Break up rails and railties:

* rails is now a metagem (gem install rails works as it does now)
* railties includes the glue layer, so you can easily declare dependencies
  on railties, actionpack, and actionmailer and not get ActiveRecord's rake
  tasks, initializers, etc.

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "arel"]
 	path = arel
 	url = git://github.com/rails/arel.git
+[submodule "rack"]
+	path = rack
+	url = git://github.com/rails/rack.git

Rakefile

@@ -1,9 +1,10 @@
 require 'rake'
 require 'rake/rdoctask'
+require 'rake/gempackagetask'
 
 env = %(PKG_BUILD="#{ENV['PKG_BUILD']}") if ENV['PKG_BUILD']
 
-PROJECTS = %w(activesupport actionpack actionmailer activeresource activerecord activemodel railties)
+PROJECTS = %w(activesupport activemodel actionpack actionmailer activeresource activerecord railties)
 
 Dir["#{File.dirname(__FILE__)}/*/lib/*/version.rb"].each do |version_path|
   require version_path
@@ -23,11 +24,21 @@ task :default => %w(test test:isolated)
   end
 end
 
+spec = eval(File.read('rails.gemspec'))
+
+Rake::GemPackageTask.new(spec) do |pkg|
+  pkg.gem_spec = spec
+end
+
 task :install => :gem do
+  system %(cd arel && gem build arel.gemspec && gem install arel-0.2.pre.gem --no-ri --no-rdoc --ignore-dependencies)
+  system %(cd rack && rake gem VERSION=1.0.2.pre && gem install rack-1.0.2.pre.gem --no-ri --no-rdoc --ignore-dependencies)
   (PROJECTS - ["railties"]).each do |project|
+    puts "INSTALLING #{project}"
     system("gem install #{project}/pkg/#{project}-#{ActionPack::VERSION::STRING}.gem --no-ri --no-rdoc")
   end
-  system("gem install railties/pkg/rails-#{ActionPack::VERSION::STRING}.gem --no-ri --no-rdoc")
+  system("gem install railties/pkg/railties-#{ActionPack::VERSION::STRING}.gem --no-ri --no-rdoc")
+  system("gem install pkg/rails-#{ActionPack::VERSION::STRING}.gem --no-ri --no-rdoc")
 end
 
 desc "Generate documentation for the Rails framework"

rack

@@ -0,0 +1 @@
+Subproject commit adf996587aecdd604eff441b8b69e4c47a8c2617

rails.gemspec

@@ -8,22 +8,16 @@
     on top of either MySQL, PostgreSQL, SQLite, DB2, SQL Server, or Oracle with eRuby- or Builder-based templates.
   EOF
 
-  s.add_dependency('rake', '>= 0.8.3')
   s.add_dependency('activesupport',    '= 3.0.pre')
-  s.add_dependency('activerecord',     '= 3.0.pre')
   s.add_dependency('actionpack',       '= 3.0.pre')
-  s.add_dependency('actionmailer',     '= 3.0.pre')
+  s.add_dependency('activerecord',     '= 3.0.pre')
   s.add_dependency('activeresource',   '= 3.0.pre')
+  s.add_dependency('actionmailer',     '= 3.0.pre')
+  s.add_dependency('railties',         '= 3.0.pre')
 
   s.rdoc_options << '--exclude' << '.'
   s.has_rdoc = false
 
-  s.files = Dir['CHANGELOG', 'README', 'bin/**/*', 'builtin/**/*', 'guides/**/*', 'lib/**/{*,.[a-z]*}']
-  s.require_path = 'lib'
-  s.bindir = "bin"
-  s.executables = ["rails"]
-  s.default_executable = "rails"
-
   s.author = "David Heinemeier Hansson"
   s.email = "david@loudthinking.com"
   s.homepage = "http://www.rubyonrails.org"

railties/Rakefile

@@ -10,7 +10,7 @@ $LOAD_PATH.unshift "#{File.dirname(__FILE__)}/lib"
 require 'rails/version'
 
 PKG_BUILD       = ENV['PKG_BUILD'] ? '.' + ENV['PKG_BUILD'] : ''
-PKG_NAME        = ENV['PKG_NAME'] || 'rails'
+PKG_NAME        = ENV['PKG_NAME'] || 'railties'
 PKG_VERSION     = Rails::VERSION::STRING + PKG_BUILD
 PKG_FILE_NAME   = "#{PKG_NAME}-#{PKG_VERSION}"
 PKG_DESTINATION = ENV["RAILS_PKG_DESTINATION"] || "../#{PKG_NAME}"
@@ -141,7 +141,7 @@ Rake::RDocTask.new { |rdoc|
 
 # Generate GEM ----------------------------------------------------------------------------
 
-spec = eval(File.read('rails.gemspec'))
+spec = eval(File.read('railties.gemspec'))
 
 Rake::GemPackageTask.new(spec) do |pkg|
   pkg.gem_spec = spec

railties/railties.gemspec

@@ -0,0 +1,28 @@
+Gem::Specification.new do |s|
+  s.platform = Gem::Platform::RUBY
+  s.name = 'railties'
+  s.version = '3.0.pre'
+  s.summary = "Controls boot-up, rake tasks and generators for the Rails framework."
+  s.description = <<-EOF
+    Rails is a framework for building web-application using CGI, FCGI, mod_ruby, or WEBrick
+    on top of either MySQL, PostgreSQL, SQLite, DB2, SQL Server, or Oracle with eRuby- or Builder-based templates.
+  EOF
+
+  s.add_dependency('rake', '>= 0.8.3')
+  s.add_dependency('activesupport',    '= 3.0.pre')
+  s.add_dependency('actionpack',       '= 3.0.pre')
+
+  s.rdoc_options << '--exclude' << '.'
+  s.has_rdoc = false
+
+  s.files = Dir['CHANGELOG', 'README', 'bin/**/*', 'builtin/**/*', 'guides/**/*', 'lib/**/{*,.[a-z]*}']
+  s.require_path = 'lib'
+  s.bindir = "bin"
+  s.executables = ["rails"]
+  s.default_executable = "rails"
+
+  s.author = "David Heinemeier Hansson"
+  s.email = "david@loudthinking.com"
+  s.homepage = "http://www.rubyonrails.org"
+  s.rubyforge_project = "rails"
+end