ruby_app_build.rb

require_relative "../lib/dagger_ruby"

DaggerRuby.connection do |client|
  cache = client.cache_volume("bundle-cache")
  app_dir = client.host.directory(File.join(__dir__, "dummy_app"))

  puts "Building Ruby Sinatra application..."

  container = client.container
                    .from("ruby:4.0.6")
                    .with_mounted_cache("/usr/local/bundle", cache)
                    .with_directory("/app", app_dir)
                    .with_workdir("/app")
                    .with_exec(%w[bundle install])

  puts "✅ Dependencies installed with bundle install"

  syntax_check = container
                 .with_exec(["ruby", "-c", "app.rb"])
                 .stdout

  puts "✅ App syntax check passed: #{syntax_check.strip}"

  dependency_check = container
                     .with_exec(["ruby", "-e", "require_relative 'app'; puts 'Dependencies loaded successfully'"])
                     .stdout

  puts "✅ Dependencies check: #{dependency_check.strip}"

  startup_test = container
                 .with_exec(["timeout", "5", "ruby", "-e", "
      require_relative 'app'
      puts 'App can start successfully'
      puts 'Sinatra version: ' + Sinatra::VERSION
      puts 'Ruby version: ' + RUBY_VERSION
    "])
                 .stdout

  puts "✅ Startup test results:"
  puts startup_test

  puts "📦 Container is ready for deployment!"
  puts "   To run: docker run -p 4567:4567 <image>"
  puts "   Endpoints available:"
  puts "   - GET / (welcome message)"
  puts "   - GET /health (health check)"
  puts "   - GET /info (app info)"

  container_id = container.id
  puts "🆔 Container ID: #{container_id}"
end