archived-teslamate/lib/teslamate/release.ex

defmodule TeslaMate.Release do
  @app :teslamate

  import Ecto.Query
  alias TeslaMate.Repo

  def migrate do
    for repo <- repos() do
      {:ok, _, _} = Ecto.Migrator.with_repo(repo, &Ecto.Migrator.run(&1, :up, all: true))
    end
  end

  def rollback(repo, version) do
    for r <- repos(), r == repo do
      {:ok, _, _} = Ecto.Migrator.with_repo(repo, &Ecto.Migrator.run(&1, :down, to: version))
    end
  end

  def seconds_since_last_migration do
    Repo.one(
      from m in "schema_migrations",
        select: fragment("EXTRACT(EPOCH FROM age(NOW(), ?::timestamp))::BIGINT", m.inserted_at),
        order_by: [desc: m.inserted_at],
        limit: 1
    )
  end

  defp repos do
    Application.ensure_all_started(:ssl)
    Application.load(@app)
    Application.fetch_env!(@app, :ecto_repos)
  end
end