1 files changed, 61 insertions, 0 deletions

diff --git a/src/WixToolset.Core.Native/FileSystem.cs b/src/WixToolset.Core.Native/FileSystem.cs
new file mode 100644
index 00000000..b9691d44
--- /dev/null
+++ b/src/WixToolset.Core.Native/FileSystem.cs
@@ -0,0 +1,61 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core.Native
+{
+    using System;
+    using System.IO;
+    using System.Runtime.InteropServices;
+
+    /// <summary>
+    /// File system helpers.
+    /// </summary>
+    public static class FileSystem
+    {
+        /// <summary>
+        /// Copies a file.
+        /// </summary>
+        /// <param name="source">The file to copy.</param>
+        /// <param name="destination">The destination file.</param>
+        /// <param name="allowHardlink">Allow hardlinks.</param>
+        public static void CopyFile(string source, string destination, bool allowHardlink)
+        {
+            if (File.Exists(destination))
+            {
+                File.Delete(destination);
+            }
+
+            if (!allowHardlink || !CreateHardLink(destination, source, IntPtr.Zero))
+            {
+#if DEBUG
+                var er = Marshal.GetLastWin32Error();
+#endif
+
+                File.Copy(source, destination, overwrite: true);
+            }
+        }
+
+        /// <summary>
+        /// Moves a file.
+        /// </summary>
+        /// <param name="source">The file to move.</param>
+        /// <param name="destination">The destination file.</param>
+        public static void MoveFile(string source, string destination)
+        {
+            if (File.Exists(destination))
+            {
+                File.Delete(destination);
+            }
+
+            var directory = Path.GetDirectoryName(destination);
+            if (!String.IsNullOrEmpty(directory))
+            {
+                Directory.CreateDirectory(directory);
+            }
+
+            File.Move(source, destination);
+        }
+
+        [DllImport("Kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
+        private static extern bool CreateHardLink(string lpFileName, string lpExistingFileName, IntPtr lpSecurityAttributes);
+    }
+}