Module: ReactOnRailsPro::V8LogProcessor

Defined in:
lib/react_on_rails_pro/v8_log_processor.rb

Class Method Summary collapse

Class Method Details

.delete_files(log_files, log_dir) ⇒ Object 



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# File 'lib/react_on_rails_pro/v8_log_processor.rb', line 48

def self.delete_files(log_files, log_dir)
  log_files.each { |file| FileUtils.rm(File.join(log_dir, File.basename(file))) }
end

.move_files(log_files, log_dir) ⇒ Object 



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# File 'lib/react_on_rails_pro/v8_log_processor.rb', line 29

def self.move_files(log_files, log_dir)
  log_files.each { |file| FileUtils.mv(file, log_dir) }
end

.process_each_file(log_files, log_dir) ⇒ Object

Processes each log file into a separate JSON profile and logs progress. Returns the number of files processed.



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# File 'lib/react_on_rails_pro/v8_log_processor.rb', line 35

def self.process_each_file(log_files, log_dir)
  total_files = log_files.length
  log_files.each_with_index do |file, index|
    filename = File.basename(file, ".log")
    json_filename = "#{filename}.profile.v8log.json"
    Dir.chdir(log_dir) do
      system("node --prof-process --preprocess -j #{File.basename(file)} > #{json_filename}")
    end
    puts "Processed file #{index + 1} of #{total_files} (#{((index + 1).to_f / total_files * 100).round(2)}%)"
  end
  total_files # Return the number of processed files
end

.process_v8_logs(keep_files, output_dir) ⇒ Object 



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# File 'lib/react_on_rails_pro/v8_log_processor.rb', line 18

def self.process_v8_logs(keep_files, output_dir)
  FileUtils.mkdir_p(output_dir)
  log_files = Dir.glob("isolate-*.log")
  return unless user_confirms_processing(log_files)

  move_files(log_files, output_dir)
  processed_count = process_each_file(log_files, output_dir)
  delete_files(log_files, output_dir) unless keep_files
  puts "#{processed_count} files have been processed."
end

.user_confirms_processing(log_files) ⇒ Object

Warns if many files and asks for user confirmation to proceed.



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# File 'lib/react_on_rails_pro/v8_log_processor.rb', line 53

def self.user_confirms_processing(log_files)
  if log_files.count > 100
    puts "Warning: There are many log files (#{log_files.count}), this may take some time."
    puts "Do you want to continue? [y/N]: "
    response = $stdin.gets.chomp.downcase
    return response == "y"
  end
  true
end