TC config updater for building project branches

gistfile1.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;

namespace Move.Platform.TeamCityBranchUpdaterTool
{
    public static class Program
    {
        public static void Main(string[] args)
        {
            var lsRemote = File.ReadAllLines("ls-remote.txt");
            const string projectConfigXml = "project-config.xml";
            var projectConfig = File.ReadAllText(projectConfigXml);

            var rxRef = new Regex("refs/heads/(.*)$");
            var branches = new HashSet<string>(from line in lsRemote select rxRef.Match(line) into match where match.Success select match.Groups[1].Value);

            var rxBuild = new Regex(@"<build-type\s+id=""([^""]+)"".*?</build-type>", RegexOptions.Singleline);

            projectConfig = rxBuild.Replace(projectConfig,m =>{var name = m.Groups[1].Value;if (branches.Contains(name)){branches.Remove(name);return m.Value;}return string.Empty;});
            var newBranches = string.Join(Environment.NewLine,branches.Select(b =>"<build-type id=\"" + b + "\" name=\"" + b +"\"><settings ref=\"template\"></settings></build-type>"));
            projectConfig = projectConfig.Replace("</project>", newBranches + "</project>");

            File.WriteAllText(projectConfigXml, projectConfig);
        }
    }
}