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goblin

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An embedded LSM-Tree database for Elixir.

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goblin lib goblin export.ex
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lib/goblin/export.ex 

defmodule Goblin.Export do

  @moduledoc false



  @spec into_tar(Path.t(), list(Path.t())) :: {:ok, Path.t()} | {:error, term()}

  def into_tar(dir, filelist) do

    tar_name = tar_name(dir)

    tar_filelist = Enum.map(filelist, &tar_file/1)



    case create_tar(tar_name, tar_filelist) do

      :ok ->

        {:ok, tar_name}



      error ->

        File.rm(tar_name)

        error

    end

  end



  defp create_tar(name, filelist) do

    :erl_tar.create(name, filelist, [:compressed])

  end



  defp tar_name(dir) do

    now = DateTime.utc_now(:second) |> DateTime.to_iso8601(:basic)

    filename = "goblin_#{now}.tar.gz"

    Path.join(dir, filename)

  end



  defp tar_file(path) do

    {~c"#{Path.basename(path)}", ~c"#{path}"}

  end

end