Update every game's proton version.

update_proton.sh

#!/bin/bash

steam_dir="$HOME/.steam"
proton=""
list=0

options=$(getopt -o d:p:l --long directory:proton:list -- "$@")
eval set -- "$options"
while true; do
  case "$1" in
    -d|--directory)
      steam_dir="$2"
      shift 2;;
    -p|--proton)
      proton="$2"
      shift 2;;
    -l|--list)
      list=1
      shift;;
    --)
      shift
      break;;
    *)
      echo "Invalid option: $1"
      exit 1;;
  esac
done

# Grab all the library folders
dirs=$(cat $steam_dir/steam/steamapps/libraryfolders.vdf | grep -o '/.*' | sed 's/"//g' )

for dir in $dirs; do
  echo "Found library at $dir..."
  if [ -n "$proton" ]
  then
    sed -i "1s/.*/${proton}/g" $dir/steamapps/compatdata/*/config_info
  fi
  if [ "$list" -eq 1 ]
  then
    head -1 $dir/steamapps/compatdata/*/config_info | sed -e 's@steamapps/compatdata/@@g' -e 's@/config_info@@g'
  fi
done