1 files changed, 59 insertions, 0 deletions
diff --git a/Duplicati/Library/Common/IO/DotNetRuntime.System.IO.Path.Windows.cs b/Duplicati/Library/Common/IO/DotNetRuntime.System.IO.Path.Windows.cs
new file mode 100755
index 000000000..6a830a955
--- /dev/null
+++ b/Duplicati/Library/Common/IO/DotNetRuntime.System.IO.Path.Windows.cs
@@ -0,0 +1,59 @@
+// Adapted from https://raw.githubusercontent.com/dotnet/runtime/v5.0.12/src/libraries/System.Private.CoreLib/src/System/IO/Path.cs
+
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// The MIT License (MIT)
+//   
+// Copyright(c).NET Foundation and Contributors
+// 
+// All rights reserved.
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+using System;
+
+namespace Duplicati.Library.Common.IO
+{
+    public static class DotNetRuntimePathWindows
+    {
+        /// <summary>
+        /// Returns true if the path is fixed to a specific drive or UNC path. This method does no
+        /// validation of the path (URIs will be returned as relative as a result).
+        /// Returns false if the path specified is relative to the current drive or working directory.
+        /// </summary>
+        /// <remarks>
+        /// Handles paths that use the alternate directory separator.  It is a frequent mistake to
+        /// assume that rooted paths <see cref="Path.IsPathRooted(string)"/> are not relative.  This isn't the case.
+        /// "C:a" is drive relative- meaning that it will be resolved against the current directory
+        /// for C: (rooted, but relative). "C:\a" is rooted and not relative (the current directory
+        /// will not be used to modify the path).
+        /// </remarks>
+        /// <exception cref="ArgumentNullException">
+        /// Thrown if <paramref name="path"/> is null.
+        /// </exception>
+        public static bool IsPathFullyQualified(string path)
+        {
+            if (path == null)
+                throw new ArgumentNullException(nameof(path));
+
+            return !PathInternalWindows.IsPartiallyQualified(path);
+        }
+    }
+}