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# frozen_string_literal: true
require_relative '../../migration_helpers'
module RuboCop
module Cop
module Migration
class VersionedMigrationClass < RuboCop::Cop::Base
include MigrationHelpers
ENFORCED_SINCE = 2023_01_12_00_00_00
DOC_LINK = "https://docs.gitlab.com/ee/development/migration_style_guide.html#migration-helpers-and-versioning"
MSG_INHERIT = "Don't inherit from ActiveRecord::Migration or old versions of Gitlab::Database::Migration. " \
"Use Gitlab::Database::Migration[2.1] instead. See #{DOC_LINK}.".freeze
MSG_INCLUDE = "Don't include migration helper modules directly. " \
"Inherit from Gitlab::Database::Migration[2.1] instead. See #{DOC_LINK}.".freeze
GITLAB_MIGRATION_CLASS = 'Gitlab::Database::Migration'
ACTIVERECORD_MIGRATION_CLASS = 'ActiveRecord::Migration'
CURRENT_MIGRATION_VERSION = 2.1 # Should be the same value as Gitlab::Database::Migration.current_version
def_node_search :includes_helpers?, <<~PATTERN
(send nil? :include
(const
(const
(const nil? :Gitlab) :Database) :MigrationHelpers))
PATTERN
def on_class(node)
return unless relevant_migration?(node)
return unless activerecord_migration_class?(node) || old_version_migration_class?(node)
add_offense(node, message: MSG_INHERIT)
end
def on_send(node)
return unless relevant_migration?(node)
add_offense(node, message: MSG_INCLUDE) if includes_helpers?(node)
end
private
def relevant_migration?(node)
in_migration?(node) && version(node) >= ENFORCED_SINCE
end
def activerecord_migration_class?(node)
superclass(node) == ACTIVERECORD_MIGRATION_CLASS
end
def superclass(class_node)
_, *others = class_node.descendants
others.find { |node| node.const_type? && node&.const_name != 'Types' }&.const_name
end
# Returns true for any parent class of format Gitlab::Database::Migration[version] if version < current_version
def old_version_migration_class?(class_node)
parent_class_node = class_node.parent_class
return false unless parent_class_node.send_type? && parent_class_node.arguments.last.float_type?
return false unless parent_class_node.children[0].const_name == GITLAB_MIGRATION_CLASS
parent_class_node.arguments[0].value < CURRENT_MIGRATION_VERSION
end
end
end
end
end
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