Initial commit

WixFileVersionPreprocessorExtension.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+
+using Microsoft.Tools.WindowsInstallerXml;
+
+namespace WixFileVersionExtension
+{
+    public class WixFileVersionPreprocessorExtension : PreprocessorExtension
+    {        
+        private static readonly string[] prefixes = { "fileVersion" };
+
+        public override string[] Prefixes
+        {
+            get { return prefixes; }
+        }
+
+        public override string EvaluateFunction(string prefix, string function, string[] args)
+        {
+            switch (prefix)
+            {
+                case "fileVersion":
+                    // Make sure there actually is a file name
+                    if (args.Length == 0 || args[0].Length == 0)
+                        throw new ArgumentException("File name not specified");
+
+                    // Make sure the file exists
+                    if (!File.Exists(args[0]))
+                        throw new ArgumentException(string.Format("File name {0} does not exist", args[0]));
+
+                    // Get the file version information for the given file
+                    FileVersionInfo fileVersionInfo = FileVersionInfo.GetVersionInfo(args[0]);
+
+                    // Get the property that matches the name of the function
+                    PropertyInfo propertyInfo = fileVersionInfo.GetType().GetProperty(function);
+
+                    // Make sure the property exists
+                    if (propertyInfo == null)
+                        throw new ArgumentException(string.Format("Unable to find property {0} in FileVersionInfo", function));
+
+                    // Return the value of the property as a string
+                    return propertyInfo.GetValue(fileVersionInfo, null).ToString();
+            }
+
+            return null;
+        }
+    }
+}