Introduce IResolveExtension and IFileSystemExtension with cleanup

1 files changed, 38 insertions, 0 deletions

diff --git a/src/WixToolset.Extensibility/BaseResolverExtension.cs b/src/WixToolset.Extensibility/BaseResolverExtension.cs
new file mode 100644
index 00000000..9498d126
--- /dev/null
+++ b/src/WixToolset.Extensibility/BaseResolverExtension.cs
@@ -0,0 +1,38 @@
+// 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.Extensibility
+{
+    using WixToolset.Data;
+    using WixToolset.Data.Bind;
+
+    /// <summary>
+    /// Base class for creating a resolver extension.
+    /// </summary>
+    public abstract class BaseResolverExtension : IResolverExtension
+    {
+        /// <summary>
+        /// Context for use by the extension.
+        /// </summary>
+        protected IResolveContext Context { get; private set; }
+
+        /// <summary>
+        /// Called at the beginning of the resolving variables and files.
+        /// </summary>
+        public virtual void PreResolve(IResolveContext context)
+        {
+            this.Context = context;
+        }
+
+        public virtual string ResolveFile(string source, IntermediateTupleDefinition tupleDefinition, SourceLineNumber sourceLineNumbers, BindStage bindStage)
+        {
+            return null;
+        }
+
+        /// <summary>
+        /// Called at the end of resolve.
+        /// </summary>
+        public virtual void PostResolve(ResolveResult result)
+        {
+        }
+    }
+}