simple c# build tool as alternative to xbuild

builder.cs

// a simple alternative to xbuild
// parse sln and csproj files, and call mcs to compile the projects.
// can only build libraries at the moment
// Copyright: Timotheus Pokorra <timotheus.pokorra@solidcharity.com>
// License: MIT
// to build: mcs builder.cs -r:System.Xml.Linq
using System;
using System.IO;
using System.Diagnostics;
using System.Xml.Linq;

namespace MyBuild
{

	public class MyBuild
	{
		private static bool BuildProject(string csprojFile)
		{
			XDocument xmldoc = XDocument.Load(csprojFile);
			XNamespace msbuild = "http://schemas.microsoft.com/developer/msbuild/2003";

			string mcs_params = "/noconfig /debug:full /debug:portable /optimize-";
			mcs_params += " /target:library";

			var propertyGroups = xmldoc.Element(msbuild + "Project").Elements(msbuild + "PropertyGroup");

			string AssemblyName = "";

			foreach (XElement propertyGroup in propertyGroups)
			{
				if (propertyGroup.Element(msbuild + "AssemblyName") != null)
				{
					AssemblyName = propertyGroup.Element(msbuild + "AssemblyName").Value;
					break;
				}
			}

			mcs_params += " /out:" + rootPath + "/bin/" + AssemblyName + ".dll";

			foreach (var source in xmldoc.Descendants(msbuild + "Compile"))
			{
				string includePath = source.Attribute("Include").Value;
				mcs_params += " " + includePath.Replace("\\", "/");
			}
				
			foreach (var reference in xmldoc.Descendants(msbuild + "Reference"))
			{
				string includePath = reference.Attribute("Include").Value;
				XElement node = reference.Element(msbuild + "HintPath");
				if (node != null)
				{
					mcs_params += " -r:" + node.Value.Replace("\\", "/");
				}
				else
				{
					mcs_params += " -r:" + includePath;
				}
			}

			mcs_params += " /warn:4";

			Console.WriteLine("change to dir " + (Path.GetDirectoryName(csprojFile)) + " to build " + csprojFile);
			Directory.SetCurrentDirectory(Path.GetDirectoryName(csprojFile));
			Console.WriteLine(mcs_params);
			bool result = RunCompiler(mcs_params);
			Directory.SetCurrentDirectory(rootPath);
			return result;
		}

		private static bool BuildSolution(string solution)
		{
			using (StreamReader reader = new StreamReader(solution))
			{
				string line;
				while ((line = reader.ReadLine()) != null)
				{
					if (!line.Trim().StartsWith("#"))
					{
						if (line.Contains(".csproj"))
						{
							int index=line.IndexOf(".csproj");
							int startIndex=line.Substring(0, index).LastIndexOf('"')+1;
							int EndIndex=line.Substring(startIndex + 1).IndexOf('"');
							string projectFile = line.Substring(startIndex, EndIndex+1).Replace("\\", "/");
							if (!BuildProject(projectFile))
							{
								return false;
							}
						}
					}
				}
			}
			return true;
		}

		private static bool RunCompiler(string mcs_params)
		{
			try
			{
				using (Process myProcess = new Process())
				{
					myProcess.StartInfo.UseShellExecute = false;
					myProcess.StartInfo.FileName = "mcs";
					myProcess.StartInfo.Arguments = mcs_params;
					myProcess.StartInfo.CreateNoWindow = true;
					myProcess.Start();
					myProcess.WaitForExit();
					return (myProcess.ExitCode == 0);
				}
			}
			catch (Exception e)
			{
				Console.WriteLine(e.Message);
				return false;
			}
		}

		private static string rootPath;
		public static void Main(string[] args)
		{
			rootPath = Directory.GetCurrentDirectory();
			Directory.CreateDirectory(rootPath + "/bin");

			if (args.Length > 0)
			{
				if (args[0].EndsWith(".sln"))
				{
					BuildSolution(args[0]);
				}
				else if (args[0].EndsWith(".csproj"))
				{
					BuildProject(args[0]);
				}
			}

		}

	}
}