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snakebridge

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Compile-time generator for type-safe Elixir bindings to Python libraries

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snakebridge lib snakebridge python_runtime_runner.ex
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lib/snakebridge/python_runtime_runner.ex 

defmodule SnakeBridge.PythonRuntimeRunner do

  @moduledoc false



  @behaviour Snakepit.Bootstrap.Runner



  @impl true

  def mix(_task, _args), do: :ok



  @impl true

  def cmd(command, args, opts) do

    opts = Keyword.put_new(opts, :stderr_to_stdout, true)



    {actual_command, actual_args} =

      if String.ends_with?(command, ".sh") do

        {"bash", [command | args]}

      else

        {command, args}

      end



    case System.cmd(actual_command, actual_args, opts) do

      {output, 0} ->

        write_output(output)

        :ok



      {output, status} ->

        write_output(output)

        {:error, {:command_failed, command, status}}

    end

  rescue

    error in ErlangError ->

      {:error, {:command_failed, command, Exception.message(error)}}

  end



  defp write_output(output) do

    if String.trim(output) != "" do

      IO.write(output)

    end

  end

end