mastodon/lib/mastodon/cli_helper.rb

# frozen_string_literal: true

dev_null = Logger.new('/dev/null')

Rails.logger                 = dev_null
ActiveRecord::Base.logger    = dev_null
ActiveJob::Base.logger       = dev_null
HttpLog.configuration.logger = dev_null
Paperclip.options[:log]      = false

module Mastodon
  module CLIHelper
    def create_progress_bar(total = nil)
      ProgressBar.create(total: total, format: '%c/%u |%b%i| %e')
    end

    def parallelize_with_progress(scope)
      ActiveRecord::Base.configurations[Rails.env]['pool'] = options[:concurrency]

      progress  = create_progress_bar(scope.count)
      pool      = Concurrent::FixedThreadPool.new(options[:concurrency])
      total     = Concurrent::AtomicFixnum.new(0)
      aggregate = Concurrent::AtomicFixnum.new(0)

      scope.reorder(nil).find_in_batches do |items|
        futures = []

        items.each do |item|
          futures << Concurrent::Future.execute(executor: pool) do
            ActiveRecord::Base.connection_pool.with_connection do
              begin
                progress.log("Processing #{item.id}") if options[:verbose]

                result = yield(item)
                aggregate.increment(result) if result.is_a?(Integer)
              rescue => e
                progress.log pastel.red("Error processing #{item.id}: #{e}")
              ensure
                progress.increment
              end
            end
          end
        end

        total.increment(items.size)
        futures.map(&:value)
      end

      progress.finish

      [total.value, aggregate.value]
    end

    def pastel
      @pastel ||= Pastel.new
    end
  end
end