make new rails apps log to STDOUT

activesupport/lib/active_support/tagged_logging.rb

@@ -54,6 +54,14 @@ module ActiveSupport
         end
     end
 
+    def self.create(f, formatter, level)
+      logger = ActiveSupport::Logger.new f
+      logger.formatter = formatter
+      logger = new(logger)
+      logger.level = ActiveSupport::Logger.const_get(level.to_s.upcase)
+      logger
+    end
+
     def self.new(logger)
       # Ensure we set a default formatter so we aren't extending nil!
       logger.formatter ||= ActiveSupport::Logger::SimpleFormatter.new

activesupport/test/tagged_logging_test.rb

@@ -22,6 +22,17 @@ class TaggedLoggingTest < ActiveSupport::TestCase
     assert logger.formatter.respond_to?(:tagged)
   end
 
+  test 'creates a tagged logger with the appropriate level and formatter' do
+    stringio = StringIO.new
+    logger = ActiveSupport::TaggedLogging.create(stringio, ActiveSupport::Logger::SimpleFormatter.new, :debug)
+    logger.debug("foo")
+
+    assert_not_nil logger.formatter
+    assert logger.formatter.respond_to?(:tagged)
+    assert_equal 0, logger.level
+    assert stringio.string.include?("foo")
+  end
+
   test "tagged once" do
     @logger.tagged("BCX") { @logger.info "Funky time" }
     assert_equal "[BCX] Funky time\n", @output.string

railties/CHANGELOG.md

@@ -1,5 +1,9 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   New rails apps log to STDOUT by default
+
+    *Terence Lee*
+
 *   Add support for generate scaffold password:digest
 
     * adds password_digest attribute to the migration

railties/lib/rails/application/bootstrap.rb

@@ -39,11 +39,7 @@ INFO
           f.binmode
           f.sync = config.autoflush_log # if true make sure every write flushes
 
-          logger = ActiveSupport::Logger.new f
-          logger.formatter = config.log_formatter
-          logger = ActiveSupport::TaggedLogging.new(logger)
-          logger.level = ActiveSupport::Logger.const_get(config.log_level.to_s.upcase)
-          logger
+          logger = ActiveSupport::TaggedLogging.create(f, config.log_formatter, config.log_level)
         rescue StandardError
           logger = ActiveSupport::TaggedLogging.new(ActiveSupport::Logger.new(STDERR))
           logger.level = ActiveSupport::Logger::WARN

railties/lib/rails/generators/rails/app/templates/config/application.rb

@@ -32,5 +32,7 @@ module <%= app_const_base %>
     # Disable the asset pipeline.
     config.assets.enabled = false
 <% end  -%>
+
+    config.logger = ActiveSupport::TaggedLogging.create(STDOUT, config.log_formatter, config.log_level)
   end
 end

railties/test/application/configuration_test.rb

@@ -670,5 +670,26 @@ module ApplicationTests
         end
       end
     end
+
+    test "set logger to STDOUT by default" do
+      stdout = capture(:stdout) do
+        app = build_app
+
+        controller :omg, <<-RUBY
+          class OmgController < ApplicationController
+            def index
+              Rails.logger.info "HI MOM"
+              render text: "omg"
+            end
+          end
+        RUBY
+
+        require "#{app_path}/config/environment"
+
+        get "/omg/index"
+      end
+
+      assert stdout.include?("HI MOM"), "STDOUT does not include 'HI MOM', #{stdout}"
+    end
   end
 end