require_relative "generate/generate"
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,h,c,inc},ext/pack/COPYING*}')
gem_package  = "zscan-#{version}.gem"
generate_src = [__FILE__, *Dir.glob('generate/*')]

desc "generate, build and test, and pack gem"
task :default => [:gen, :test, gem_package]

desc "build and test"
task :test => 'ext/Makefile' do
  sh "make -C ext"
  sh "rspec"
end

file 'ext/Makefile' do
  Dir.chdir 'ext' do
    sh "ruby extconf.rb"
  end
end

desc "pack gem"
file gem_package => gem_files + Generate.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
  puts "packing files:"
  puts '-' * 40
  puts gem_files
  puts '-' * 40
  sh "gem build zscan.gemspec"
end

desc "generate files"
task :gen => Generate.files

Generate.files.each do |name|
  file name => generate_src do
    puts "generating #{name}"
    r = Generate.generate(name)
    File.open name, 'w' do |f|
      f.puts "#{name.end_with?('rb') ? '#' : '//'} generated by rake gen"
      f << r
    end
  end
end