feat: agonostic dll

src/CLI/Functions/Unpacker.cs

@@ -1,4 +1,4 @@
-using CUE4Parse.Compression;
+using CLI.Utils;
 using CUE4Parse.FileProvider.Objects;
 using CUE4Parse.UE4.Pak;
 
@@ -7,7 +7,11 @@ namespace CLI.Functions
   class Unpacker
   {
     public static string ZlibPath = "../../temp/zlib.dll";
-    public static string VFSWriteDirectory = "../../temp/vfs/";
+    public static string VFSWriteDir = "../../temp/vfs/";
+
+    // this may be different from the one provided in args so check this and not args[1]
+    // we don't wanna delete my local installation of the game when debugging haha!
+    public static string tempDepotsDir = "../../temp/depot/";
 
     public static void Unpack(string[] args)
     {
@@ -16,17 +20,7 @@ namespace CLI.Functions
         throw new ArgumentException("Missing required initial paks directory");
       }
 
-      if (File.Exists(ZlibPath))
+      AgnosticZlibHelper.Initialize();
-      {
-        Console.WriteLine($"Zlib found at {ZlibPath}; using that...");
-      }
-      else
-      {
-        Console.WriteLine($"Zlib not found; downloading to {ZlibPath}...");
-        ZlibHelper.DownloadDll(ZlibPath);
-      }
-
-      ZlibHelper.Initialize(ZlibPath);
 
       string workingDirectory = args[1];
       string paksDirectory = Path.Combine(workingDirectory, "Blitz/Content/Paks");
@@ -36,6 +30,12 @@ namespace CLI.Functions
       {
         Exergy(container);
       }
+
+      if (Directory.Exists(tempDepotsDir))
+      {
+        Console.WriteLine("Deleting temp depots directory...");
+        Directory.Delete(tempDepotsDir, true);
+      }
     }
 
     public static void Exergy(string container)
@@ -56,7 +56,7 @@ namespace CLI.Functions
           continue;
         }
 
-        string writePath = Path.Combine(VFSWriteDirectory, gameFile.Path);
+        string writePath = Path.Combine(VFSWriteDir, gameFile.Path);
 
         if (File.Exists(writePath))
         {

src/CLI/Utils/AgnosticZlibHelper.cs

@@ -0,0 +1,48 @@
+using System.Runtime.InteropServices;
+using CUE4Parse.Compression;
+
+namespace CLI.Utils
+{
+  public static class AgnosticZlibHelper
+  {
+    public const string ZlibRootPath = "../../temp/";
+    public const string ZlibBinariesPrefix =
+      "https://github.com/NotOfficer/Zlib-ng.NET/releases/download/1.0.0";
+
+    public static void Initialize()
+    {
+      string binariesUrl;
+      string fileExtension;
+
+      if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+      {
+        binariesUrl = $"{ZlibBinariesPrefix}/zlib-ng2.dll";
+        fileExtension = "dll";
+      }
+      else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+      {
+        binariesUrl = $"{ZlibBinariesPrefix}/libz-ng.so";
+        fileExtension = "so";
+      }
+      else
+      {
+        throw new PlatformNotSupportedException();
+      }
+
+      string fileName = $"zlib.{fileExtension}";
+      string filePath = Path.Combine(ZlibRootPath, fileName);
+
+      if (File.Exists(filePath))
+      {
+        Console.WriteLine($"Zlib found at {filePath}; using that...");
+      }
+      else
+      {
+        Console.WriteLine($"Zlib not found; downloading to {filePath} from {binariesUrl}...");
+        ZlibHelper.DownloadDll(filePath, binariesUrl);
+      }
+
+      ZlibHelper.Initialize(filePath);
+    }
+  }
+}