Get a list of direct dependencies for a gem using the RubyGems.org API

get_dependencies.rb

def get_dependencies(gem_name)
  # query rubygems.org api for dependencies of gem_name
  # return array of dependencies
  # requires uri, net/http, and json
  uri = URI("https://rubygems.org/api/v1/gems/#{gem_name}.json")
  response = Net::HTTP.get_response(uri)
  res = JSON.parse(response.body) if response.is_a?(Net::HTTPSuccess)
  res["dependencies"]["runtime"].map { |dep| dep["name"] }
end