Adjust MangoHud json config file for Proton use on Ubuntu, when MangoHud is installed from git.

mangoadjust.sh

#!/bin/bash

MANGOHUDJSON=${MANGOHUDJSON:-/usr/share/vulkan/implicit_layer.d/MangoHud.json}
MPATH=$(dirname "$MANGOHUDJSON")
MFILE=$(basename "$MANGOHUDJSON" .json)
MANGOHUD32="$MPATH"/"$MFILE"32.json

if [ ! -e "$MANGOHUDJSON" ]; then
	echo "$MANGOHUDJSON file not found"
	exit 1
fi

is32bit_created=false
isLIB_replaced=false

function ismodded() {
	[ -e "$MANGOHUD32" ] && is32bit_created=true
	REPLACED=$(grep \$LIB "$MANGOHUDJSON")
	[ -z "$REPLACED" ] && isLIB_replaced=true
}

case $1 in
do)
	ismodded
	if $is32bit_created; then
		echo 32 bit config already created. skipping
	else
		echo creating 32 bit config
		sudo cp "$MANGOHUDJSON" "$MANGOHUD32"
		echo replacing layer name for 32 bit
		sudo sed -i 's/VK_LAYER_MANGOHUD_overlay/VK_LAYER_MANGOHUD_overlay_32/' "$MANGOHUD32"
		echo replacing \$LIB for 32 bit
		sudo sed -i 's#\\$LIB#lib/i386-linux-gnu#' "$MANGOHUD32"

	fi

	if $isLIB_replaced; then
		echo \$LIB already replaced, skipping
	else
		echo replacing \$LIB for 64 bit
		sudo sed -i 's#\\$LIB#lib/x86_64-linux-gnu#' "$MANGOHUDJSON"
	fi
	;;
undo)
	echo removing 32 bit config
	sudo rm "$MANGOHUD32"
	echo reverting replacement for 64 bit
	sudo sed -i 's#lib/x86_64-linux-gnu#\\$LIB#' "$MANGOHUDJSON"
	;;
*)
	echo "Post-Process MangoHud config for 64 and 32 Bit"
	echo "usage: $0 do - adjust config files"
	echo "       $0 undo - revert changes"
esac