Log file lines should be prefixed with log level, timestamp, process id and an easy-to-grep "end of prefix" marker. This subclass of Logger::Formatter does those things.
It also ensures that every line in the log is prefixed, even if the log messages themselves have newlines in them.
- install gem
gem install prefixed-log-formatter
# from within irb
require 'rubygems'
require 'prefixed-log-formatter'
logger = Logger.new($stdout)
logger.formatter = PrefixedLogFormatter::Formatter.new
logger.debug 'hi'# add to your Gemfile
gem "prefixed-log-formatter"
# in config/application.rb
config.logger = Logger.new(config.paths.log.first)
config.log_level = Rails.env.production? ? Logger::INFO : Logger::DEBUG
config.logger.formatter = PrefixedLogFormatter::Formatter.new
# in your app
Rails.logger.debug 'debug'
Rails.logger.info 'info'
# etc...The default is ':::'
logger = Logger.new($stdout)
logger.formatter = PrefixedLogFormatter::Formatter.new
logger.formatter.prefix_separator = '--'
logger.debug 'hi'
# result:
# D 2012-03-05 15:18:58 28986 -- hi