! /bin/bash

# Run epson-printer-utility from epson-printer-utility_1.0.2-1lsb3.2_amd64.deb
# using downloaded libqt4 libraries from previous Ubuntu version (not provided
# in Ubuntu 20.04 "focal fossa"
#
# This downloads the deb files and extracts them in a libs directory in the
# current directory, and then runs the utility
#
# Fix for:
# epson-printer-utility: error while loading shared libraries: libQtCore.so.4: cannot open shared object file: No such file or directory

DEBS='
    http://mirrors.kernel.org/ubuntu/pool/universe/q/qt4-x11/libqtgui4_4.8.7+dfsg-7ubuntu3_amd64.deb
    http://mirrors.kernel.org/ubuntu/pool/universe/q/qt4-x11/libqtcore4_4.8.7+dfsg-7ubuntu3_amd64.deb
'
cd `dirname $0`
mkdir -p libs
cd libs

echo "## `pwd`"
if ! [ -f data.tar.zx ] ; then
    for DEB in $DEBS; do
        FILE="${DEB/*\/}"
        [ -f "$FILE" ] && continue
        echo "## download $DEB"
        wget $DEB
        echo "## extract $FILE"
        ar x $FILE
        tar -xJf data.tar.xz
        rm control.tar.xz  data.tar.xz debian-binary
    done
fi

echo "## run epson-printer-utility with `pwd`"
LD_LIBRARY_PATH=`pwd`/./usr/lib/x86_64-linux-gnu epson-printer-utility