y2bump

#!/usr/bin/env ruby
#
# y2bump - bump the version and add a changelog entry
#
# Author: Stasiek Michalski <hellcp@opensuse.org>
# Copyright 2019
#

require "optparse"

options = {}

OptionParser.new do |parser|
  parser.banner = "Usage: y2bump [options]"
  parser.on("-h", "--help", "Show this help message") do
    puts parser
  end
  parser.on("-d", "--directory [STRING]", "Directory containing .spec and .changes") do |v|
    options[:directory] = v
  end
  parser.on("-m", "--message [STRING]", "Text of the changelog entry") do |v|
    options[:message] = v
  end
  parser.on("-v", "--version [STRING]", "Version of the package (optional)") do |v|
    options[:message] = v
  end
  parser.on("-p", "--packager [STRING]", "Packager string (optional)") do |v|
    options[:packager] = v
  end
end.parse!

def update_version(directory, text, version, packager)
  directory = directory.nil? ? '.' : directory
  Dir.glob("#{directory}/*.spec") do |specfile|
    File.open("#{specfile}.tmp", 'w') do |fo|
      File.foreach(specfile) do |li|
        if li.chomp.include? 'Version:'
          # Spaces calculated manually in case the number of spaces is non-standard
          spaces = li.chomp.strip.count(' ')
          # If version wasn't specified, this checks and bumps the version by 1
          if version.nil?
            version = /(?<=(Version:\s{#{spaces}}))(.*)/.match(li.chomp).to_s
            version_arr = version.split('.')
            version_arr[version_arr.length - 1] = Integer(version_arr.last) + 1
            version = version_arr.join('.')
          end
          version_li = li.chomp.sub(/(?<=(Version:\s{#{spaces}}))(.*)/, version)
          fo.puts version_li
        else
          fo.puts li
        end
      end
    end
    File.delete(specfile)
    File.rename("#{specfile}.tmp", specfile)
    puts "Specfile (#{specfile}) updated to the version #{version}"

    # Changes file doesn't need to exist for this to work
    changes = "#{directory}/#{File.basename(specfile, '.spec')}.changes"
    changelog = ''
    # Changelog is updated without the help of osc, to avoid additional dependencies
    File.open("#{changes}.tmp", 'w') do |fo|
      fo.puts "-" * 67
      time = Time.new
      day_format = time.strftime("%-d")
      day = day_format.length == 2 ? day_format : " #{day_format}"
      current_time = time.strftime "%a %b #{day} %H:%M:%S UTC %Y"
      gitconfig = File.expand_path("~/.gitconfig")
      if File.exists?(gitconfig) && packager.nil?
        git_info = Hash[File.open(gitconfig).read.scan(/(.*)?=\s*?(.*)/).map { |k,v| [k.strip, v.strip] }]
        packager = "#{git_info["name"]} <#{git_info["email"]}>"
      end
      fo.puts "#{current_time} - #{packager}\n"
      text.split('\n') do |li|
        changelog += "\n- " + li.scan(/.{1,65}.*?(?:\b|$)/).map { |x| x.strip }.join("\n  ")
      end unless text.nil?
      fo.puts changelog
      fo.puts "- #{version}\n\n"
      File.foreach(changes) do |li|
        fo.puts li
      end if File.exists?(changes)
    end
    File.delete(changes) if File.exists?(changes)
    File.rename("#{changes}.tmp", changes)
    output = "Changes (#{changes}) updated to the version #{version}"
    output += " with a changelog#{changelog}" unless changelog.empty?
    puts output
  end
end

update_version(options[:directory], options[:message], options[:version], options[:packager])