Build.UpdateVersion can track the git revision now, in addition to svn and bzr.

Source/Build.UpdateVersion/Program.cs

@@ -88,9 +88,12 @@ namespace Build.UpdateVersion
             double timespan = now.Subtract(new DateTime(2010, 1, 1)).TotalDays;
             string build = ((int)timespan).ToString();
 
-            string revision = RetrieveSvnRevision() ?? RetrieveBzrRevision() ?? RetrieveSeconds(timespan);
+            string revision = RetrieveGitRevision() ?? RetrieveSvnRevision() ?? RetrieveBzrRevision() ?? RetrieveSeconds(timespan);
             revision = revision.Trim();
             
+            Console.WriteLine("Build timestamp was: " + build);
+            Console.WriteLine("Revision detected was: " + revision);
+
             File.WriteAllLines(file, new string[]
             {
                 "// This file is auto-generated through Source/Build.Tasks/GenerateAssemblyInfo.cs.",
@@ -117,6 +120,26 @@ namespace Build.UpdateVersion
             return revision;
         }
 
+        static string RetrieveGitRevision()
+        {
+            try
+            {
+                string output = RunProcess("git", "log -1", RootDirectory);
+                
+                const string RevisionText = "commit ";
+                int index = output.IndexOf(RevisionText);
+                int endIndex = output.IndexOf("\n"); // since it's the first line...
+                if (index > -1)
+                    return output.Substring(index + RevisionText.Length, endIndex - index - RevisionText.Length).Trim();
+            }
+            catch (Exception e)
+            {
+                Debug.Print("Failed to retrieve git revision. Error: {0}", e);
+            }
+            return null;
+        }
+
+
         static string RetrieveSvnRevision()
         {
             try

Source/Examples/Main.cs

@@ -42,6 +42,11 @@ namespace Examples
         {
             try
             {   
+                // This seems to be useful enough to leave in for a while.
+                TextWriterTraceListener console = new TextWriterTraceListener(System.Console.Out);
+                Trace.Listeners.Add (console);
+                Debug.Listeners.Add (console);
+
                 Application.EnableVisualStyles();
                 Application.SetCompatibleTextRenderingDefault(false);