Is there a way to get the git root directory in one command?

Question

Mercurial has a way of printing the root directory (that contains .hg) via

hg root

Is there something equivalent in git to get the director

Answer 1

Had to solve this myself today. Solved it in C# as I needed it for a program, but I guess it can be esily rewritten. Consider this Public Domain.

public static string GetGitRoot (string file_path) {

    file_path = System.IO.Path.GetDirectoryName (file_path);

    while (file_path != null) {

        if (Directory.Exists (System.IO.Path.Combine (file_path, ".git")))
            return file_path;

        file_path = Directory.GetParent (file_path).FullName;

    }

    return null;

}