check-outdated-yarn.rb

require 'json'

output = `yarn outdated --json`

json = JSON.parse(output)

items = if json['type'] == 'table'
  keys = json['data']['head']
  json['data']['body'].map do |row|
    Hash[*row.map.with_index{|v,i| [keys[i], v] }.flatten]
  end
else
  raise "Can't parse output"
end

skipped, outdated = items.partition{|i| (i['Latest'].include?('-') && !i['Current'].include?('-')) || i['Latest'] == 'exotic' }

puts "Skipped:"

skipped.each do |s|
  puts "  #{s['Package']}: #{s['Current']} (#{s['Latest']})"
end

puts "\nOutdated:"

outdated.each do |s|
  puts "  #{s['Package']}: #{s['Current']} (#{s['Latest']})"
end