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SQL-based adapters for Ecto and database migrations
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lib/mix/tasks/ecto.migrations.ex
defmodule Mix.Tasks.Ecto.Migrations do
use Mix.Task
import Mix.Ecto
import Mix.EctoSQL
@shortdoc "Displays the repository migration status"
@moduledoc """
Displays the up / down migration status for the given repository.
The repository must be set under `:ecto_repos` in the
current app configuration or given via the `-r` option.
By default, migrations are expected at "priv/YOUR_REPO/migrations"
directory of the current application but it can be configured
by specifying the `:priv` key under the repository configuration.
If the repository has not been started yet, one will be
started outside our application supervision tree and shutdown
afterwards.
## Examples
mix ecto.migrations
mix ecto.migrations -r Custom.Repo
## Command line options
* `-r`, `--repo` - the repo to obtain the status for
* `--no-compile` - does not compile applications before running
* `--no-deps-check` - does not check depedendencies before running
"""
@impl true
def run(args, migrations \\ &Ecto.Migrator.migrations/2, puts \\ &IO.puts/1) do
repos = parse_repo(args)
result =
Enum.map(repos, fn repo ->
ensure_repo(repo, args)
path = ensure_migrations_path(repo)
{:ok, pid, _} = ensure_started(repo, all: true)
repo_status = migrations.(repo, path)
pid && repo.stop()
"""
Repo: #{inspect(repo)}
Status Migration ID Migration Name
--------------------------------------------------
""" <>
Enum.map_join(repo_status, "\n", fn {status, number, description} ->
" #{format(status, 10)}#{format(number, 16)}#{description}"
end) <> "\n"
end)
puts.(Enum.join(result, "\n"))
end
defp format(content, pad) do
content
|> to_string
|> String.pad_trailing(pad)
end
end