Sample projects are now downgraded from VS2010 to VS2008 while creating a drop.

1 files changed, 103 insertions, 0 deletions

diff --git a/src/DotNetOpenAuth.BuildTasks/DowngradeProjects.cs b/src/DotNetOpenAuth.BuildTasks/DowngradeProjects.cs
new file mode 100644
index 0000000..7c7ca79
--- /dev/null
+++ b/src/DotNetOpenAuth.BuildTasks/DowngradeProjects.cs
@@ -0,0 +1,103 @@
+//-----------------------------------------------------------------------
+// <copyright file="DowngradeProjects.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.BuildTasks {
+	using System;
+	using System.Collections.Generic;
+	using System.IO;
+	using System.Linq;
+	using System.Text;
+	using Microsoft.Build.BuildEngine;
+	using Microsoft.Build.Framework;
+	using Microsoft.Build.Utilities;
+
+	/// <summary>
+	/// Downgrades Visual Studio 2010 solutions and projects so that they load in Visual Studio 2008.
+	/// </summary>
+	public class DowngradeProjects : Task {
+		/// <summary>
+		/// Gets or sets the projects and solutions to downgrade.
+		/// </summary>
+		[Required]
+		public ITaskItem[] Projects { get; set; }
+
+		/// <summary>
+		/// Executes this instance.
+		/// </summary>
+		public override bool Execute() {
+			foreach (ITaskItem taskItem in this.Projects) {
+				switch (GetClassification(taskItem)) {
+					case ProjectClassification.VS2010Project:
+						this.Log.LogMessage(MessageImportance.Low, "Downgrading project \"{0}\".", taskItem.ItemSpec);
+						Project project = new Project();
+						project.Load(taskItem.ItemSpec);
+						project.DefaultToolsVersion = "3.5";
+
+						string projectTypeGuids = project.GetEvaluatedProperty("ProjectTypeGuids");
+						if (!string.IsNullOrEmpty(projectTypeGuids)) {
+							projectTypeGuids = projectTypeGuids.Replace("{F85E285D-A4E0-4152-9332-AB1D724D3325}", "{603c0e0b-db56-11dc-be95-000d561079b0}");
+							project.SetProperty("ProjectTypeGuids", projectTypeGuids);
+						}
+
+						// Web projects usually have an import that includes these substrings
+						foreach (Import import in project.Imports) {
+							import.ProjectPath = import.ProjectPath
+								.Replace("$(MSBuildExtensionsPath32)", "$(MSBuildExtensionsPath)")
+								.Replace("VisualStudio\\v10.0", "VisualStudio\\v9.0");
+						}
+
+						// VS2010 won't let you have a System.Core reference, but VS2008 requires it.
+						BuildItemGroup references = project.GetEvaluatedItemsByName("Reference");
+						if (!references.Cast<BuildItem>().Any(item => item.FinalItemSpec.StartsWith("System.Core", StringComparison.OrdinalIgnoreCase))) {
+							project.AddNewItem("Reference", "System.Core");
+						}
+
+						project.Save(taskItem.ItemSpec);
+						break;
+					case ProjectClassification.VS2010Solution:
+						this.Log.LogMessage(MessageImportance.Low, "Downgrading solution \"{0}\".", taskItem.ItemSpec);
+						string[] contents = File.ReadAllLines(taskItem.ItemSpec);
+						if (contents[1] != "Microsoft Visual Studio Solution File, Format Version 11.00" ||
+							contents[2] != "# Visual Studio 2010") {
+							this.Log.LogError("Unrecognized solution file header in \"{0}\".", taskItem.ItemSpec);
+							break;
+						}
+
+						contents[1] = "Microsoft Visual Studio Solution File, Format Version 10.00";
+						contents[2] = "# Visual Studio 2008";
+
+						for (int i = 3; i < contents.Length; i++) {
+							contents[i] = contents[i].Replace("TargetFrameworkMoniker = \".NETFramework,Version%3Dv", "TargetFramework = \"");
+						}
+
+						File.WriteAllLines(taskItem.ItemSpec, contents);
+						break;
+					default:
+						this.Log.LogWarning("Unrecognized project type for \"{0}\".", taskItem.ItemSpec);
+						break;
+				}
+			}
+
+			return !this.Log.HasLoggedErrors;
+		}
+
+		private static ProjectClassification GetClassification(ITaskItem taskItem) {
+			if (Path.GetExtension(taskItem.ItemSpec).EndsWith("proj", StringComparison.OrdinalIgnoreCase)) {
+				return ProjectClassification.VS2010Project;
+			} else if (Path.GetExtension(taskItem.ItemSpec).Equals(".sln", StringComparison.OrdinalIgnoreCase)) {
+				return ProjectClassification.VS2010Solution;
+			} else {
+				return ProjectClassification.Unrecognized;
+			}
+		}
+
+		private enum ProjectClassification {
+			VS2010Project,
+			VS2010Solution,
+			Unrecognized,
+		}
+	}
+}