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Ressourcen:

• Episode 135: Making a Gem
• Gem Building is Defunct
• Gemcutter
• RubyGems GemSpec Reference
• Jeweler
• Full episode source code

sudo gem update --system
sudo gem install gemcutter
gem tumble
gem build uniquify.gemspec
gem push uniquify-0.1.0.gem
sudo gem install jeweler
rake --tasks
rake version:write
rake version:bump:minor
rake gemcutter:release

# Rakefile
begin
  require 'jeweler'
  Jeweler::Tasks.new do |gemspec|
    gemspec.name = "uniquify"
    gemspec.summary = "Generate a unique token with Active Record."
    gemspec.description = "Generate a unique token with Active Record."
    gemspec.email = "ryan@railscasts.com"
    gemspec.homepage = "http://github.com/ryanb/uniquify"
    gemspec.authors = ["Ryan Bates"]
  end
  Jeweler::GemcutterTasks.new
rescue LoadError
  puts "Jeweler not available. Install it with: sudo gem install jeweler -s http://gemcutter.org"
end

# uniquify.gemspec
Gem::Specification.new do |s|
  s.name = %q{uniquify}
  s.version = "0.1.0"

  s.required_rubygems_version = Gem::Requirement.new(">= 1.2") if s.respond_to? :required_rubygems_version=
  s.authors = ["Ryan Bates"]
  s.date = %q{2008-11-09}
  s.description = %q{Generate a unique token with Active Record.}
  s.email = %q{ryan@railscasts.com}
  s.extra_rdoc_files = ["lib/uniquify.rb", "README.rdoc"]
  s.files = ["lib/uniquify.rb", "Rakefile", "README.rdoc", "Manifest", "uniquify.gemspec"]
  s.has_rdoc = true
  s.homepage = %q{http://github.com/ryanb/uniquify}
  s.rdoc_options = ["--line-numbers", "--inline-source", "--title", "Uniquify", "--main", "README.rdoc"]
  s.require_paths = ["lib"]
  s.rubyforge_project = %q{uniquify}
  s.rubygems_version = %q{1.2.0}
  s.summary = %q{Generate a unique token with Active Record.}

  if s.respond_to? :specification_version then
    current_version = Gem::Specification::CURRENT_SPECIFICATION_VERSION
    s.specification_version = 2

    if current_version >= 3 then
    else
    end
  else
  end
end