From a85356dcff85b08f66de8e5e8987d92ae022a89f Mon Sep 17 00:00:00 2001
From: Alexander Bock <alexander.bock@liu.se>
Date: Wed, 21 Sep 2016 22:10:59 +0200
Subject: [PATCH] Add a commandline argument to override the cache directory

---
 src/engine/openspaceengine.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/engine/openspaceengine.cpp b/src/engine/openspaceengine.cpp
index 29d5f9934c..35e5e41805 100644
--- a/src/engine/openspaceengine.cpp
+++ b/src/engine/openspaceengine.cpp
@@ -112,6 +112,7 @@ namespace {
         std::string configurationName;
         std::string sgctConfigurationName;
         std::string sceneName;
+        std::string cacheFolder;
     } commandlineArgumentPlaceholders;
 }
 
@@ -283,6 +284,14 @@ bool OpenSpaceEngine::create(int argc, char** argv,
         return false;
     }
 
+    if (!commandlineArgumentPlaceholders.cacheFolder.empty()) {
+        FileSys.registerPathToken(
+            "${CACHE}",
+            commandlineArgumentPlaceholders.cacheFolder,
+            ghoul::filesystem::FileSystem::Override::Yes
+        );
+    }
+
     // Initialize the requested logs from the configuration file
     _engine->configureLogging();
 
@@ -599,6 +608,14 @@ bool OpenSpaceEngine::gatherCommandlineArguments() {
         "the scene file, overriding the value set in the OpenSpace configuration file"
     ));
 
+    commandlineArgumentPlaceholders.cacheFolder = "";
+    _commandlineParser->addCommand(std::make_unique<SingleCommand<std::string>>(
+        &commandlineArgumentPlaceholders.cacheFolder, "-cacheDir", "", "Provides the "
+        "path to a cache file, overriding the value set in the OpenSpace configuration "
+        "file"
+    ));
+    
+
     return true;
 }