Contours

Contours provids objects for building configuration.

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add contours

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install contours

Usage

Build a configuration object by creating a class that inherits from Contours::BlendedHash and define the configuration attributes.

Specify a list of keys that should be blended into the configuration object by setting the @blended_keys variable on the class.

class Configuration < Contours::BlendedHash
  @blended_keys = %i[class data]
end

Create a new object using init

config = Configuration.init({class: "test", data: [1, 2, 3]})

The config object will be able to be merged with other configuration objects.

config.merge(Configuration.init({class: "overwrite", data: [4, 5, 6]}))

config.to_h # => {class: "overwrite", data: [1, 2, 3, 4, 5, 6]}

You can specify a custom way to blend the values for the @blended_keys

class Configuration < Contours::BlendedHash
  @blended_keys = %i[class data]

  blend(:class, with: Contours::StructuredString)

  blend :data do |existing, new_value|
    existing.sum(new_value.sum)
  end
end

config.merge(Configuration.init({class: "overwrite", data: [4, 5, 6]}))

config.to_h # => {class: "test overwrite", data: 21}

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also 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, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/SOFware/contours.