licenses.rb

require 'json'

JSON.parse(ARGF.read).map do |package, value|
  package_name = package.split('@')[-2]

  puts "\n"

  if value["url"]
    puts "[#{package_name}](#{value["url"]})"
    puts "="*(package_name.length + value["url"].length + 4)
  else
    puts package_name
    puts "="*package_name.length
  end

  puts "\nPublisher: #{value["publisher"]}\n" if value["publisher"]

  puts "\n"
  if value["licenseFile"]
    puts File.read(value["licenseFile"]).lines.map { |l| "    #{l}"}
  else
    puts "No license file was available but the source code is available "\
      "under #{value["licenses"]}\n"
  end
end

Usage:

npm install -g license-checker
license-checker --production --relativeLicensePath --json | ruby ../licenses.rb