release.rake

namespace :do do

  desc 'update changelog'
  task :changelog do
    # Pass in git opts by opts="-5" # -5 is number of commits
    File.open('CHANGELOG', 'w+') do |changelog|
      `git log -z --tags --abbrev-commit --no-color --format=fuller #{ENV['opts']}`.split("\0").each do |commit|
        next if commit =~ /^Merge: \d*/
        ref, author, author_time, commiter, commiter_time, _, title, message = commit.split("\n", 8)

        next if author =~ /^Merge: \d*/
        ref = ref[/commit ([0-9a-f]+)/, 1]

        author = author[/Author: (.*)/, 1].strip
        author_time = Time.parse(author_time[/AuthorDate: (.*)/, 1]).utc

        commiter = commiter[/^Commit: (.*)/, 1].strip
        commiter_time = Time.parse(commiter_time[/CommitDate: (.*)/, 1]).utc

        title.strip!
        title = "* #{title}" unless title =~ /^\s*\*/
        message = "\t#{message}" unless title =~ /^\s*\*/
        message.gsub!(/^\s*/, "")
        message.gsub!(/\n/, " ")

        puts [ref, author, author_time, commiter, commiter_time, title, message].join("\n") + "---\n"

        # changelog.puts "[#{ref} | #{time}] #{author}"
        changelog.puts "#{title}#{': ' + message if message && !message.blank?}"
      end
    end
  end

end