RakeでRidgepoleコマンドを実行する ref: https://qiita.com/lhside/items/0dcad79d9b801e34bc7c

file0.txt

bundle exec ridgepole --apply --file Schemafile --config config/database.yml

file2.txt

Apply ridgepole schema
$ bundle exec rake ridgepole:apply 

Export ridgepole schema
$ bundle exec rake ridgepole:export

ridgepole.rake

namespace :ridgepole do
  desc 'Apply database schema'
  task apply: :environment do
    ridgepole('--apply', "--file #{schema_file}")
    Rake::Task['db:schema:dump'].invoke
  end

  desc 'Export database schema'
  task export: :environment do
    ridgepole('--export', "--output #{schema_file}")
  end

  private

  def schema_file
    Rails.root.join('Schemafile')
  end

  def config_file
    Rails.root.join('config/database.yml')
  end

  def ridgepole(*options)
    command = ['bundle exec ridgepole', "--config #{config_file}"]
    system [command + options].join(' ')
  end
end