Fixed Steam3 content always downloading depots for all platforms.

DepotDownloader/ContentDownloader.cs

@@ -326,13 +326,30 @@ namespace DepotDownloader
 
             if (depots != null)
             {
-                foreach (var child in depots.Children)
+                foreach (var depotSection in depots.Children)
                 {
                     int id = -1;
-                    if (int.TryParse(child.Name, out id) && child.Children.Count > 0 && (depotId == -1 || id == depotId))
+                    if (depotSection.Children.Count == 0)
+                        continue;
+                    
+                    if (!int.TryParse(depotSection.Name, out id))
+                        continue;
+                    
+                    if (depotId > -1 && id != depotId)
+                        continue;
+
+                    if (!Config.DownloadAllPlatforms)
                     {
-                        depotIDs.Add(id);
+                        var depotConfig = depotSection["config"];
+                        if (depotConfig != KeyValue.Invalid && depotConfig["oslist"] != KeyValue.Invalid)
+                        {
+                            var oslist = depotSection["oslist"].Value.Split(',');
+                            if (Array.IndexOf(oslist, Util.GetSteamOS()) == -1)
+                                continue;
+                        }
                     }
+
+                    depotIDs.Add(id);
                 }
             }
 

DepotDownloader/Util.cs

@@ -18,7 +18,7 @@ namespace DepotDownloader
 
         // Environment.OSVersion.Platform returns PlatformID.Unix under Mono on OS X
         // Code adapted from Mono: mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs
-        public static bool IsMacOSX()
+        private static bool IsMacOSX()
         {
             if ( _isMacOSX != -1 )
                 return _isMacOSX == 1;
@@ -54,6 +54,22 @@ namespace DepotDownloader
             return false;
         }
 
+        public static string GetSteamOS()
+        {
+            switch (Environment.OSVersion.Platform)
+            {
+                case PlatformID.Win32NT:
+                case PlatformID.Win32Windows:
+                    return "windows";
+                case PlatformID.MacOSX:
+                    return "macos";
+                case PlatformID.Unix:
+                    return IsMacOSX() ? "macos" : "linux";
+            }
+
+            return "unknown";
+        }
+
         public static string ReadPassword()
         {
             ConsoleKeyInfo keyInfo;