Example newsyslog configuration for rotating Rails log files on Mac OS X.

newsyslog-for-your-project.conf

# logfilename                                               [owner:group]       mode count size when  flags [/pid_file] [sig_num]
/Users/your-username/path-your-rails-project/log/*.log      your-username:staff 644  4     *    $D0   GJ

# NOTES
#
#   Place file in /etc/newsyslog.d
#   '$D0' under 'when' tells newsyslog to rotate logs daily at midnight.
#   Alternatively you could use '24' for 'when', which would specify "every 24 hours"
#   '*' under 'size' specifies that logs should be rotated regardless of their size.
#   'G' under 'flags' tells newsyslog that the 'logfilename' is a pattern and it should rotate all log files matching the pattern.
#   'J' under 'flags' specifies that rotated logs should be compressed using bzip2.