* lib/logger.rb: Add shift_period_suffix option [Fix GH-10772]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54639 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/logger.rb

@@ -366,13 +366,17 @@ class Logger
   #   Logging formatter. Default values is an instance of Logger::Formatter.
   # +datetime_format+::
   #   Date and time format. Default value is '%Y-%m-%d %H:%M:%S'.
+  # +shift_period_suffix+::
+  #   The log file suffix format for +daily+, +weekly+ or +monthly+ rotation.
+  #   Default is '%Y%m%d'.
   #
   # === Description
   #
   # Create an instance.
   #
   def initialize(logdev, shift_age = 0, shift_size = 1048576, level: DEBUG,
-                 progname: nil, formatter: nil, datetime_format: nil)
+                 progname: nil, formatter: nil, datetime_format: nil,
+                 shift_period_suffix: '%Y%m%d')
     self.level = level
     self.progname = progname
     @default_formatter = Formatter.new
@@ -381,7 +385,8 @@ class Logger
     @logdev = nil
     if logdev
       @logdev = LogDevice.new(logdev, :shift_age => shift_age,
-        :shift_size => shift_size)
+        :shift_size => shift_size,
+        :shift_period_suffix => shift_period_suffix)
     end
   end
 
@@ -660,13 +665,14 @@ private
     attr_reader :filename
     include MonitorMixin
 
-    def initialize(log = nil, shift_age: nil, shift_size: nil)
-      @dev = @filename = @shift_age = @shift_size = nil
+    def initialize(log = nil, shift_age: nil, shift_size: nil, shift_period_suffix: nil)
+      @dev = @filename = @shift_age = @shift_size = @shift_period_suffix = nil
       mon_initialize
       set_dev(log)
       if @filename
         @shift_age = shift_age || 7
         @shift_size = shift_size || 1048576
+        @shift_period_suffix = shift_period_suffix || '%Y%m%d'
         @next_rotate_time = next_rotate_time(Time.now, @shift_age) unless @shift_age.is_a?(Integer)
       end
     end
@@ -822,15 +828,15 @@ private
     end
 
     def shift_log_period(period_end)
-      postfix = period_end.strftime("%Y%m%d") # YYYYMMDD
-      age_file = "#{@filename}.#{postfix}"
+      suffix = period_end.strftime(@shift_period_suffix)
+      age_file = "#{@filename}.#{suffix}"
       if FileTest.exist?(age_file)
         # try to avoid filename crash caused by Timestamp change.
         idx = 0
         # .99 can be overridden; avoid too much file search with 'loop do'
         while idx < 100
           idx += 1
-          age_file = "#{@filename}.#{postfix}.#{idx}"
+          age_file = "#{@filename}.#{suffix}.#{idx}"
           break unless FileTest.exist?(age_file)
         end
       end

test/logger/test_logdevice.rb

@@ -293,6 +293,34 @@ class TestLogDevice < Test::Unit::TestCase
     end
   end
 
+  def test_shifting_period_suffix
+    # shift_age other than 'daily', 'weekly', and 'monthly' means 'everytime'
+    {
+      "%Y%m%d" => Logger.new(@filename, 'now', 1048576), # default
+      "%Y-%m-%d" => Logger.new(@filename, 'now', 1048576, shift_period_suffix: '%Y-%m-%d')
+    }.each do |format, logger|
+      begin
+        yyyymmdd = Time.now.strftime(format)
+        filename1 = @filename + ".#{yyyymmdd}"
+        filename2 = @filename + ".#{yyyymmdd}.1"
+        filename3 = @filename + ".#{yyyymmdd}.2"
+        logger.info("0" * 15)
+        logger.info("0" * 15)
+        logger.info("0" * 15)
+        logger.info("0" * 15)
+        assert(File.exist?(@filename))
+        assert(File.exist?(filename1))
+        assert(File.exist?(filename2))
+        assert(File.exist?(filename3))
+      ensure
+        logger.close if logger
+        [filename1, filename2, filename3].each do |filename|
+          File.unlink(filename) if File.exist?(filename)
+        end
+      end
+    end
+  end
+
   def test_shifting_size_in_multiprocess
     tmpfile = Tempfile.new([File.basename(__FILE__, '.*'), '_1.log'])
     logfile = tmpfile.path