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# frozen_string_literal: true
require_relative '../../migration_helpers'
module RuboCop
module Cop
module Migration
# Cop that checks if new indexes are introduced to forbidden tables.
class PreventIndexCreation < RuboCop::Cop::Cop
include MigrationHelpers
FORBIDDEN_TABLES = %i[ci_builds taggings ci_builds_metadata events].freeze
MSG = "Adding new index to #{FORBIDDEN_TABLES.join(", ")} is forbidden, see https://gitlab.com/gitlab-org/gitlab/-/issues/332886"
def on_new_investigation
super
@forbidden_tables_used = false
end
def_node_matcher :add_index?, <<~PATTERN
(send nil? :add_index ({sym|str} #forbidden_tables?) ...)
PATTERN
def_node_matcher :add_concurrent_index?, <<~PATTERN
(send nil? :add_concurrent_index ({sym|str} #forbidden_tables?) ...)
PATTERN
def_node_matcher :forbidden_constant_defined?, <<~PATTERN
(casgn nil? _ ({sym|str} #forbidden_tables?))
PATTERN
def_node_matcher :add_concurrent_index_with_constant?, <<~PATTERN
(send nil? :add_concurrent_index (const nil? _) ...)
PATTERN
def on_casgn(node)
@forbidden_tables_used = !!forbidden_constant_defined?(node)
end
def on_def(node)
return unless in_migration?(node)
node.each_descendant(:send) do |send_node|
add_offense(send_node, location: :selector) if offense?(send_node)
end
end
private
def forbidden_tables?(node)
FORBIDDEN_TABLES.include?(node.to_sym)
end
def offense?(node)
add_index?(node) || add_concurrent_index?(node) || any_constant_used_with_forbidden_tables?(node)
end
def any_constant_used_with_forbidden_tables?(node)
add_concurrent_index_with_constant?(node) && @forbidden_tables_used
end
end
end
end
end
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