Rakefile

require 'rake/clean'
require 'rexml/document'

def nupkg(nuspec)
  name = File.basename(nuspec, '.nuspec')
  doc = REXML::Document.new(File.open(nuspec))
  version = REXML::XPath.first(doc, '/package/metadata/version').text

  "#{name}.#{version}.nupkg"
end

CLOBBER.include('**/*.nupkg')

SPECS = FileList['packages/**/*.nuspec']
PACKAGES = SPECS.map{ |file| File.join('bin', nupkg(file)) }

task :default => [:pack]

directory 'bin'

desc 'Build all packages'
task :pack => PACKAGES

desc 'Optimize icons'
task :optimize do
  `git ls-files --others --modified --exclude-standard -- *.png`.split("\n").each do |file|
    system("pngout \"#{file}\"")
  end
end

SPECS.zip PACKAGES do |nuspec, nupkg|
  file nupkg => ['bin', nuspec] do
    nuspec = File.expand_path(nuspec)
    Dir.chdir('bin') do
      system("choco pack \"#{nuspec}\"")
    end
  end
end