Link Steam's Proton prefixes by name for ease of use

compatdata.sh

#!/usr/bin/env bash

help() {
  echo NAME
  echo "  compatdata.sh - create \"by-game\" symlink folder for every compatdata folder on this machine"
  echo
  echo SYNOPSIS
  echo "  compatdata.sh [-h] [-p]"
  echo
  echo OPTIONS
  echo "  -p Use protontricks to find all steam and non-steam prefixes"
  echo "  -h Print this help"

  exit 0
}

while getopts ":hp" o; do
  case "${o}" in
  h)
    help
    ;;
  p)
    export USE_PROTONTRICKS=1
    ;;
  *)
    help
    ;;
  esac
done
shift $((OPTIND - 1))

mapfile -t compatdata_array < <(find / -type d -path "*/steamapps/compatdata" 2>/dev/null)
declare -A protontricks_names

function get_protontricks_names() {
  while read -r game; do
    local ID="$(echo $game | cut -d ' ' -f 1)"
    local NAME="$(echo $game | cut -d ' ' -f 2-)"
    protontricks_names+=(["$ID"]="$NAME")
  done < <(protontricks -l | awk '/\([0-9]+\)/ { match($0, /\(([0-9]+)\)/, arr); appid = arr[1]; gsub(/ *\([^)]+\) */, "", $0); print appid " " $0 }')
}

[ "$USE_PROTONTRICKS" = "1" ] && get_protontricks_names

function get_name() {
  if [ "$USE_PROTONTRICKS" = "1" ]; then
    echo ${protontricks_names["$1"]}
  else
    curl -s "https://store.steampowered.com/api/appdetails?appids=$1" | jq -r '.[].data.name'
  fi
}

for dir in "${compatdata_array[@]}"; do
  echo "Found: $dir"

  [ -d "$dir/by-game" ] || mkdir "$dir/by-game" || exit 1

  mapfile -t pfx_array < <(find $dir -type d -maxdepth 1 -mindepth 1 2>/dev/null)

  for pfx in "${pfx_array[@]}"; do
    APPID=$(basename $pfx)

    [ "$APPID" = "0" ] && continue
    [ "$APPID" = "by-game" ] && continue

    APPNAME=$(get_name $APPID)

    [ "$APPNAME" = "null" ] && continue
    [ "$APPNAME" = "" ] && continue

    echo $APPID → $APPNAME

    [ ! -d "$dir/by-game/$APPNAME" ] && ln -s "$pfx" "$dir/by-game/$APPNAME"

  done

done

If you have more than 200 **installed** games! But yeah, I hear you. I might start using protontricks to query a VDF file instead, because someone already asked me to support non-steam games that protontricks can do somehow!