little script to set stl as default starter for every steam game. works with a copy of the steam config

STLsetDefault.sh

#!/bin/bash

YOURID=0
SUD="$HOME/.steam/steam/userdata/"
LCVDFO="$SUD/$YOURID/config/localconfig.vdf"
LCVDF="/tmp/localconfig.vdf"

LOPT="\\\t\t\t\t\t\t\"LaunchOptions\"		\"stl %command%\""

if [ -n "$1" ]; then
	if [ -f "$SUD/$1/config/localconfig.vdf" ]; then
		echo "argument1 $1 seems to be your steamID"
		YOURID="$1"
		LCVDFO="$SUD/$YOURID/config/localconfig.vdf"
	else
		echo "argument1 $1 doesn't seem to be your steamID - $SUD/$1/config/localconfig.vdf does not exist!"
	fi
fi

if [ "$YOURID" -eq 0 ]; then
	echo "you have to edit YOURID first, to match the directory name of your steamID or provide it as commandline argument 1- exit"
	echo "maybe:"
	find "$SUD" -maxdepth 1 -type d -name "[1-9]*"
	exit 1
fi

if [ ! -f "$LCVDF" ]; then
	echo "$LCVDF doesn't exist - copying the original"
	if [ ! -f "$LCVDFO" ]; then
		echo "$LCVDFO doesn't exist as well - giving up"
		exit 1
	else
	cp "$LCVDFO" "$LCVDF"
	fi
fi

sed -i '/LaunchOptions/d' "$LCVDF"
sed -i '/"Play[Tt]ime"/i '"$LOPT"'' "$LCVDF"

echo "done - you might want to check if the file $LCVDF looks valid before using it!"
echo "make sure to close steam before copying the file!"
echo "create a backup of your unmodified $LCVDFO f.e. with this command:"
echo "cp $LCVDFO $LCVDFO.bak"
echo "if you dare update to the modified stl version with this command (you at your own risk!):"
echo "cp $LCVDF $LCVDFO"

@frostworx Steam seems to use playTime instead of Playtime now for line 38.

@Confetti-Camouflage Thanks, should be fixed.