def copy(destination, sources, options = {})
copied = []
FileUtils.mkdir_p(destination) unless File.exists?(destination)
destination_migrations = ActiveRecord::Migrator.migrations(destination)
last = destination_migrations.last
sources.each do |scope, path|
source_migrations = ActiveRecord::Migrator.migrations(path)
source_migrations.each do |migration|
source = File.read(migration.filename)
source = "# This migration comes from #{scope} (originally #{migration.version})\n#{source}"
if duplicate = destination_migrations.detect { |m| m.name == migration.name }
if options[:on_skip] && duplicate.scope != scope.to_s
options[:on_skip].call(scope, migration)
end
next
end
migration.version = next_migration_number(last ? last.version + 1 : 0).to_i
new_path = File.join(destination, "#{migration.version}_#{migration.name.underscore}.#{scope}.rb")
old_path, migration.filename = migration.filename, new_path
last = migration
File.open(migration.filename, "w") { |f| f.write source }
copied << migration
options[:on_copy].call(scope, migration, old_path) if options[:on_copy]
destination_migrations << migration
end
end
copied
end