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#!/usr/bin/ruby
require 'json'
news = File.read("NEWS.md")
prev = news[/since the \*+(\d+\.\d+\.\d+)\*+/, 1]
prevs = [prev, prev.sub(/\.\d+\z/, '')]
update = ->(list, type, desc = "updated") do
news.sub!(/^\*( +)The following #{type} gems? (?:are|is) #{desc}\.\n(\n*)\K(?: \1\*( +).*\n)*\n*/) do
mark = "#{$1&.<< " "}*#{$3 || ' '}"
list.map {|g, v|"#{mark}#{g} #{v}\n"}.join("") + $2
end
end
ARGV.each do |type|
last = JSON.parse(File.read("#{type}_gems.json"))['gems'].filter_map do |g|
v = g['versions'].values_at(*prevs).compact.first
g = g['gem']
g = 'RubyGems' if g == 'rubygems'
[g, v] if v
end.to_h
changed = File.foreach("gems/#{type}_gems").filter_map do |l|
next if l.start_with?("#")
g, v = l.split(" ", 3)
next unless v
[g, v] unless last[g] == v
end
if type == 'bundled'
changed, added = changed.partition {|g, _| last[g]}
end
update[changed, type] or next
if added and !added.empty?
update[added, 'default', 'now bundled gems'] or next
end
File.write("NEWS.md", news)
end
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