discourse/lib/tasks/redis.rake

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task 'redis:clean_up' => ['environment'] do
return unless Rails.configuration.multisite
dbs = RailsMultisite::ConnectionManagement.all_dbs
dbs << Discourse::SIDEKIQ_NAMESPACE
regexp = /((\$(?<message_bus>\w+)$)|(^?(?<namespace>\w+):))/
cursor = 0
redis = $redis.without_namespace
loop do
cursor, keys = redis.scan(cursor)
cursor = cursor.to_i
redis.multi do
keys.each do |key|
if match = key.match(regexp)
db_name = match[:message_bus] || match[:namespace]
if !dbs.include?(db_name)
redis.del(key)
end
end
end
end
break if cursor == 0
end
end