{

public static void UpdateSubmodules(Repository repo)

{

foreach (var submodule in repo.Submodules)

{

var subDir = Path.Combine(repo.Info.WorkingDirectory, submodule.Path);

Directory.CreateDirectory(subDir); // Required to avoid NotFoundException

repo.Submodules.Update(submodule.Name, new SubmoduleUpdateOptions { Init = true });

}

}

public static void CommitFile(Repository repo, string path, string content, Signature author)

{

var contentFile = Path.Combine(repo.Info.WorkingDirectory, path);

File.WriteAllText(contentFile, content);

Commands.Stage(repo, path);

repo.Commit("message", author, author);

}

public static void AddSubmodule(Repository repo, string name, string path, Repository subRepo)

{

var modulesPath = ".gitmodules";

var modulesFile = Path.Combine(repo.Info.WorkingDirectory, modulesPath);

if (!File.Exists(modulesFile))

{

File.WriteAllText(modulesFile, "");

}

var modulesConfig = Configuration.BuildFrom(modulesFile);

modulesConfig.Set($"submodule.{name}.path", path, ConfigurationLevel.Local);

modulesConfig.Set($"submodule.{name}.url", subRepo.Info.WorkingDirectory, ConfigurationLevel.Local);

Commands.Stage(repo, modulesPath);

AddGitLinkToTheIndex(repo.Index, path, subRepo.Head.Tip.Sha);

}

public static void AddGitLinkToTheIndex(Index index, string path, string sha)

{

var id = new ObjectId(sha);

var mode = Mode.GitLink;

index.GetType().InvokeMember("AddEntryToTheIndex", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.InvokeMethod, null,

index, new object[] { path, id, mode }, CultureInfo.InvariantCulture);

}