class Jeweler::Commands::CheckDependencies

def self.build_for(jeweler)
  command = new
  command.gemspec = jeweler.gemspec
  command
end

def dependencies
  case type
  when :runtime, :development
    gemspec.send("#{type}_dependencies")
  else
    gemspec.dependencies
  end
  
end

def run
  missing_dependencies = dependencies.select do |dependency|
    begin
      Gem.activate dependency.name, dependency.version_requirements.to_s
      false
    rescue LoadError => e
      true
    end
  end
  if missing_dependencies.empty?
    puts "#{type || 'All'} dependencies seem to be installed."
  else
    puts "Missing some dependencies. Install them with the following commands:"
    missing_dependencies.each do |dependency|
      puts %Q{\tgem install #{dependency.name} --version "#{dependency.version_requirements}"}
    end
    
    abort "Run the specified gem commands before trying to run this again: #{$0} #{ARGV.join(' ')}"
  end
  
end