使用Rails 5、Ruby 2.4和Capistrano 3在Capistrano部署期间发送电子邮件

gem 'actionmailer', '~> 5.0'

config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
  address: 'smtp.example.com',
  port: 587,
  domain: 'example.com',
  user_name: 'your_username',
  password: 'your_password',
  authentication: 'plain',
  enable_starttls_auto: true
}

class DeploymentMailer < ApplicationMailer
  default from: 'notifications@example.com'

  def deployment_notification(email)
    mail(to: email, subject: 'Deployment Notification')
  end
end

after 'deploy:finished', 'deploy:send_notification'

namespace :deploy do
  desc 'Send deployment notification'
  task :send_notification do
    on roles(:app) do
      DeploymentMailer.deployment_notification('user@example.com').deliver_now
    end
  end
end