From 25e293adf21f5fd5661d75b24908304df34ab820 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 27 Oct 2015 03:00:38 +0000
Subject: logger.rb: fix weekly rotation

* lib/logger.rb (Logger::Period#next_rotate_time): get rid of
  adding to mday not to exceed the days of the month.
  [ruby-core:71185] [Bug #11620]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                     |  6 ++++++
 lib/logger.rb                 |  8 +++++---
 test/logger/test_logdevice.rb | 32 +++++++++++++++++++++++++++++++-
 3 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 95a87063d5..b773c88ce0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Oct 27 12:00:33 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/logger.rb (Logger::Period#next_rotate_time): get rid of
+	  adding to mday not to exceed the days of the month.
+	  [ruby-core:71185] [Bug #11620]
+
 Mon Oct 26 22:43:03 2015  yui-knk  <spiketeika@gmail.com>
 
 	* test/ruby/test_module.rb (test_method_defined): Add test cases
diff --git a/lib/logger.rb b/lib/logger.rb
index bb4953e437..354d5aff71 100644
--- a/lib/logger.rb
+++ b/lib/logger.rb
@@ -539,12 +539,14 @@ private
         t = Time.mktime(now.year, now.month, now.mday) + SiD * (7 - now.wday)
       when 'monthly'
         t = Time.mktime(now.year, now.month, 1) + SiD * 31
-        mday = (1 if t.mday > 1)
+        return Time.mktime(t.year, t.month, 1) if t.mday > 1
       else
         return now
       end
-      if mday or t.hour.nonzero? or t.min.nonzero? or t.sec.nonzero?
-        t = Time.mktime(t.year, t.month, mday || (t.mday + (t.hour > 12 ? 1 : 0)))
+      if t.hour.nonzero? or t.min.nonzero? or t.sec.nonzero?
+        hour = t.hour
+        t = Time.mktime(t.year, t.month, t.mday)
+        t += SiD if hour > 12
       end
       t
     end
diff --git a/test/logger/test_logdevice.rb b/test/logger/test_logdevice.rb
index becf53191d..bdd6e35b01 100644
--- a/test/logger/test_logdevice.rb
+++ b/test/logger/test_logdevice.rb
@@ -365,6 +365,8 @@ class TestLogDevice < Test::Unit::TestCase
     end
   end
 
+  env_tz_works = /linux|darwin|freebsd/ =~ RUBY_PLATFORM # borrow from test/ruby/test_time_tz.rb
+
   def test_shifting_dst_change
     Dir.mktmpdir do |tmpdir|
       assert_in_out_err([{"TZ"=>"Europe/London"}, *%W"--disable=gems -rlogger -C#{tmpdir} -"], <<-'end;')
@@ -401,7 +403,35 @@ class TestLogDevice < Test::Unit::TestCase
       assert_not_match(/hello-1/, cont)
       assert_file.exist?(log+".20140330")
     end
-  end if /linux|darwin|freebsd/ =~ RUBY_PLATFORM # borrow from test/ruby/test_time_tz.rb
+  end if env_tz_works
+
+  def test_shifting_weekly_dst_change
+    Dir.mktmpdir do |tmpdir|
+      assert_separately([{"TZ"=>"Europe/London"}, *%W"-rlogger -C#{tmpdir} -"], <<-'end;')
+        begin
+          module FakeTime
+            attr_accessor :now
+          end
+
+          class << Time
+            prepend FakeTime
+          end
+
+          log = "log"
+          File.open(log, "w") {}
+
+          Time.now = Time.mktime(2015, 10, 25, 0, 1, 1)
+          dev = Logger::LogDevice.new("log", shift_age: 'weekly')
+          dev.write("#{Time.now} hello-1\n")
+        ensure
+          dev.close if dev
+        end
+      end;
+      log = File.join(tmpdir, "log")
+      cont = File.read(log)
+      assert_match(/hello-1/, cont)
+    end
+  end if env_tz_works
 
   private
 
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