1 files changed, 103 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.BuildTasks/MergeProjectWithVSTemplate.cs b/src/DotNetOpenAuth.BuildTasks/MergeProjectWithVSTemplate.cs
new file mode 100644
index 0000000..1a8a17d
--- /dev/null
+++ b/src/DotNetOpenAuth.BuildTasks/MergeProjectWithVSTemplate.cs
@@ -0,0 +1,103 @@
+//-----------------------------------------------------------------------
+// <copyright file="MergeProjectWithVSTemplate.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.BuildTasks {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Text;
+	using Microsoft.Build.Framework;
+	using Microsoft.Build.Utilities;
+	using System.Xml.Linq;
+	using System.IO;
+	using Microsoft.Build.BuildEngine;
+	using System.Diagnostics.Contracts;
+
+	public class MergeProjectWithVSTemplate : Task {
+		internal const string VSTemplateNamespace = "http://schemas.microsoft.com/developer/vstemplate/2005";
+
+		[Required]
+		public string[] ProjectItemTypes { get; set; }
+
+		[Required]
+		public string[] ReplaceParametersExtensions { get; set; }
+
+		[Required]
+		public ITaskItem[] Templates { get; set; }
+
+		/// <summary>
+		/// Executes this instance.
+		/// </summary>
+		public override bool Execute() {
+			foreach(ITaskItem sourceTemplateTaskItem in this.Templates) {
+				var template = XElement.Load(sourceTemplateTaskItem.ItemSpec);
+				var templateContentElement = template.Element(XName.Get("TemplateContent", VSTemplateNamespace));
+				var projectElement = templateContentElement.Element(XName.Get("Project", VSTemplateNamespace));
+				if (projectElement == null) {
+					Log.LogMessage("Skipping merge of \"{0}\" with a project because no project was referenced from the template.", sourceTemplateTaskItem.ItemSpec);
+					continue;
+				}
+
+				var projectPath = Path.Combine(Path.GetDirectoryName(sourceTemplateTaskItem.ItemSpec), projectElement.Attribute("File").Value);
+				Log.LogMessage("Merging project \"{0}\" with \"{1}\".", projectPath, sourceTemplateTaskItem.ItemSpec);
+				var sourceProject = new Project();
+				sourceProject.Load(projectPath);
+
+				// Collect the project items from the project that are appropriate
+				// to include in the .vstemplate file.
+				var itemsByFolder = from item in sourceProject.EvaluatedItems.Cast<BuildItem>()
+							where this.ProjectItemTypes.Contains(item.Name)
+							orderby item.Include
+							group item by Path.GetDirectoryName(item.Include);
+				foreach (var folder in itemsByFolder) {
+					XElement parentNode = FindOrCreateParent(folder.Key, projectElement);
+
+					foreach (var item in folder) {
+						bool replaceParameters = this.ReplaceParametersExtensions.Contains(Path.GetExtension(item.Include));
+						var itemName = XName.Get("ProjectItem", VSTemplateNamespace);
+						var projectItem = parentNode.Elements(itemName).FirstOrDefault(el => string.Equals(el.Value, Path.GetFileName(item.Include), StringComparison.OrdinalIgnoreCase));
+						if (projectItem == null) {
+							projectItem = new XElement(itemName, Path.GetFileName(item.Include));
+							parentNode.Add(projectItem);
+						}
+						if (replaceParameters) {
+							projectItem.SetAttributeValue("ReplaceParameters", "true");
+						}
+					}
+				}
+
+				template.Save(sourceTemplateTaskItem.ItemSpec);
+			}
+
+			return !Log.HasLoggedErrors;
+		}
+
+		private static XElement FindOrCreateParent(string directoryName, XElement projectElement) {
+			Contract.Requires<ArgumentNullException>(projectElement != null);
+
+			if (string.IsNullOrEmpty(directoryName)) {
+				return projectElement;
+			}
+
+			string[] segments = directoryName.Split(Path.DirectorySeparatorChar);
+			XElement parent = projectElement;
+			for (int i = 0; i < segments.Length; i++) {
+				var candidateName = XName.Get("Folder", VSTemplateNamespace);
+				var candidate = parent.Elements(XName.Get("Folder", VSTemplateNamespace)).FirstOrDefault(n => n.Attribute("Name").Value == segments[i]);
+				if (candidate == null) {
+					candidate = new XElement(
+						candidateName,
+						new XAttribute("Name", segments[i]));
+					parent.Add(candidate);
+				}
+
+				parent = candidate;
+			}
+
+			return parent;
+		}
+	}
+}