From 410408cb71a6ca10c9e6ad7cdb919a5e404b5b11 Mon Sep 17 00:00:00 2001
From: Nicholas Hastings <nshastings@gmail.com>
Date: Wed, 22 Oct 2014 07:58:13 -0400
Subject: [PATCH] Add support for shared depots (depotfromapp).

---
 DepotDownloader/ContentDownloader.cs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/DepotDownloader/ContentDownloader.cs b/DepotDownloader/ContentDownloader.cs
index 640f0e9f..581a39d6 100644
--- a/DepotDownloader/ContentDownloader.cs
+++ b/DepotDownloader/ContentDownloader.cs
@@ -208,6 +208,21 @@ namespace DepotDownloader
             if (depotChild == KeyValue.Invalid)
                 return INVALID_MANIFEST_ID;
 
+            if (depotChild["depotfromapp"] != KeyValue.Invalid)
+            {
+                uint otherAppId = (uint)depotChild["depotfromapp"].AsInteger();
+                if (otherAppId == appId)
+                {
+                    // This shouldn't ever happen, but ya never know with Valve. Don't infinite loop.
+                    Console.WriteLine("App {0}, Depot {1} has depotfromapp of {2}!",
+                        appId, depotId, otherAppId);
+                    return INVALID_MANIFEST_ID;
+                }
+
+                steam3.RequestAppInfo(otherAppId);
+                return GetSteam3DepotManifest(depotId, otherAppId, branch);
+            }
+
             var manifests = depotChild["manifests"];
             var manifests_encrypted = depotChild["encryptedmanifests"];