From b63228c6759d09951c5303979bf3c7e97840a7c9 Mon Sep 17 00:00:00 2001
From: Nathan Phillips <nathan.phillips@diffblue.com>
Date: Fri, 17 Mar 2017 10:59:21 +0000
Subject: [PATCH 1/2] delete_directory fails silently on subfolders

---
 src/util/file_util.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/util/file_util.cpp b/src/util/file_util.cpp
index 5999d15ebfb..7cfea942a0c 100644
--- a/src/util/file_util.cpp
+++ b/src/util/file_util.cpp
@@ -107,7 +107,13 @@ void delete_directory(const std::string &path)
     struct dirent *ent;
 
     while((ent=readdir(dir))!=NULL)
-      remove((path+"/"+ent->d_name).c_str());
+    {
+      std::string sub_path=path+"/"+ent->d_name;
+      if(ent->d_type==DT_DIR)
+        delete_directory(sub_path);
+      else
+        remove(sub_path.c_str());
+    }
 
     closedir(dir);
   }

From d110db0cb13de183c5860d5cad46d367d3272e15 Mon Sep 17 00:00:00 2001
From: Nathan Phillips <nathan.phillips@diffblue.com>
Date: Tue, 21 Mar 2017 12:29:33 +0000
Subject: [PATCH 2/2] Version to work on Windows

---
 src/util/file_util.cpp | 50 ++++++++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 21 deletions(-)

diff --git a/src/util/file_util.cpp b/src/util/file_util.cpp
index 7cfea942a0c..0a62549316e 100644
--- a/src/util/file_util.cpp
+++ b/src/util/file_util.cpp
@@ -26,6 +26,7 @@ Date: January 2012
 #include <io.h>
 #include <windows.h>
 #include <direct.h>
+#include <util/unicode.h>
 #define chdir _chdir
 #define popen _popen
 #define pclose _pclose
@@ -79,33 +80,43 @@ Function: delete_directory
 
 \*******************************************************************/
 
-void delete_directory(const std::string &path)
-{
-  #ifdef _WIN32
-
-  std::string pattern=path+"\\*";
+#ifdef _WIN32
 
+void delete_directory_utf16(const std::wstring &path)
+{
+  std::wstring pattern=path + L"\\*";
   // NOLINTNEXTLINE(readability/identifiers)
-  struct _finddata_t info;
-
-  intptr_t handle=_findfirst(pattern.c_str(), &info);
-
-  if(handle!=-1)
+  struct _wfinddata_t info;
+  intptr_t hFile=_wfindfirst(pattern.c_str(), &info);
+  if(hFile!=-1)
   {
-    unlink(info.name);
-
-    while(_findnext(handle, &info)!=-1)
-      unlink(info.name);
+    do
+    {
+      if(wcscmp(info.name, L".")==0 || wcscmp(info.name, L"..")==0)
+        continue;
+      std::wstring sub_path=path+L"\\"+info.name;
+      if(info.attrib & _A_SUBDIR)
+        delete_directory_utf16(sub_path);
+      else
+        DeleteFileW(sub_path.c_str());
+    }
+    while(_wfindnext(hFile, &info)==0);
+    _findclose(hFile);
+    RemoveDirectoryW(path.c_str());
   }
+}
 
-  #else
+#endif
 
+void delete_directory(const std::string &path)
+{
+#ifdef _WIN32
+  delete_directory_utf16(utf8_to_utf16_little_endian(path));
+#else
   DIR *dir=opendir(path.c_str());
-
   if(dir!=NULL)
   {
     struct dirent *ent;
-
     while((ent=readdir(dir))!=NULL)
     {
       std::string sub_path=path+"/"+ent->d_name;
@@ -114,13 +125,10 @@ void delete_directory(const std::string &path)
       else
         remove(sub_path.c_str());
     }
-
     closedir(dir);
   }
-
-  #endif
-
   rmdir(path.c_str());
+#endif
 }
 
 /*******************************************************************\