build.rb

#!/usr/bin/ruby

# directory git should contain 2 branches: origin/master and debian


system("rm -rf debian && mkdir debian")
Dir.chdir('git')
system('git remote update && git reset --hard origin/master')
version = `git describe`.chomp

version = version[1..-1]
if version =~ /^([\d\.]+)(-(\d+)-(g.*))?$/ then
  tag_version = $1
  counter = $3
  git_version = $4

  if counter then
    tag_version += '.0' if tag_version =~ /^\d+\.\d+$/ #tag consists only 2 parts
    tag_version += '.' + counter

    debian_version = tag_version + '+' + git_version
  else
    debian_version = tag_version
  end
else
  raise "Cannot parse version #{version}"
end

# Thu, 03 Nov 2011 18:04:11 -0700
curr_time = Time.now.strftime('%a, %d %b %Y %H:%M:%S %z')

changelog=<<END
tup (#{debian_version}) lucid; urgency=low

  [ Anatol Pomozov ]
  * Daily build for Lucid.

 -- Anatol Pomozov <anatol.pomozov@gmail.com>  #{curr_time}
END

File.open("contrib/debian/changelog", "w") {|c|
  c.write(changelog)
}

build_sh = File.read('build.sh')
build_sh.sub!('label=${TUP_LABEL:-bootstrap}', %Q{label="#{version}"})
File.open('build.sh', 'w') { |f| f.write(build_sh) }

system("git mv contrib/debian .")
system("git commit -am 1")

system("git archive --format=tar --prefix=tup-#{tag_version}/ HEAD | gzip > ../debian/tup_#{debian_version}.orig.tar.gz")
system("git reset --hard HEAD~")

Dir.chdir('../debian')
system("tar -xzvf tup_#{debian_version}.orig.tar.gz > /dev/null")
Dir.chdir("tup-#{tag_version}")

system('debuild -S')

exit

Dir.chdir('..')
system("dput ppa:anatol/tup tup_#{debian_version}_source.changes")