Command line tool to read emails through Mailman

mailman.rb

# frozen_string_literal: true
# This file defines the configuration for mail reading through pop3 protocol
# using 'Mailman' library. Place this file inside `config/initializers` if you are on Rails.

# Poll interval must be specified seconds, it defaults to 10 seconds
Mailman.config.poll_interval = (ENV['MAILBOX_POLL_INTERVAL'] || 10).to_i

# POP3 settings
Mailman.config.pop3 = {
  server: ENV['POP3_SERVER'],
  port: (ENV['POP3_PORT'] || 995).to_i,
  ssl: (ENV['SSL_ENABLED_IN_POP3_SERVER'] == 'true'),
  username: ENV['POP3_USERNAME'],
  password: ENV['POP3_PASSWORD']
}

readmail

#!/usr/bin/env ruby
# This file must be placed under `bin` folder of project's root directory.
# frozen_string_literal: true
require File.expand_path('../config/environment', __dir__)

print_help_and_exit = false
daemonizable = false
logfile = nil

ARGV.each_with_index do |arg, index|
  case arg
  when '-h', '--help'         then print_help_and_exit = true
  when '-l', '--logfile'      then logfile = ARGV[index + 1]
  when '-d', '--daemonize'    then daemonizable = true
  end
end

if print_help_and_exit
  puts 'readmail [...OPTIONS]'
  puts '-d or --daemonize            Daemonize the process'
  puts '-l or --logfile [FILE]       Path to logfile'
  puts '-h or --help                 Prints this message'
else
  logger = ::Logger.new(logfile || ::Logger::STDOUT)
  ::Process.daemon(true, true) if daemonizable

  Mailman::Application.run do
    default do
      begin
        logger.info message.from.first
        logger.info message.to.first
        logger.info message.subject
      rescue StandardError => er
        Mailman.logger.fatal er.message
      end
    end
  end
end