```ruby
PACKS_PATH        = Rails.root.join('public/packs')
PACK_DIGESTS_PATH = PACKS_PATH.join('digests.json')

WEBPACKER_APP_TEMPLATE_PATH = File.expand_path('../install/template.rb', File.dirname(__FILE__))

namespace :webpacker do
  desc "compile javascript packs using webpack for production with digests"
  task :compile do
    webpack_digests_json = JSON.parse(`WEBPACK_ENV=production ./bin/webpack --json`)['assetsByChunkName'].to_json

    FileUtils.mkdir_p(PACKS_PATH)
    File.open(PACK_DIGESTS_PATH, 'w+') { |file| file.write webpack_digests_json }

    puts "Compiled digests for all packs in #{PACK_DIGESTS_PATH}: "
    puts webpack_digests_json
  end

  desc "install webpacker in this application"
  task :install do
    exec "./bin/rails app:template LOCATION=#{WEBPACKER_APP_TEMPLATE_PATH}"
  end
end
```

Add task for installing react requirements and configuring them against the default
user
```ruby
PACKS_PATH        = Rails.root.join('public/packs')
PACK_DIGESTS_PATH = PACKS_PATH.join('digests.json')

WEBPACKER_APP_TEMPLATE_PATH = File.expand_path('../install/template.rb', File.dirname(__FILE__))

namespace :webpacker do
  desc "compile javascript packs using webpack for production with digests"
  task :compile do
    webpack_digests_json = JSON.parse(`WEBPACK_ENV=production ./bin/webpack --json`)['assetsByChunkName'].to_json

    FileUtils.mkdir_p(PACKS_PATH)
    File.open(PACK_DIGESTS_PATH, 'w+') { |file| file.write webpack_digests_json }

    puts "Compiled digests for all packs in #{PACK_DIGESTS_PATH}: "
    puts webpack_digests_json
  end

  desc "install webpacker in this application"
  task :install do
    exec "./bin/rails app:template LOCATION=#{WEBPACKER_APP_TEMPLATE_PATH}"
  end

  desc "add everything needed for react"
  task :react do
    config_path = Rails.root.join('config/webpack/shared.js')

    config = File.read(config_path)

    if config.include?("presets: ['es2015']")
      puts "Replacing loader presets to include react in #{config_path}"
      new_config = config.gsub(/presets: \['es2015'\]/, "presets: ['react', 'es2015']")
      File.write config_path, new_config
    else
      puts "Couldn't automatically update loader presets in #{config_path}. Please set presets: ['react', 'es2015']."
    end

    exec './bin/yarn add babel-preset-react react react-dom'
  end
end
```
assistant