Ruby 2.4 allows custom suffix of rotated log files

In Ruby, The Logger class can be used for rotating log files daily, weekly or monthly.

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2daily_logger = Logger.new('foo.log', 'daily')
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4weekly_logger = Logger.new('foo.log', 'weekly')
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6monthly_logger = Logger.new('foo.log', 'monthly')
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At the end of the specified period, Ruby will change the file extension of the log file as follows:

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2foo.log.20170615
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The format of the suffix for the rotated log file is %Y%m%d. In Ruby 2.3, there was no way to customize this suffix format.

Ruby 2.4 added the ability to customize the suffix format by passing an extra argument shift_period_suffix.

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2# Ruby 2.4
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4logger = Logger.new('foo.log', 'weekly', shift_period_suffix: '%d-%m-%Y')
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Now, suffix of the rotated log file will use the custom date format which we passed.

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2foo.log.15-06-2017
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