Add a new file containing tasks related to releasing

tasks/release.rb

+FRAMEWORKS = %w( activesupport activemodel activerecord activeresource actionpack actionmailer railties )
+
+root    = File.expand_path('../../', __FILE__)
+version = File.read("#{root}/RAILS_VERSION").strip
+
+directory "dist"
+
+(FRAMEWORKS + ['rails']).each do |framework|
+  namespace framework do
+    gem     = "dist/#{framework}-#{version}.gem"
+    gemspec = "#{framework}.gemspec"
+
+    task :clean do
+      rm_f gem
+    end
+
+    task :update_version_rb do
+      glob = root.dup
+      glob << "/#{framework}/lib/*" unless framework == "rails"
+      glob << "/version.rb"
+
+      file = Dir[glob].first
+      ruby = File.read(file)
+
+      major, minor, tiny, pre = version.split('.')
+      pre ||= "nil"
+
+      ruby.gsub! /^(\s*)MAJOR = .*?$/, "\\1MAJOR = #{major}"
+      raise "Could not insert MAJOR in #{file}" unless $1
+
+      ruby.gsub! /^(\s*)MINOR = .*?$/, "\\1MINOR = #{minor}"
+      raise "Could not insert MINOR in #{file}" unless $1
+
+      ruby.gsub! /^(\s*)TINY  = .*?$/, "\\1TINY  = #{tiny}"
+      raise "Could not insert TINY in #{file}" unless $1
+
+      ruby.gsub! /^(\s*)PRE   = .*?$/, "\\1PRE   = #{pre}"
+      raise "Could not insert PRE in #{file}" unless $1
+
+      File.open(file, 'w') { |f| f.write ruby }
+    end
+
+    task gem => %w(update_version_rb dist) do
+      cmd = ""
+      cmd << "cd #{framework} && " unless framework == "rails"
+      cmd << "gem build #{gemspec} && mv #{framework}-#{version}.gem #{root}/dist/"
+      sh cmd
+    end
+
+    task :build => [:clean, gem]
+    task :install => :build do
+      sh "gem install #{gem}"
+    end
+
+    task :push => :build do
+      sh "gem push #{gem}"
+    end
+  end
+end
+
+namespace :git do
+  task :tag do
+    sh "git tag v#{version}"
+  end
+end
+
+namespace :all do
+  task :build   => FRAMEWORKS.map { |f| "#{f}:build"   } + ['rails:build']
+  task :install => FRAMEWORKS.map { |f| "#{f}:install" } + ['rails:install']
+  task :push    => FRAMEWORKS.map { |f| "#{f}:push"    } + ['rails:push']
+end
+
+__END__
+version = ARGV.pop
+
+%w( activesupport activemodel activerecord activeresource actionpack actionmailer railties ).each do |framework|
+  puts "Building and pushing #{framework}..."
+  `cd #{framework} && gem build #{framework}.gemspec && gem push #{framework}-#{version}.gem && rm #{framework}-#{version}.gem`
+end
+
+puts "Building and pushing Rails..."
+`gem build rails.gemspec`
+`gem push rails-#{version}.gem`
+`rm rails-#{version}.gem`
+