1 files changed, 118 insertions, 0 deletions
diff --git a/railties/lib/rails/info.rb b/railties/lib/rails/info.rb
new file mode 100644
index 0000000000..9502876ebb
--- /dev/null
+++ b/railties/lib/rails/info.rb
@@ -0,0 +1,118 @@
+require "cgi"
+
+module Rails
+  module Info
+    mattr_accessor :properties
+    class << (@@properties = [])
+      def names
+        map {|val| val.first }
+      end
+
+      def value_for(property_name)
+        if property = assoc(property_name)
+          property.last
+        end
+      end
+    end
+
+    class << self #:nodoc:
+      def property(name, value = nil)
+        value ||= yield
+        properties << [name, value] if value
+      rescue Exception
+      end
+
+      def frameworks
+        %w( active_record action_pack action_view action_mailer active_support active_model )
+      end
+
+      def framework_version(framework)
+        if Object.const_defined?(framework.classify)
+          require "#{framework}/version"
+          framework.classify.constantize.version.to_s
+        end
+      end
+
+      def to_s
+        column_width = properties.names.map {|name| name.length}.max
+        info = properties.map do |name, value|
+          value = value.join(", ") if value.is_a?(Array)
+          "%-#{column_width}s   %s" % [name, value]
+        end
+        info.unshift "About your application's environment"
+        info * "\n"
+      end
+
+      alias inspect to_s
+
+      def to_html
+        '<table>'.tap do |table|
+          properties.each do |(name, value)|
+            table << %(<tr><td class="name">#{CGI.escapeHTML(name.to_s)}</td>)
+            formatted_value = if value.kind_of?(Array)
+                  "<ul>" + value.map { |v| "<li>#{CGI.escapeHTML(v.to_s)}</li>" }.join + "</ul>"
+                else
+                  CGI.escapeHTML(value.to_s)
+                end
+            table << %(<td class="value">#{formatted_value}</td></tr>)
+          end
+          table << '</table>'
+        end
+      end
+    end
+
+    # The Ruby version and platform, e.g. "2.0.0-p247 (x86_64-darwin12.4.0)".
+    property 'Ruby version' do
+      "#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL} (#{RUBY_PLATFORM})"
+    end
+
+    # The RubyGems version, if it's installed.
+    property 'RubyGems version' do
+      Gem::RubyGemsVersion
+    end
+
+    property 'Rack version' do
+      ::Rack.release
+    end
+
+    # The Rails version.
+    property 'Rails version' do
+      Rails.version.to_s
+    end
+
+    property 'JavaScript Runtime' do
+      ExecJS.runtime.name
+    end
+
+    # Versions of each Rails framework (Active Record, Action Pack,
+    # Action Mailer, and Active Support).
+    frameworks.each do |framework|
+      property "#{framework.titlecase} version" do
+        framework_version(framework)
+      end
+    end
+
+    property 'Middleware' do
+      Rails.configuration.middleware.map(&:inspect)
+    end
+
+    # The application's location on the filesystem.
+    property 'Application root' do
+      File.expand_path(Rails.root)
+    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
+
+    property 'Database schema version' do
+      ActiveRecord::Migrator.current_version rescue nil
+    end
+  end
+end