get_dependency_sources.rb

require 'json'
require 'net/http'
require 'uri'

results = []

deps = %w(insert dependencies here)
deps.each do |dep|
  begin
    puts "working on #{dep} "
    uri = URI.parse("https://rubygems.org/api/v1/gems/#{dep}.json")
    response = Net::HTTP.get_response(uri)
    json = JSON.parse(response.body)
    results << (json['source_code_uri'] || json['homepage_uri'])
  rescue => ex
    puts "Exception: #{ex}"
  end
end

puts results