Add Nix flake

.gitignore

@@ -0,0 +1 @@
+result

README.md

@@ -13,6 +13,18 @@ for example, if you cloned the repo to your $HOME directory,
 
 if %steam_location% is not set, the script will default to /home/$USER/.local/share
 
+## Usage
+
+```
+Usage: ./run.sh [OPTIONS]...
+Small script containing Multiplayer fix for AOE2 Definitive Edition.
+
+Options:
+    -h, --help                    print this text and exit
+    -l, --steam-location <PATH>   path to your Steam installation
+    -f, --force                   forcefully repatch AOE2DE
+```
+
 ## Dependencies
 - cabextract
 - wget

flake.nix

@@ -0,0 +1,20 @@
+{
+  description = "Multiplayer fix for AoE 2: DE";
+
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-23.11;
+
+  outputs = { self, nixpkgs, ... }:
+  {
+    defaultPackage.x86_64-linux =
+      with import nixpkgs { system = "x86_64-linux"; };
+      stdenv.mkDerivation {
+        name = "proton_aoe2de_mpfix";
+        src = self;
+        installPhase = ''
+          patch -p1 < nixos.patch
+          mkdir -p $out/bin
+          mv run.sh $out/bin/run.sh
+        '';
+      };
+  };
+}

nixos.patch

@@ -0,0 +1,13 @@
+diff --git a/run.sh b/run.sh
+index 7fb44cb..b0f6009 100755
+--- a/run.sh
++++ b/run.sh
+@@ -1,4 +1,7 @@
+-#!/bin/bash
++#!/usr/bin/env nix-shell
++#! nix-shell -i bash
++#! nix-shell -p bash jq cabextract wget
++
+ set -e # Fail fast
+
+ # Check if jq is installed, then fetch the App ID if it is

run.sh

@@ -1,55 +1,92 @@
 #!/bin/bash
 set -e # Fail fast
 
-# Check if jq is installed, then fetch the App ID if it is
-if command -v jq &> /dev/null
-then
-    APPID=$(wget -qO- https://api.steampowered.com/ISteamApps/GetAppList/v2/ | jq '.applist.apps[] | select(.name=="Age of Empires II: Definitive Edition")' | jq ".appid")
-else
-    APPID=813780 # The most recent App ID when this was written
-fi
-
+# Arguments
+USAGE=0
 STEAM_LOCATION="/home/$USER/.steam/steam"
+FORCE=0
+VCREDIST_LOCATION=""
 
-# check if arguments are not empty
-if [ ! $# -eq 0 ]; then
-    # set STEAM_LOCATION to the provided argument
-    STEAM_LOCATION=$1
-fi
+usage() {
+    cat <<- _end_of_usage
+	Usage: $0 [OPTIONS]...
+	Small script containing Multiplayer fix for AOE2 Definitive Edition.
 
-libraries=$(grep 'path' $STEAM_LOCATION/steamapps/libraryfolders.vdf | sed -re 's/^(\s)+"path"(\s)+"(.*)"$/\3/g')
+	Options:
+	    -h, --help                    print this text and exit
+	    -l, --steam-location <PATH>   path to your Steam installation
+	    -f, --force                   forcefully repatch AOE2DE
+	_end_of_usage
 
-echo "Found steam library locations:"
-for library in $libraries; do
-  echo " * $library"
-done
+    exit 0
+}
 
-for library in $libraries; do
-  SYSTEM32_LOCATION="$library/steamapps/compatdata/$APPID/pfx/drive_c/windows/system32"
+get_args() {
+    while [ $# -ne 0 ]
+    do
+        case "$1" in
+        "-h"|"--help")            USAGE=1;;
+        "-l"|"--steam-location")  STEAM_LOCATION=$2; shift;;
+        "-f"|"--force")           FORCE=1; shift;;
+        *)  echo "Unkown argument $1! See --help." 1>&2;;
+        esac
+        shift
+    done
+}
 
-  if [ -d "$SYSTEM32_LOCATION" ]; then
-    echo "Found app in: $SYSTEM32_LOCATION"
-    break
-  fi
-done;
+patch() {
+    # Check if jq is installed, then fetch the App ID if it is
+    if command -v jq &> /dev/null
+    then
+        APPID=$(wget -qO- https://api.steampowered.com/ISteamApps/GetAppList/v2/ | jq '.applist.apps[] | select(.name=="Age of Empires II: Definitive Edition")' | jq ".appid")
+    else
+        APPID=813780 # The most recent App ID when this was written
+    fi
 
-# Check if the dll already exists and is not a symlink
-if [ -f "$SYSTEM32_LOCATION/ucrtbase.dll" ] && [ ! -L "$SYSTEM32_LOCATION/ucrtbase.dll" ]; then
-    echo "ucrtbase.dll is already installed"
-    exit 0
-fi
-
-rm -f $SYSTEM32_LOCATION/ucrtbase.dll # There might be a simlink to the "default" ucrtbase.dll, it needs to be deleted
-
-TEMP_FOLDER=$(mktemp --directory)
-cd $TEMP_FOLDER
-echo "Fetching vc_redist.x64.exe"
-wget https://download.microsoft.com/download/0/6/4/064F84EA-D1DB-4EAA-9A5C-CC2F0FF6A638/vc_redist.x64.exe
-cabextract vc_redist.x64.exe --filter a10
-cabextract a10 --filter ucrtbase.dll
-cp ucrtbase.dll $SYSTEM32_LOCATION
-echo "Copied ucrtbase.dll"
-rm -f vc_redist.x64.exe a10 ucrtbase.dll
-rmdir $TEMP_FOLDER
-
-exit 0
+    libraries=$(grep 'path' $STEAM_LOCATION/steamapps/libraryfolders.vdf | sed -re 's/^(\s)+"path"(\s)+"(.*)"$/\3/g')
+
+    echo "Found steam library locations:"
+    for library in $libraries; do
+        echo " * $library"
+    done
+
+    for library in $libraries; do
+        SYSTEM32_LOCATION="$library/steamapps/compatdata/$APPID/pfx/drive_c/windows/system32"
+
+        if [ -d "$SYSTEM32_LOCATION" ]; then
+            echo "Found app in: $SYSTEM32_LOCATION"
+            VCREDIST_LOCATION="$library/steamapps/common/AoE2DE/vc_redist.x64.exe"
+            break
+        fi
+    done;
+
+    # Check if the dll already exists and is not a symlink
+    if [ -f "$SYSTEM32_LOCATION/ucrtbase.dll" ] && [ ! -L "$SYSTEM32_LOCATION/ucrtbase.dll" ]; then
+        echo "ucrtbase.dll is already installed"
+        [ $FORCE -eq 0 ] && exit 0
+        echo "Forcing patch anyway..."
+    fi
+
+    rm -f $SYSTEM32_LOCATION/ucrtbase.dll # There might be a simlink to the "default" ucrtbase.dll, it needs to be deleted
+
+    TEMP_FOLDER=$(mktemp --directory)
+    cd $TEMP_FOLDER
+
+    # Download vc_redist only if we don't already have it
+    if [ -n "$VCREDIST_LOCATION" ] && [ -f "$VCREDIST_LOCATION" ]; then
+        cp "$VCREDIST_LOCATION" .
+    else
+        echo "Fetching vc_redist.x64.exe"
+        wget https://download.microsoft.com/download/0/6/4/064F84EA-D1DB-4EAA-9A5C-CC2F0FF6A638/vc_redist.x64.exe
+    fi
+    cabextract vc_redist.x64.exe --filter a10
+    cabextract a10 --filter ucrtbase.dll
+    cp ucrtbase.dll $SYSTEM32_LOCATION
+    echo "Copied ucrtbase.dll"
+    rm -f vc_redist.x64.exe a10 ucrtbase.dll
+    rmdir $TEMP_FOLDER
+}
+
+get_args "$@"
+[ $USAGE -eq 1 ] && usage
+patch