Add TaggedLogging#logger constructor for more pleasant logging interface (rails#52994)

Author: dhh

activesupport/lib/active_support/tagged_logging.rb

@@ -113,6 +113,11 @@ def self.extended(base)
       end
     end
 
+    # Returns an `ActiveSupport::Logger` that has already been wrapped with tagged logging concern.
+    def self.logger(*args, **kwargs)
+      new ActiveSupport::Logger.new(*args, **kwargs)
+    end
+
     def self.new(logger)
       logger = logger.clone
 

activesupport/test/tagged_logging_test.rb

@@ -142,6 +142,14 @@ def flush(*)
 
     assert_equal "[BCX] [Jason] Funky time\n[BCX] Junky time!\n", @output.string
   end
+
+  test "implicit logger instance" do
+    @output = StringIO.new
+    @logger = ActiveSupport::TaggedLogging.logger(@output)
+
+    @logger.tagged("BCX") { @logger.info "Funky time" }
+    assert_equal "[BCX] Funky time\n", @output.string
+  end
 end
 
 class TaggedLoggingWithoutBlockTest < ActiveSupport::TestCase

railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt

@@ -55,7 +55,7 @@ Rails.application.configure do
 
   # Log to STDOUT with the current request id as a default log tag.
   config.log_tags = [ :request_id ]
-  config.logger   = ActiveSupport::TaggedLogging.new(ActiveSupport::Logger.new(STDOUT))
+  config.logger   = ActiveSupport::TaggedLogging.logger(STDOUT)
 
   # "info" includes generic and useful information about system operation, but avoids logging too much
   # information to avoid inadvertent exposure of personally identifiable information (PII). If you