Class: Turbo::Hmr::Generators::InstallGenerator

Inherits:
Rails::Generators::Base
  • Object
show all
Defined in:
lib/generators/turbo/hmr/install_generator.rb

Instance Method Summary collapse

Instance Method Details

#update_application_js ⇒ Object 



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# File 'lib/generators/turbo/hmr/install_generator.rb', line 15

def update_application_js
  application_js_path = "app/javascript/application.js"

  # Read the existing content to determine where to add the code
  if File.exist?(application_js_path)
    content = File.read(application_js_path)

    # Add the import at the top if not already present
    unless content.include?('from "turbo-hmr"')
      prepend_to_file application_js_path, "import { start as startTurboHmr } from \"turbo-hmr\"\n"
    end

    # Add the start call after Stimulus is initialized
    unless content.include?("startTurboHmr")
      # Try to add after Application.start() or window.Stimulus assignment
      if content.match(/(?:const|let|var)\s+(\w+)\s*=.*Application\.start\(\)/)
        app_var = Regexp.last_match(1)
        inject_into_file application_js_path, "\nstartTurboHmr(#{app_var})\n",
          after: /#{app_var}\s*=.*Application\.start\(\)/
      elsif content.match(/window\.Stimulus\s*=.*Application\.start\(\)/)
        inject_into_file application_js_path, "\nstartTurboHmr(window.Stimulus)\n",
          after: /window\.Stimulus\s*=.*Application\.start\(\)/
      else
        append_to_file application_js_path, "\n// Start turbo-hmr (adjust the application variable name as needed)\n// startTurboHmr(application)\n"
      end
    end
  else
    create_file application_js_path, <<~JS
      import { start as startTurboHmr } from "turbo-hmr"
      import { Application } from "@hotwired/stimulus"

      const application = Application.start()
      startTurboHmr(application)
    JS
  end
end

#update_importmap ⇒ Object 



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# File 'lib/generators/turbo/hmr/install_generator.rb', line 11

def update_importmap
  append_to_file "config/importmap.rb", %(pin "turbo-hmr", to: "turbo-hmr.js"\n)
end