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# frozen_string_literal: true
require_relative '../../migration_helpers'
module RuboCop
module Cop
module Migration
class WithLockRetriesDisallowedMethod < RuboCop::Cop::Cop
include MigrationHelpers
ALLOWED_MIGRATION_METHODS = %i[
create_table
create_hash_partitions
drop_table
add_foreign_key
remove_foreign_key
add_column
remove_column
execute
change_column_default
change_column_null
remove_foreign_key_if_exists
remove_foreign_key_without_error
rename_index
table_exists?
index_exists_by_name?
foreign_key_exists?
index_exists?
column_exists?
create_trigger_to_sync_tables
].sort.freeze
MSG = "The method is not allowed to be called within the `with_lock_retries` block, the only allowed methods are: #{ALLOWED_MIGRATION_METHODS.join(', ')}"
MSG_ONLY_ONE_FK_ALLOWED = "Avoid adding more than one foreign key within the `with_lock_retries`. See https://docs.gitlab.com/ee/development/migration_style_guide.html#examples"
def_node_matcher :send_node?, <<~PATTERN
send
PATTERN
def_node_matcher :add_foreign_key?, <<~PATTERN
(send nil? :add_foreign_key ...)
PATTERN
def on_block(node)
block_body = node.body
return unless in_migration?(node)
return unless block_body
return unless node.method_name == :with_lock_retries
if send_node?(block_body)
check_node(block_body)
else
block_body.children.each { |n| check_node(n) }
end
end
def check_node(node)
return unless send_node?(node)
name = node.children[1]
add_offense(node, location: :expression) unless ALLOWED_MIGRATION_METHODS.include?(name)
add_offense(node, location: :selector, message: MSG_ONLY_ONE_FK_ALLOWED) if multiple_fks?(node)
end
def multiple_fks?(node)
return unless add_foreign_key?(node)
count = node.parent.each_descendant(:send).count do |node|
add_foreign_key?(node)
end
count > 1
end
end
end
end
end
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