c#用LibGit2Sharp实现git archive

 using (var repo = new Repository(path))
            {
                    //git archive
                    Commit cm = repo.Lookup<Commit>(hashCode);
                    String tarpath = outputDir + "\\" + projectName;
                    String untarpath = outputDir + "\\" + projectName + "\\" + hashCode;
                    string tarfile = outputDir + "\\" + projectName + "\\" + hashCode+ ".zip";
                    String tarname = hashCode + ".zip";
                    if (!Directory.Exists(untarpath))
                    {
                        //创建
                        Directory.CreateDirectory(untarpath);
                    }
                    repo.ObjectDatabase.Archive(cm, tarfile);
                    UnRAR(untarpath, tarpath, tarname);
            }
             /// <summary>
        /// 利用 WinRAR 进行解压缩
        /// </summary>
        /// <param name="path">文件解压路径（绝对）</param>
        /// <param name="rarPath">将要解压缩的 .rar 文件的存放目录（绝对路径）</param>
        /// <param name="rarName">将要解压缩的 .rar 文件名（包括后缀）</param>
        public void UnRAR(string path, string rarPath, string rarName)
        {
            ProcessStartInfo startinfo = new ProcessStartInfo(); ;
            Process process = new Process();
            String rarexe = @"F:\WinRAR\WinRAR.exe"; //WinRAR安装位置
            //解压缩命令，相当于在要压缩文件(rarName)上点右键->WinRAR->解压到当前文件夹
            String cmd = string.Format("x {0} {1} -y",rarName,path);
            startinfo.FileName = rarexe;
            startinfo.Arguments = cmd;
            startinfo.WindowStyle = ProcessWindowStyle.Hidden;
            startinfo.WorkingDirectory = rarPath;
            process.StartInfo = startinfo;
            process.Start();
            process.WaitForExit();
            process.Dispose();
            process.Close();         
        }