mix.md

update dependancies

cd my_projct
mix deps.update

restart dependancies

mix deps.clean fs
mix deps.get

ecto

create db

mix ecto.create

custom mix

$ mkdir lib/mix/tasks
vim lib/mix/tasks/myapp.subscribe.ex

defmodule Mix.Tasks.Myapp.Subscribe do
  use Mix.Task

  @shortdoc "subscribe to SNS topic"

  @moduledoc """
  This is where we would put any long form documentation or doctests.
  """

  def run(endpoint) do

    # because this is a phoenix mix task you may need to start "all apps" before rest of code is executed
    Mix.Tasks.App.Start.run([]) # This will start all apps
    # ... if you just need  single app run this :
    #
    # Application.ensure_all_started(:myapp)

    Mix.shell.info "registering endpoint #{endpoint} to sns topic"
    ExAws.SNS.subscribe("arn:aws:sns:eu-west-1:800571264173:mytopic","http", "#{endpoint}/subscribe") |> ExAws.request
  end

  # We can define other functions as needed here.
  # end
end

$ mix myapp.subscribe http://my-endpoint.com