Kungfuig

Kungfuig (pronounced: [ˌkʌŋˈfig]) provides a drastically easy way to plug configuration into everything.

Config on steroids

This gem allows to (including but not limited to):

• easily attach a configuration to any class and/or instance;
• attach basic aspects to any existing method on before and after pointcuts;
• bulk attach aspects as defined by yaml configuration file (see Bulk aspects assignment.)
• bulk attach sidekiq jobs as aspects as defined by yaml configuration file (see Bulk jobs assignment.)
• thread-safe configure nested / derived classes / instances.

Eastern eggs:

• easy way to handle console colors:
  • Color.to_xterm256('Hello, world!', :info)
  • Color.to_xterm256('Hello, world!', :success)
  • Color.to_xterm256('Hello, world!', '#FFFF00')

Usage

class MyApp
  include Kungfuig
end

# Load configuration file
MyApp.kungfuig('config/myapp.yml')

# Append options explicitly
MyApp.kungfuig do |options|
  options.value = 42
end

# load options from JSON file and execute block on it
MyApp.kungfuig('config/myapp.json') do |options|
  options.other_value = options[:value]
end

# DSL (note `kungfuig` method name)
MyApp.kungfuigure do
  set :value, 42
end

Aspect to be called on method execution

class MyApp
  include Kungfuig
  def report
    # ...
    42
  end
end

MyApp.kungfuigure do
  aspect :report do |result|  # or just MyApp.aspect :report do |result|
    puts "MyApp#report returned #{result}"
  end
end

MyApp.new.report
#⇒ "MyApp#report returned 42"

Bulk aspects assignment

it 'accepts YAML for bulk attach' do
    yaml = <<YAML
'Test':
  after:
    '*': 'MyLogger#debug_after_method_call'
  before:
    'shutdown': 'MyLogger#info_before_shutdown_call'
YAML
expect(Kungfuig::Aspector.bulk(yaml)).to be_truthy
expect(test.yo(42)).to eq ['Answer given']

in the example above, MyLogger#debug_after_method_call will be called after all methods of Test class, and MyLogger#info_before_shutdown_call—before Test#shutdown.

Bulk jobs assignment

Kungfuig::Jobber.bulk("#{Rails.root}/config/my_app.yml")

config/my_app.yml

'SessionsController':
  'login': 'OnLoginJob'
'UsersController':
  'show': 'OnUsersShownJob'

in the example above, OnLoginJob will be executed after SessionsController#login method is called, and OnUsersShownJob—after UsersController#show.

Jobs perform format

The job’s perform method will be called with four parameters:

job.perform_async(receiver, method, result, *args)

• receiver — the actual method receiver, serialized to the hash (see below);
• method — the actual method name;
• result — the result of call to the method (nil for before filters);
• args — arguments, passed to the method; objects will be lost (cast to String instance as by Sidekiq convention.)

respond_to = ->(m, r) { r.respond_to? m.to_sym }
r = case receiver
    when Hash, Array, String then receiver
    when respond_to.curry[:to_hash] then receiver.to_hash
    when respond_to.curry[:to_h] then receiver.to_h
    else receiver
    end
job.perform_async(r, method, result, *args)

Installation

Add this line to your application's Gemfile:

gem 'kungfuig'

And then execute:

$ bundle

Or install it yourself as:

$ gem install kungfuig

Include/extend each class/instance you want to have configuration options

Development

After checking out the repo, run bin/setup to install dependencies. Then, run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

1. Fork it ( https://github.com/[my-github-username]/kungfuig/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request