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Easy deployment for Elixir apps

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deli lib deli controller bin.ex
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lib/deli/controller/bin.ex 

defmodule Deli.Controller.Bin do

  import Deli.Shell

  alias Deli.Config



  @moduledoc "Provides support for bin on deploy"



  @behaviour Deli.Controller



  @impl true

  def start_host(app, host) do

    bin_cmd(app, host, :start)

  end



  @impl true

  def stop_host(app, host) do

    bin_cmd(app, host, :stop)

  end



  @impl true

  def restart_host(app, host) do

    bin_cmd(app, host, :restart)

  end



  @impl true

  def service_running?(app, host) do

    status = app |> service_status(host)

    status =~ ~r/pong/

  end



  @impl true

  def service_status(app, host) do

    [command | args] = app |> bin(host, :ping)

    {:ok, content} = command |> cmd_result(args, [0, 1, 127])

    content

  end



  defp bin_cmd(app, host, op) do

    [command | args] = app |> bin(host, op)

    cmd(command, args)

  end



  defp bin(app, host, cmd) do

    [:ssh, "#{app}@#{host}", Config.bin_path(), cmd]

  end

end