From ba7cd04ff7ac7546ef71ebd999e97dd4ef36028f Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Thu, 22 Jan 2015 23:28:31 +0100
Subject: [PATCH] ESSImport: prevent accidental overwriting of file

---
 apps/essimporter/main.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/apps/essimporter/main.cpp b/apps/essimporter/main.cpp
index 5a9e0c77d..d467e053e 100644
--- a/apps/essimporter/main.cpp
+++ b/apps/essimporter/main.cpp
@@ -50,7 +50,15 @@ int main(int argc, char** argv)
         if (vm.count("compare"))
             importer.compare();
         else
+        {
+            const std::string& ext = ".omwsave";
+            if (boost::filesystem::exists(boost::filesystem::path(outputFile))
+                    && (outputFile.size() < ext.size() || outputFile.substr(outputFile.size()-ext.size()) != ext))
+            {
+                throw std::runtime_error("Output file already exists and does not end in .omwsave. Did you mean to use --compare?");
+            }
             importer.run();
+        }
     }
     catch (std::exception& e)
     {