Convert markdown inline links to link definitions

awesomer.rb

# For https://github.com/guard/guard/blob/master/CHANGELOG.md

input, output, people = File.read('CHANGELOG.md'), "", {}

input.each_line do |line|
  if found = line.match(/\[@(\w+)\]\(([\w:\/.]+)\)/)
    user, url = found[1], found[2]
    people[user] = url unless people.include?(user)
  end
end

people = people.sort { |p1, p2| p1[0] <=> p2[0] }

output += input.gsub(/\[@(\w+)\]\(([\w:\/.]+)\)/, '[@\1][]')
output += "\n"
people.each do |user, url|
  output += "[@#{user}]: #{url}\n"
end

puts output