Deprecation: remove components from controller paths. Canonicalize RAILS_ROOT by using File.expand_path on Windows, which doesn't have to worry about symlinks, and Pathname#realpath elsewhere, which respects symlinks in relative paths but is incompatible with Windows. Closes #6755.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6445 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/CHANGELOG

@@ -1,5 +1,9 @@
 *SVN*
 
+* Canonicalize RAILS_ROOT by using File.expand_path on Windows, which doesn't have to worry about symlinks, and Pathname#realpath elsewhere, which respects symlinks in relative paths but is incompatible with Windows.  #6755 [Jeremy Kemper, trevor]
+
+* Deprecation: remove components from controller paths.  [Jeremy Kemper]
+
 * Add environment variable RAILS_DEFAULT_DATABASE, which allows the builtin default of 'mysql' to be overridden. [Nicholas Seckar]
 
 * Windows: include MinGW in RUBY_PLATFORM check.  #2982 [okkez000@gmail.com, Kaspar Schiess]

railties/environments/boot.rb

@@ -1,15 +1,6 @@
 # Don't change this file. Configuration is done in config/environment.rb and config/environments/*.rb
 
-unless defined?(RAILS_ROOT)
-  root_path = File.join(File.dirname(__FILE__), '..')
-
-  unless RUBY_PLATFORM =~ /(:?mswin|mingw)/
-    require 'pathname'
-    root_path = Pathname.new(root_path).cleanpath(true).to_s
-  end
-
-  RAILS_ROOT = root_path
-end
+RAILS_ROOT = "#{File.dirname(__FILE__)}/.." unless defined?(RAILS_ROOT)
 
 unless defined?(Rails::Initializer)
   if File.directory?("#{RAILS_ROOT}/vendor/rails")

railties/lib/initializer.rb

@@ -1,9 +1,12 @@
 require 'logger'
 require 'set'
-require File.join(File.dirname(__FILE__), 'railties_path')
-require File.join(File.dirname(__FILE__), 'rails/version')
-require File.join(File.dirname(__FILE__), 'rails/plugin/locator')
-require File.join(File.dirname(__FILE__), 'rails/plugin/loader')
+require 'pathname'
+
+$LOAD_PATH.unshift File.dirname(__FILE__)
+require 'railties_path'
+require 'rails/version'
+require 'rails/plugin/locator'
+require 'rails/plugin/loader'
 
 
 RAILS_ENV = (ENV['RAILS_ENV'] || 'development').dup unless defined?(RAILS_ENV)
@@ -307,10 +310,10 @@ module Rails
 
     def initialize_temporary_directories
       if configuration.frameworks.include?(:action_controller)
-        session_path = "#{RAILS_ROOT}/tmp/sessions/"
+        session_path = "#{configuration.root_path}/tmp/sessions/"
         ActionController::Base.session_options[:tmpdir] = File.exist?(session_path) ? session_path : Dir::tmpdir
 
-        cache_path = "#{RAILS_ROOT}/tmp/cache/"
+        cache_path = "#{configuration.root_path}/tmp/cache/"
         if File.exist?(cache_path)
           ActionController::Base.fragment_cache_store = :file_store, cache_path
         end
@@ -336,7 +339,7 @@ module Rails
     end
 
     def load_application_initializers
-      Dir["#{RAILS_ROOT}/config/initializers/**/*.rb"].each do |initializer|
+      Dir["#{configuration.root_path}/config/initializers/**/*.rb"].each do |initializer|
         load(initializer)
       end
     end
@@ -362,6 +365,9 @@ module Rails
   #   config = Rails::Configuration.new
   #   Rails::Initializer.run(:process, config)
   class Configuration
+    # The application's base directory.
+    attr_reader :root_path
+
     # A stub for setting options on ActionController::Base
     attr_accessor :action_controller
 
@@ -456,6 +462,8 @@ module Rails
     # Create a new Configuration instance, initialized with the default
     # values.
     def initialize
+      set_root_path!
+
       self.frameworks                   = default_frameworks
       self.load_paths                   = default_load_paths
       self.load_once_paths              = default_load_once_paths
@@ -477,6 +485,23 @@ module Rails
       end
     end
 
+    # Set the root_path to RAILS_ROOT and canonicalize it.
+    def set_root_path!
+      raise 'RAILS_ROOT is not set' unless defined?(::RAILS_ROOT)
+      raise 'RAILS_ROOT is not a directory' unless File.directory?(::RAILS_ROOT)
+
+      @root_path =
+        # Pathname is incompatible with Windows, but Windows doesn't have
+        # real symlinks so File.expand_path is safe.
+        if RUBY_PLATFORM =~ /(:?mswin|mingw)/
+          File.expand_path(::RAILS_ROOT)
+
+        # Otherwise use Pathname#realpath which respects symlinks.
+        else
+          Pathname.new(::RAILS_ROOT).realpath.to_s
+        end
+    end
+
     # Loads and returns the contents of the #database_configuration_file. The
     # contents of the file are processed via ERB before being sent through
     # YAML::load.
@@ -536,10 +561,6 @@ module Rails
     end
 
     private
-      def root_path
-        ::RAILS_ROOT
-      end
-
       def framework_root_path
         defined?(::RAILS_FRAMEWORK_ROOT) ? ::RAILS_FRAMEWORK_ROOT : "#{root_path}/vendor/rails"
       end
@@ -596,7 +617,7 @@ module Rails
       end
 
       def default_controller_paths
-        paths = [ File.join(root_path, 'app', 'controllers'), File.join(root_path, 'components') ]
+        paths = [File.join(root_path, 'app', 'controllers')]
         paths.concat builtin_directories
         paths
       end

railties/lib/railties_path.rb

@@ -1 +1 @@
-RAILTIES_PATH = File.expand_path(File.join(File.dirname(__FILE__), '..'))
+RAILTIES_PATH = File.join(File.dirname(__FILE__), '..')