1 files changed, 47 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.BuildTasks/ChangeAssemblyReference.cs b/src/DotNetOpenAuth.BuildTasks/ChangeAssemblyReference.cs
new file mode 100644
index 0000000..3ad5eb0
--- /dev/null
+++ b/src/DotNetOpenAuth.BuildTasks/ChangeAssemblyReference.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Linq;
+using System.IO;
+using System.Xml;
+
+using Microsoft.Build.Framework;
+using Microsoft.Build.Utilities;
+using Microsoft.Build.BuildEngine;
+
+namespace DotNetOpenAuth.BuildTasks {
+	/// <summary>
+	/// Replaces Reference items HintPaths in a set of projects.
+	/// </summary>
+	public class ChangeAssemblyReference : Task {
+		/// <summary>
+		/// The projects to alter.
+		/// </summary>
+		[Required]
+		public ITaskItem[] Projects { get; set; }
+		/// <summary>
+		/// The project reference to remove.
+		/// </summary>
+		[Required]
+		public string OldReference { get; set; }
+		/// <summary>
+		/// The assembly reference to add.
+		/// </summary>
+		[Required]
+		public string NewReference { get; set; }
+
+		const string msbuildNamespace = "http://schemas.microsoft.com/developer/msbuild/2003";
+		public override bool Execute() {
+			foreach (var project in Projects) {
+				Project doc = new Project();
+				doc.Load(project.ItemSpec);
+				
+				var reference = doc.GetEvaluatedItemsByName("Reference").OfType<BuildItem>().
+					Where(item => string.Equals(item.GetMetadata("HintPath"), OldReference, StringComparison.OrdinalIgnoreCase)).Single();
+				reference.SetMetadata("HintPath", NewReference);
+
+				doc.Save(project.ItemSpec);
+			}
+
+			return true;
+		}
+	}
+}