Wiki::Yggdrasil

You. You're up late at night again reading up on some obscure mathematical topic. You find yourself with so many open tabs on Wikipedia. Wouldn't it be nice if you could just pick an article, and then view a tree of the articles it references?

Introducing Wiki::Yggdrasil. Named after the tree in Norse mythology that drinks from the well of all wisdom, Wiki::Yggdrasil is here to help you drink just as deeply from the well of wisdom that is Wikipedia.

Wiki::Yggdrasil takes a Wikipedia URI as an argument, and proceeds to spider out a dependency tree of referenced articles.

Usage

require 'wiki/yggdrasil'

@tree               = Wiki::Yggdrasil::Yggdrasil.new(uri: 'http://en.wikipedia.org/wiki/Yggdrasil')
referenced_articles = @tree.children(depth: 1) ## A hash of of articles linked by the parent

The preceeding code produces a structure as follows:

{:name=>"Help:IPA/English", :children=>[]}
{:name=>"Help:IPA/English", :children=>[]}
{:name=>"Old Norse", :children=>[]}
{:name=>"Help:IPA", :children=>[]}
{:name=>"Trees in mythology", :children=>[]}
{:name=>"Norse cosmology", :children=>[]}
{:name=>"<i>Poetic Edda</i>", :children=>[]}
{:name=>"<i>Prose Edda</i>", :children=>[]}
{:name=>"Snorri Sturluson", :children=>[]}
{:name=>"<i>Fraxinus excelsior</i>", :children=>[]}
{:name=>"Æsir", :children=>[]}
{:name=>"Thing (assembly)", :children=>[]}
{:name=>"Urðarbrunnr", :children=>[]}
{:name=>"Hvergelmir", :children=>[]}
{:name=>"Mímisbrunnr", :children=>[]}
{:name=>"Níðhöggr", :children=>[]}
{:name=>"Veðrfölnir and eagle", :children=>[]}
{:name=>"Dáinn, Dvalinn, Duneyrr and Duraþrór", :children=>[]}
{:name=>"Sacred trees and groves in Germanic paganism and mythology", :children=>[]}
{:name=>"Ragnarök", :children=>[]}

FAQ

This is taking a long time. Is that normal?

Yes. This is normal. Any Yggdrasil object created with a depth of three or higher will likely take a few minutes to scrape the necessary information.

Installation

Add this line to your application's Gemfile:

gem 'wiki-yggdrasil'

And then execute:

$ bundle

Or install it yourself as:

$ gem install wiki-yggdrasil

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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 tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/alex0112/wiki-yggdrasil.

License

The gem is available as open source under the terms of the MIT License.