Dir.chdir __dir__
version_re  = /\d+(\.\d+)*/
version     = `command grep 'VERSION =' lib/zscan.rb`[version_re]
gem_files   = Dir.glob('{rakefile,zscan.gemspec,readme.md,**/*.{rb,c}}')
gem_package = "zscan-#{version}.gem"

desc "build and test"
task :default => [:test, gem_package]

desc "build and run test"
task :test do
  sh "make -C ext"
  sh "rspec"
end

desc "pack gem"
file gem_package => gem_files do
  sh "rm zscan-*.gem"

  new_version = false
  lines = File.readlines('zscan.gemspec')
  lines.each do |line|
    if line =~ /s\.version =/ and (line.sub! version_re, version)
      new_version = true
      break
    end
  end
  if new_version
    File.open('zscan.gemspec', 'w'){|f| f << lines.join }
  end
  sh "gem build zscan.gemspec"
end