Regroup outdated gems into major, minor & patch verions. Run `bundle outdated | regroup_gems`

regroup_gems

#!/usr/bin/env ruby

outdated_gems = ARGF.read

hash = { major: [], minor: [], patch: [] }
group_hash = {}
outdated_gems.split("\r").each do |line|
  line.delete!("\n")
  gem_name, installed, newest, _requested, group_name = line.split(/\s{2,}/)
  if gem_name.nil? || gem_name == 'Gem' || newest.nil? || newest.scan(/\./).empty?
    $stdout.puts line
    next
  end

  newest_subversions = newest.split('.').map(&:to_i)
  installed_subversions = installed.split('.').map(&:to_i)

  top_version = newest_subversions.find do |v|
    index = newest_subversions.index(v)
    v > installed_subversions[index]
  end

  top_version_index = newest_subversions.index(top_version)
  type = case top_version_index
         when 0
           :major
         when 1
           :minor
         else
           :patch
         end

  if group_name
    group_hash[group_name] ||= { major: [], minor: [], patch: [] }
    group_hash[group_name][type].push line
  else
    hash[type].push line
  end
end

$stdout.puts "\n"
group_hash.each do |group_name, type_hash|
  $stdout.puts "### In '#{group_name}' group\n"
  $stdout.puts
  type_hash.each do |type, gem_lines|
    $stdout.puts "#### #{type} version\n" if gem_lines.any?
    gem_lines.each do |line|
      $stdout.puts line
    end
    $stdout.puts
  end
  $stdout.puts "---"
  $stdout.puts
end

$stdout.puts "\n"
$stdout.puts "### In dependencies (without group)\n"
$stdout.puts

hash.each do |type, gem_lines|
  $stdout.puts "### #{type}\n"
  gem_lines.each do |line|
    $stdout.puts line
  end
  $stdout.puts
end