nightly_version_generator.rb

# frozen_string_literal: true

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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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require 'date'

version_file, version_suffix = *ARGV
version_suffix ||= Date.today.strftime('%Y%m%d')

contents = File.read(version_file)
contents.gsub!(/VERSION = ['"]([\d.]+\.nightly)['"]/) do
  old_version = Regexp.last_match(1)
  new_version = "#{old_version}.#{version_suffix}"
  puts("#{old_version} -> #{new_version}")
  "VERSION = '#{new_version}'"
end

File.write(version_file, contents)