Pilz.Updating/Pilz.Updating.Client/Utils.cs

namespace Pilz.Updating.Client;

public static class Utils
{
    public static void CopyFiles(DirectoryInfo sourceDir, DirectoryInfo destinationDir)
    {
        if (!destinationDir.Exists)
            destinationDir.Create();

        foreach (FileInfo sFile in sourceDir.EnumerateFiles("*", SearchOption.TopDirectoryOnly))
        {
            var dFile = new FileInfo(Path.Combine(destinationDir.FullName, sFile.Name));
            var triesLeft = 1;

            while (triesLeft > 0)
            {
                triesLeft--;

                try
                {
                    sFile.CopyTo(dFile.FullName, true);
                }
                catch (IOException)
                {
                    if (triesLeft == 0 && File.Exists(dFile.FullName))
                    {
                        var oldFile = dFile.FullName + ".old";
                        File.Delete(oldFile);
                        File.Move(dFile.FullName, oldFile, true);
                        File.Delete(oldFile);
                        triesLeft++;
                    }
                }
                catch (Exception)
                {
                }
            }
        }

        foreach (DirectoryInfo sDir in sourceDir.EnumerateDirectories("*", SearchOption.TopDirectoryOnly))
        {
            var dDir = destinationDir.CreateSubdirectory(sDir.Name);
            CopyFiles(sDir, dDir);
        }
    }
}