defmodule Mix.Tasks.ExDbmigrate.Gen.Relation do
use Mix.Task
@moduledoc """
After configuring your default ecto repo in `:ecto_repos`
Run mix ExDbmigrate to generates a migration.
"""
def run(_args) do
{:ok, _} = Application.ensure_all_started(:ex_dbmigrate)
Mix.shell().info("ExDbmigrate v#{Application.spec(:ex_dbmigrate, :vsn)}")
ExDbmigrate.migration_relations()
|> Enum.join(", ")
end
def generate(args) do
source = Path.join(Application.app_dir(:ex_dbmigrate, "/priv/"), "migration_relations.exs")
name = Keyword.fetch(args, :name)
target = Path.join(File.cwd!(), "/priv/repo/migrations/#{timestamp()}_#{name}.exs")
if !File.dir?(target) do
File.mkdir_p("priv/repo/migrations/")
end
Mix.Generator.create_file(target, EEx.eval_file(source, args))
end
defp timestamp do
{{y, m, d}, {hh, mm, ss}} = :calendar.universal_time()
"#{y}#{pad(m)}#{pad(d)}#{pad(hh)}#{pad(mm)}#{pad(ss)}"
end
defp pad(i) when i < 10, do: <<?0, ?0 + i>>
defp pad(i), do: to_string(i)
end