/// <summary>
        /// Get the REPO and REF property from portfile.cmake and return it as a RepoRef
        /// </summary>
        public async Task <RepoRef> GetRepoAndRef(string portName)
        {
            RepoRef repoRef = new RepoRef();

            try
            {
                string portFileUrl = GetPortFileCMake(portName);

                HtmlWeb htmlWeb = new HtmlWeb();
                htmlWeb.UsingCache = false;
                HtmlDocument htmlDocument = new HtmlDocument();
                htmlDocument = await htmlWeb.LoadFromWebAsync(portFileUrl);

                List <HtmlNode> htmlNodeList = htmlDocument.DocumentNode.SelectNodes("//td")
                                               .Where(node => node.GetAttributeValue("class", "")
                                                      .Equals("blob-code blob-code-inner js-file-line")).ToList();

                foreach (HtmlNode node in htmlNodeList)
                {
                    // Find REPO and REF lines
                    if (node.InnerText.Contains(" REPO "))
                    {
                        repoRef.Repo = node.InnerText.Replace(" ", "").Substring(4);
                    }
                    else if (node.InnerText.Contains(" REF "))
                    {
                        repoRef.Ref = node.InnerText.Replace(" ", "").Substring(3);
                    }

                    if (repoRef.Repo != null && repoRef.Ref != null)
                    {
                        break;
                    }
                }
            }
            catch (Exception)
            {
                return(null);
            }


            return(repoRef);
        }
        static async Task AsyncMain()
        {
            // Initialize
            Vcpkg vcpkg = new Vcpkg();

            vcpkg.SetHttpClient();

            // Fetching ports
            VcpkgMessage.NormalMessage("\n\n> Fetching ports... (It may take a few seconds)\n");
            IEnumerable <string> ports = await vcpkg.GetPorts();

            if (ports != null)
            {
                VcpkgMessage.NormalMessage("> Ports successfully fetched\n");

                // Some settings for console output
                int currentLine = Console.CursorTop + 1;
                int clearLength = 0;
                int percent     = 0;
                int portsCount  = ports.ToList().Count;

                // Looking for need-to-be-updated ports
                foreach (string port in ports)
                {
                    if (Program.canceling)
                    {
                        break;
                    }

                    percent++;
                    Console.SetCursorPosition(0, currentLine - 1);
                    VcpkgMessage.NormalMessage($"> Looking for need-to-be-updated ports... ({100 * percent / portsCount}%)");

                    // Reset the line
                    Console.SetCursorPosition(0, currentLine);
                    VcpkgMessage.ClearLine(currentLine, clearLength);

                    // Show the current port
                    Console.SetCursorPosition(0, currentLine);
                    VcpkgMessage.NormalMessage($"> Current port: \"{port}\"");
                    clearLength = 18 + port.Length;

                    // Get the port REPO and REF
                    RepoRef portRepoRef = await vcpkg.GetRepoAndRef(port);

                    if (vcpkg.HasRepoAndRef(portRepoRef))
                    {
                        string latestRelease = await vcpkg.SearchLatestRelease(portRepoRef.Repo);

                        // Show need-to-be-update port
                        if (vcpkg.PortNeedToUpdate(portRepoRef.Ref, latestRelease))
                        {
                            Console.SetCursorPosition(0, currentLine - 1);
                            ++currentLine;

                            string updatePort = $"\"{port}\" need to update from \"{portRepoRef.Ref}\" to \"{latestRelease}\" version.";

                            VcpkgMessage.WarningMessage(updatePort);
                            VcpkgMessage.NormalMessage("");

                            // Add port to the log list
                            vcpkg.AddToLog(updatePort);
                        }
                    }
                }

                // Remove last port check in the currentLine
                Console.SetCursorPosition(0, currentLine);
                VcpkgMessage.ClearLine(currentLine, clearLength);
                Console.SetCursorPosition(0, currentLine);

                // Finish
                if (!Program.canceling)
                {
                    VcpkgMessage.NormalMessage("\n> All ports checked!\n\n");
                }
                else
                {
                    VcpkgMessage.NormalMessage("\n> Task cancelled by user\n\n");
                }
            }
        }
 /// <summary>
 /// Check a port has both REPO and REF property
 /// </summary>
 public bool HasRepoAndRef(RepoRef port)
 {
     return((port.Repo != null && port.Ref != null) ? true : false);
 }