Class: LangsmithrbRails::Generators::TracingGenerator

Inherits:
Rails::Generators::Base
  • Object
show all
Defined in:
lib/generators/langsmithrb_rails/tracing/tracing_generator.rb

Overview

Generator for adding LangSmith tracing to Rails applications

Instance Method Summary collapse

Instance Method Details

#create_directories ⇒ Object 



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# File 'lib/generators/langsmithrb_rails/tracing/tracing_generator.rb', line 55

def create_directories
  empty_directory "app/middleware/langsmithrb_rails"
  empty_directory "app/services/concerns"
  empty_directory "app/jobs/concerns"
end

#create_job_concern ⇒ Object 



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# File 'lib/generators/langsmithrb_rails/tracing/tracing_generator.rb', line 19

def create_job_concern
  template "langsmith_traced_job.rb", "app/jobs/concerns/langsmith_traced_job.rb"
end

#create_middleware ⇒ Object 



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# File 'lib/generators/langsmithrb_rails/tracing/tracing_generator.rb', line 11

def create_middleware
  template "request_tracing.rb", "app/middleware/langsmithrb_rails/request_tracing.rb"
end

#create_service_concern ⇒ Object 



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# File 'lib/generators/langsmithrb_rails/tracing/tracing_generator.rb', line 15

def create_service_concern
  template "langsmith_traced.rb", "app/services/concerns/langsmith_traced.rb"
end

#display_post_install_message ⇒ Object 



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# File 'lib/generators/langsmithrb_rails/tracing/tracing_generator.rb', line 61

def display_post_install_message
  say "\n"
  say "LangSmith tracing has been added to your Rails application! 🎉", :green
  say "\n"
  say "Usage:", :yellow
  say "  1. Use the LangsmithTraced concern in your services:", :yellow
  say "     include LangsmithTraced", :yellow
  say "     LangsmithTraced.trace(name: 'my_operation', type: 'llm') { ... }", :yellow
  say "  2. Use the LangsmithTracedJob concern in your jobs:", :yellow
  say "     include LangsmithTracedJob", :yellow
  say "\n"
  say "To add a local buffer for traces, run:", :yellow
  say "  bin/rails g langsmithrb_rails:buffer", :yellow
  say "\n"
end

#update_application_config ⇒ Object 



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# File 'lib/generators/langsmithrb_rails/tracing/tracing_generator.rb', line 23

def update_application_config
  application_rb_path = "config/application.rb"
  
  if File.exist?(application_rb_path)
    middleware_line = "    config.middleware.use LangsmithrbRails::RequestTracing"
    
    # Check if middleware is already configured
    if File.read(application_rb_path).include?(middleware_line)
      say_status :skip, "Middleware already configured in application.rb", :yellow
    else
      # Find the class Application < Rails::Application line
      application_content = File.read(application_rb_path)
      
      if application_content =~ /class Application < Rails::Application/
        inject_into_file application_rb_path, after: "class Application < Rails::Application\n" do
          "            # Use LangSmith request tracing middleware\n            \#{middleware_line}\n          \n          RUBY\n        end\n        \n        say_status :insert, \"Added middleware to application.rb\", :green\n      else\n        say_status :error, \"Could not find the Application class in application.rb\", :red\n      end\n    end\n  else\n    say_status :error, \"Could not find application.rb\", :red\n  end\nend\n"