Added Rails::Info to catalog assorted information about a Rails application's environment

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2882 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 66 insertions, 0 deletions

diff --git a/railties/lib/info.rb b/railties/lib/info.rb
new file mode 100644
index 0000000000..74cb41e8bc
--- /dev/null
+++ b/railties/lib/info.rb
@@ -0,0 +1,66 @@
+module Rails
+  module Info
+    mattr_accessor :properties
+    @@properties = []
+  
+    class << self #:nodoc:
+      def property(name, value = nil)
+        value ||= yield
+        properties << [name, value] if value 
+      rescue Exception
+      end
+
+      def components
+        %w(active_record action_pack action_web_service 
+           action_mailer active_support)
+      end
+      
+      def component_version(component)
+        require "#{component}/version"
+        "#{component.classify}::Version::STRING".constantize
+      end
+      
+      def edge_rails_revision
+        svn_info[/^Revision: (\d+)/, 1] || 'unknown'
+      end
+      
+    protected
+      def svn_info
+        Dir.chdir("#{RAILS_ROOT}/vendor/rails") do
+          IO.popen('svn info') { |f| f.read }
+        end
+      end
+    end
+
+    # The Ruby version and platform, e.g. "1.8.2 (powerpc-darwin8.2.0)".
+    property 'Ruby version', "#{RUBY_VERSION} (#{RUBY_PLATFORM})"
+
+    # The RubyGems version, if it's installed.
+    property 'RubyGems version' do
+      Gem::RubyGemsVersion
+    end
+  
+    # Versions of each Rails component (Active Record, Action Pack, 
+    # Action Web Service, Action Mailer, and Active Support).
+    components.each do |component|
+      property "#{component.titlecase} version" do 
+        component_version(component)
+      end
+    end
+  
+    # The Rails SVN revision, if it's checked out into vendor/rails.
+    property 'Edge Rails revision' do
+      edge_rails_revision
+    end
+  
+    # The current Rails environment (development, test, or production).
+    property 'Environment' do
+      RAILS_ENV
+    end
+    
+    # The name of the database adapter for the current environment.
+    property 'Database adapter' do
+      ActiveRecord::Base.configurations[RAILS_ENV]['adapter']
+    end
+  end
+end