51 lines
1.2 KiB
Elixir
51 lines
1.2 KiB
Elixir
defmodule Mix.Tasks.Isn.Gen.Migration do
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use Mix.Task
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import Mix.Ecto
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import Mix.Generator
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@migration_name "CreateISNExtension"
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@shortdoc "Generate an Ecto migration to add the `isn` extension"
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@moduledoc """
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Generate an Ecto migration to add the `isn` extension to your database.
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## Example
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mix isn.gen.migration
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"""
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@doc false
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def run(args) do
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Mix.Task.run "app.start", args
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[repo] = parse_repo(args)
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filename = "#{timestamp}_create_isn_extension.exs"
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path = Path.relative_to(migrations_path(repo), Mix.Project.app_path)
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file = Path.join(path, filename)
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create_directory(path)
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mod = Module.concat([repo, Migrations, @migration_name])
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create_file(file, migration_template(mod: mod))
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end
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defp timestamp do
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{{y, m, d}, {hh, mm, ss}} = :calendar.universal_time()
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"#{y}#{pad(m)}#{pad(d)}#{pad(hh)}#{pad(mm)}#{pad(ss)}"
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end
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defp pad(s), do: s |> to_string() |> String.rjust(2, ?0)
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embed_template :migration, """
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defmodule <%= inspect @mod %> do
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use Ecto.Migration
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def up do
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execute "CREATE EXTENSION IF NOT EXISTS isn;"
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end
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def down do
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execute "DROP EXTENSION IF EXISTS isn;"
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end
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end
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"""
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end
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