AOE4 Desync Fix

fix-aoe4.sh

#!/usr/bin/env bash

set -e

STEAM_DIR=$HOME/.steam/steam/steamapps

if [ ! -e "$STEAM_DIR" ]; then
  # Possibly flatpak
  STEAM_DIR=/var/home/$USER/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps
fi

if [ ! -e "$STEAM_DIR" ]; then
  echo "Could not find steam" >&2
  exit 1
fi

AOE4_DIR=$STEAM_DIR/compatdata/1466860
AOE4_WIN_DIR=$AOE4_DIR/pfx/drive_c/windows
AOE4_WIN_SYS32_DIR=$AOE4_WIN_DIR/system32
AOE4_WIN_SYS64_DIR=$AOE4_WIN_DIR/syswow64

if [ ! -e "$AOE4_DIR" ]; then
  echo "Could not find AOE4 compat dir, you need to run it at least once" >&2
  exit 1
fi

function cleanup() {
  local arch=$1

  rm -f "vc_redist.$arch.exe"
  rm -rf 0 a{0..11} u{0..31}
}

function backup-file() {
  filename="$1"
  timestamp="$2"

  if [ -f "ucrtbase.dll" ]; then
    [ -e "$1" ] && mv "$1" "$1".bak-$timestamp
    echo "$1 -> $2"
  fi
}

function backup() {
  local timestamp=$(date +%s)

  backup-file concrt140.dll $timestamp
  backup-file msvcp140.dll $timestamp
  backup-file vcamp140.dll $timestamp
  backup-file vccorlib140.dll $timestamp
  backup-file vcomp140.dll $timestamp
  backup-file vcruntime140.dll $timestamp
  backup-file ucrtbase.dll $timestamp
}

function download_and_replace() {
  local arch=$1

  wget "https://download.microsoft.com/download/9/3/F/93FCF1E7-E6A4-478B-96E7-D4B285925B00/vc_redist.$arch.exe"
  cabextract "vc_redist.$arch.exe"
  cabextract a10
}

function replace_dlls() {
  local dir=$1
  local arch=$2

  cd "$dir"

  echo "replacing dlls in directory $dir"
  backup
  cleanup "$arch"
  download_and_replace "$arch"
  cleanup "$arch"
}

replace_dlls $AOE4_WIN_SYS32_DIR x64
replace_dlls $AOE4_WIN_SYS64_DIR x86