@spec gen_migration(
  Igniter.t(),
  repo :: module(),
  name :: String.t(),
  opts :: Keyword.t()
) ::
  Igniter.t()

Generates a new migration file for the given repo.

Options

• :body - the body of the migration
• :timestamp - the timestamp to use for the migration. Primarily useful for testing so you know what the filename will be.
• :on_exists - what to do if the migration module already exists. Options are:
  • :increment - Calls this function again, but with an increasing number at the end, until it finds a free name. (default)
  • :skip - do nothing
  • :overwrite - overwrites the file
  • {:error, error} - adds an issue to the igniter that prevents writing and displays to the user
  • {:warning, warning} - adds a warning to the igniter that allows writing but displays to the user

@spec list_repos(Igniter.t()) :: {Igniter.t(), [module()]}

Lists all the ecto repos in the project

@spec select_repo(Igniter.t(), Keyword.t()) :: {Igniter.t(), nil | module()}

Selects a repo module from the list of available repos.

Options

• :label - The label to display to the user when selecting the repo