Rakefile

$gemspec_file = nil
$gemspec = nil

task :gemspec_file do
  $gemspec_file = Dir['*.gemspec'].first unless $gemspec_file
end

task :gemspec do
  load $gemspec_file
  $gemspec = @spec
end
task :gemspec => :gemspec_file

desc 'Create a gem for this project.'
task :gem do
  system "gem build #{$gemspec_file}"
end
task :gem => :gemspec_file

desc 'Install the gem for this project.'
task :install => :gem do
  system "gem install #{$gemspec.name}-#{$gemspec.version}.gem"
end
task :install => [ :gem, :gemspec ]

desc 'Remove the gem installed by this project.'
task :uninstall do
  system "gem uninstall #{$gemspec.name} --version #{$gemspec.version}"
end
task :uninstall => :gemspec

desc 'Delete gem.'
task :clean do
  system 'rm -f *.gem'
end

task :sign do
  gem = "#{$gemspec.name}-#{$gemspec.version}.gem"
  system "gpg --sign --detach #{gem}"
  system "sha1sum #{gem} > #{gem}.sha"
end
task :sign => [:gem, :gemspec]

task :dist => [:gem, :sign]