JayBazuzi

# Create a file `~\header.cs` with the copyright or whatever you want
# in each file. Then run this script.
#
# Notes:
#
# Second step will force BOM at the start, and newline at the end, of each 
# file. It will also push all file encodings to be the same. Those make 
# diffs a little ugly.
#
# So, I do it in two steps: one to normalize encoding, and one to actually

JayBazuzi

	public class MyTask : Task
	{
	    [Required]
	    public string Foo { get; set; }
	
	    public override bool Execute()
	    {
	        Log.LogMessage(MessageImportance.Low, "Inputs:");
	        Log.LogMessage(MessageImportance.Low, "  Foo = {0}", this.Foo);
	        return true;

JayBazuzi

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
  <UsingTask TaskName="MyTask" AssemblyFile=".\bin\Debug\ClassLibrary2.dll" />
 
  <Target Name="Build">
    <MyTask Foo = "hi" />
  </Target>
 
</Project>

JayBazuzi

PS> msbuild .\My.proj /v:d
...
Task "MyTask"
  Inputs:
    Foo = hi
Done executing task "MyTask".

PS> msbuild .\My.proj /v:diag
...
Task "MyTask" (TaskId:2)

JayBazuzi

        [TestMethod]
        public void TestMethod1()
        {
            var process = new Process
            {
                StartInfo =
                {
                    FileName = @"C:\Program Files (x86)\MSBuild\12.0\bin\MSBuild.exe",
                    Arguments = @"..\..\my.proj /v:m /nologo",
                    UseShellExecute = false,

JayBazuzi

    class HighImportanceStringLogger : ILogger
    {
        readonly private StringBuilder stringBuilder = new StringBuilder();

        public void Initialize(IEventSource eventSource)
        {
            eventSource.MessageRaised += eventSource_MessageRaised;
        }

        void eventSource_MessageRaised(object sender, BuildMessageEventArgs e)

JayBazuzi

            var myProject = new ProjectInstance(@"..\..\my.proj");
            var logger = new HighImportanceStringLogger();
            var success = myProject.Build(new[] { logger });
            Assert.IsTrue(success);

            const string expected = @"Inputs:
  Foo = hi
";
            Assert.AreEqual(expected, logger.ToString());

JayBazuzi

            var projectRootElement = ProjectRootElement.Create();

            projectRootElement.AddUsingTask(typeof (MyTask));

            projectRootElement
                .AddTarget("Build")
                    .AddTask(typeof(MyTask).Name)
                        .SetParameter("Foo", "hi");

            var highImportanceStringLogger = new HighImportanceStringLogger();

JayBazuzi

using System;
using Microsoft.Build.Construction;

public static class ProjectRootElementExtensions
{
    public static void AddUsingTask(this ProjectRootElement projectRootElement, Type type)
    {
        projectRootElement
            .AddUsingTask(type.Name, type.Assembly.Location, null);
    }

JayBazuzi

using System.Linq;
using Microsoft.Build.Construction;

static class ProjectTargetElementExtensions
{
    public static ProjectTaskElement AddTask<TTask>(this ProjectTargetElement projectTargetElement)
    {
        string taskName = typeof (TTask).Name;
        ProjectRootElement projectRootElement = projectTargetElement.ContainingProject;