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Robust user authentication solution

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pow lib mix tasks ecto pow.ecto.gen.migration.ex
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lib/mix/tasks/ecto/pow.ecto.gen.migration.ex 

defmodule Mix.Tasks.Pow.Ecto.Gen.Migration do

  @shortdoc "Generates user migration file"



  @moduledoc """

  Generates a user migration file.



      mix pow.ecto.gen.migration -r MyApp.Repo



      mix pow.ecto.gen.migration -r MyApp.Repo Accounts.Organization organizations



  This generator will add a migration file in `priv/repo/migrations` for the

  `users` table



  ## Arguments



    * `-r`, `--repo` - the repo module

    * `--binary-id` - use binary id for primary key

  """

  use Mix.Task



  alias Pow.Ecto.Schema.Migration, as: SchemaMigration

  alias Mix.{Ecto, Pow, Pow.Ecto.Migration}



  @switches [binary_id: :boolean]

  @default_opts [binary_id: false]

  @mix_task "pow.ecto.gen.migration"



  @impl true

  def run(args) do

    Pow.no_umbrella!(@mix_task)

    Pow.ensure_ecto!(@mix_task, args)



    args

    |> Pow.parse_options(@switches, @default_opts)

    |> parse()

    |> create_migration_files(args)

  end



  defp parse({config, parsed, _invalid}) do

    parsed

    |> Pow.validate_schema_args!(@mix_task)

    |> Map.merge(config)

  end



  defp create_migration_files(config, args) do

    args

    |> Ecto.parse_repo()

    |> Enum.map(&Ecto.ensure_repo(&1, args))

    |> Enum.map(&Map.put(config, :repo, &1))

    |> Enum.each(&create_migration_files/1)

  end



  defp create_migration_files(%{repo: repo, binary_id: binary_id, schema_plural: schema_plural}) do

    context_base = Pow.app_base(Pow.otp_app())

    schema       = SchemaMigration.new(context_base, schema_plural, repo: repo, binary_id: binary_id)

    content      = SchemaMigration.gen(schema)



    Migration.create_migration_file(repo, schema.migration_name, content)

  end

end