1 files changed, 77 insertions, 0 deletions

diff --git a/src/WixToolset.Core.WindowsInstaller/Bind/UpdateFromTextFilesCommand.cs b/src/WixToolset.Core.WindowsInstaller/Bind/UpdateFromTextFilesCommand.cs
new file mode 100644
index 00000000..4d09ff6b
--- /dev/null
+++ b/src/WixToolset.Core.WindowsInstaller/Bind/UpdateFromTextFilesCommand.cs
@@ -0,0 +1,77 @@
+// 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.WindowsInstaller.Bind
+{
+    using System;
+    using System.IO;
+    using System.Linq;
+    using WixToolset.Data;
+    using WixToolset.Data.Tuples;
+    using WixToolset.Extensibility.Services;
+
+    internal class UpdateFromTextFilesCommand
+    {
+        public UpdateFromTextFilesCommand(IMessaging messaging, IntermediateSection section)
+        {
+            this.Messaging = messaging;
+            this.Section = section;
+        }
+
+        private IMessaging Messaging { get; }
+
+        private IntermediateSection Section { get; }
+
+        public void Execute()
+        {
+            foreach (var bbControl in this.Section.Tuples.OfType<BBControlTuple>().Where(t => t.SourceFile != null))
+            {
+                bbControl.Text = this.ReadTextFile(bbControl.SourceLineNumbers, bbControl.SourceFile.Path);
+            }
+
+            foreach (var control in this.Section.Tuples.OfType<ControlTuple>().Where(t => t.SourceFile != null))
+            {
+                control.Text = this.ReadTextFile(control.SourceLineNumbers, control.SourceFile.Path);
+            }
+
+            foreach (var customAction in this.Section.Tuples.OfType<CustomActionTuple>().Where(c => c.ScriptFile != null))
+            {
+                customAction.Target = this.ReadTextFile(customAction.SourceLineNumbers, customAction.ScriptFile.Path);
+            }
+        }
+
+        /// <summary>
+        /// Reads a text file and returns the contents.
+        /// </summary>
+        /// <param name="sourceLineNumbers">Source line numbers for row from source.</param>
+        /// <param name="source">Source path to file to read.</param>
+        /// <returns>Text string read from file.</returns>
+        private string ReadTextFile(SourceLineNumber sourceLineNumbers, string source)
+        {
+            try
+            {
+                using (var reader = new StreamReader(source))
+                {
+                    return reader.ReadToEnd();
+                }
+            }
+            catch (DirectoryNotFoundException e)
+            {
+                this.Messaging.Write(ErrorMessages.BinderFileManagerMissingFile(sourceLineNumbers, e.Message));
+            }
+            catch (FileNotFoundException e)
+            {
+                this.Messaging.Write(ErrorMessages.BinderFileManagerMissingFile(sourceLineNumbers, e.Message));
+            }
+            catch (IOException e)
+            {
+                this.Messaging.Write(ErrorMessages.BinderFileManagerMissingFile(sourceLineNumbers, e.Message));
+            }
+            catch (NotSupportedException)
+            {
+                this.Messaging.Write(ErrorMessages.FileNotFound(sourceLineNumbers, source));
+            }
+
+            return null;
+        }
+    }
+}