The shim between elixir and rust that gets overloaded

You can see more examples in the tests but here is a quick example:

  clone_prefix = "/tmp/example_git"
  # init bare repo
  {:ok, _} = ExGit.init_bare(clone_prefix <> "init_bare")

  # clone to another directory
  assert {:ok, "clone success"} ==
           ExGit.clone(clone_prefix <> "init_bare", clone_prefix <> "push_a")

  # clone another copy
  assert {:ok, "clone success"} ==
           ExGit.clone(clone_prefix <> "init_bare", clone_prefix <> "push_b")

  # commit to a
  :ok = File.write(clone_prefix <> "push_a/test.txt", "123")
  ExGit.add_commit(clone_prefix <> "push_a", "push 123")

  # push back changes so b can see it
  assert {:ok, "Pushed Successfully"} == ExGit.push_remote(clone_prefix <> "push_a", "master")

  # pull to check the file from b
  assert {:ok, "Updated"} ==
           ExGit.fast_forward(clone_prefix <> "push_b", "master")

  assert {:ok, "Up to date already"} ==
           ExGit.fast_forward(clone_prefix <> "push_b", "master")