roll-over-ChangeLogs

#!/usr/bin/env ruby

# Copyright (C) 2009 Apple Inc. All rights reserved.
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require 'date'

CHANGELOG_SIZE_THRESHOLD = 750 * 1024

scripts_directory = File.dirname(__FILE__)
base_directory = File.expand_path(ARGV[0] || `perl -I#{scripts_directory} -Mwebkitdirs -e 'print sourceDir();'`)

date_suffix = Date.today.strftime("-%Y-%m-%d")

Dir.chdir base_directory
`find . -type f -name 'ChangeLog'`.split.each do |path|
    next unless File.stat(path).size > CHANGELOG_SIZE_THRESHOLD

    old_path = "#{path}#{date_suffix}"
    puts "Moving #{path} to #{old_path}..."
    system "git", "mv", path, old_path
    File.open path, "w" do |file|
        file.write "== Rolled over to ChangeLog#{date_suffix} ==\n"
    end
    system "git", "add", path
end