1 files changed, 138 insertions, 0 deletions
diff --git a/mcs/class/Microsoft.Build/Microsoft.Build.Internal/BuildTaskDatabase.cs b/mcs/class/Microsoft.Build/Microsoft.Build.Internal/BuildTaskDatabase.cs
new file mode 100644
index 0000000000..0b7660b2d4
--- /dev/null
+++ b/mcs/class/Microsoft.Build/Microsoft.Build.Internal/BuildTaskDatabase.cs
@@ -0,0 +1,138 @@
+//
+// BuildTaskFactory.cs
+//
+// Author:
+//   Atsushi Enomoto (atsushi@xamarin.com)
+//
+// Copyright (C) 2013 Xamarin Inc. (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.Build.Framework;
+using System.Reflection;
+using Microsoft.Build.Execution;
+using Microsoft.Build.Evaluation;
+using Microsoft.Build.Construction;
+using System.IO;
+using System.Xml;
+
+namespace Microsoft.Build.Internal
+{
+	class BuildTaskDatabase
+	{
+		const string default_tasks_file = "Microsoft.Common.tasks";
+		static readonly Dictionary<string,BuildTaskDatabase> default_factory = new Dictionary<string, BuildTaskDatabase> ();
+
+		public static BuildTaskDatabase GetDefaultTaskDatabase (Toolset toolset)
+		{
+			if (toolset == null)
+				throw new ArgumentNullException ("toolset");
+			BuildTaskDatabase defaults;
+			if (!default_factory.TryGetValue (toolset.ToolsVersion, out defaults)) {
+				defaults = new BuildTaskDatabase (toolset);
+			}
+			return defaults;
+		}
+		
+		// for 'default' tasks.
+		BuildTaskDatabase (Toolset toolset)
+		{
+			ProjectRootElement root;
+			using (var xml = XmlReader.Create (Path.Combine (toolset.ToolsPath, default_tasks_file)))
+				root = ProjectRootElement.Create (xml);
+			LoadUsingTasks (null, root);
+		}
+		
+		public BuildTaskDatabase (ProjectInstance projectInstance, ProjectRootElement projectRootElement)
+		{
+			LoadUsingTasks (projectInstance, projectRootElement);
+		}
+		
+		internal class TaskDescription
+		{
+			public TaskAssembly TaskAssembly { get; set; }
+			public string Name { get; set; }
+			public Type TaskFactoryType { get; set; }
+			public Type TaskType { get; set; }
+			public IDictionary<string, TaskPropertyInfo> TaskFactoryParameters { get; set; }
+			public string TaskBody { get; set; }
+			
+			public bool IsMatch (string name)
+			{
+				int ridx = Name.LastIndexOf ('.');
+				int tidx = name.IndexOf ('.');
+				return string.Equals (Name, name, StringComparison.OrdinalIgnoreCase) ||
+					tidx < 0 && ridx > 0 && string.Equals (Name.Substring (ridx + 1), name, StringComparison.OrdinalIgnoreCase);
+			}
+		}
+		
+		internal class TaskAssembly
+		{
+			public string AssemblyName { get; set; }
+			public string AssemblyFile { get; set; }
+			public Assembly LoadedAssembly { get; set; }
+		}
+		
+		readonly List<TaskAssembly> assemblies = new List<TaskAssembly> ();
+		readonly List<TaskDescription> task_descs = new List<TaskDescription> ();
+
+		public List<TaskDescription> Tasks {
+			get { return task_descs; }
+		}
+		
+		void LoadUsingTasks (ProjectInstance projectInstance, ProjectRootElement project)
+		{
+			Func<string,bool> cond = s => projectInstance != null ? projectInstance.EvaluateCondition (s) : Convert.ToBoolean (s);
+			foreach (var ut in project.UsingTasks) {
+				var ta = assemblies.FirstOrDefault (a => a.AssemblyFile.Equals (ut.AssemblyFile, StringComparison.OrdinalIgnoreCase) || a.AssemblyName.Equals (ut.AssemblyName, StringComparison.OrdinalIgnoreCase));
+				if (ta == null) {
+					ta = new TaskAssembly () { AssemblyName = ut.AssemblyName, AssemblyFile = ut.AssemblyFile };
+					ta.LoadedAssembly = ta.AssemblyName != null ? Assembly.Load (ta.AssemblyName) : Assembly.LoadFile (ta.AssemblyFile);
+					assemblies.Add (ta);
+				}
+				var pg = ut.ParameterGroup == null ? null : ut.ParameterGroup.Parameters.Select (p => new TaskPropertyInfo (p.Name, Type.GetType (p.ParameterType), cond (p.Output), cond (p.Required)))
+					.ToDictionary (p => p.Name);
+				var task = new TaskDescription () {
+					TaskAssembly = ta,
+					Name = ut.TaskName,
+					TaskFactoryType = string.IsNullOrEmpty (ut.TaskFactory) ? null : LoadTypeFrom (ta.LoadedAssembly, ut.TaskName, ut.TaskFactory),
+					TaskType = string.IsNullOrEmpty (ut.TaskFactory) ? LoadTypeFrom (ta.LoadedAssembly, ut.TaskName, ut.TaskName) : null,
+					TaskFactoryParameters = pg,
+					TaskBody = ut.TaskBody != null && cond (ut.TaskBody.Condition) ? ut.TaskBody.Evaluate : null,
+					};
+				task_descs.Add (task);
+			}
+		}
+		
+		Type LoadTypeFrom (Assembly a, string taskName, string possiblyShortTypeName)
+		{
+			Type type = a.GetType (possiblyShortTypeName, false, true);
+			if (possiblyShortTypeName.IndexOf ('.') < 0)
+				type = a.GetTypes ().FirstOrDefault (t => t.Name == possiblyShortTypeName);
+			if (type == null)
+				throw new InvalidOperationException (string.Format ("For task '{0}' Specified type '{1}' was not found in assembly '{2}'", taskName, possiblyShortTypeName, a.FullName));
+			return type;
+		}
+	}
+}
+