Class: HumorousLogFormatter::LogFormatter

Inherits:
Object
  • Object
show all
Includes:
ActiveSupport::TaggedLogging::Formatter
Defined in:
lib/humorous_log_formatter.rb

Constant Summary collapse

SEVERITY_TO_TAG_MAP = 
{'DEBUG' => 'meh', 'INFO' => 'fyi', 'WARN' => 'hmm', 'ERROR' => 'wtf', 'FATAL' => 'omg', 'UNKNOWN' => '???'}
SEVERITY_TO_COLOR_MAP = 
{'DEBUG' => '0;37', 'INFO' => '32', 'WARN' => '33', 'ERROR' => '31', 'FATAL' => '31', 'UNKNOWN' => '37'}
TIME_FORMAT = 
"%Y-%m-%d %H:%M:%S."
SKIP_TIME =

because heroku already prints the time, override if you use in prod and aren’t on Heroku

!Rails.env.development? # because heroku already prints the time, override if you use in prod and aren't on Heroku
SUPER_TIME_PRECISION = 
3
SUPER_TIME_PRECISION_STOP_INDEX = 
SUPER_TIME_PRECISION - 1
USE_SUPER_TIME = 
SUPER_TIME_PRECISION > 0
USE_HUMOROUS_SEVERITIES = 
begin
  if ENV['LOG_HUMOR']
    ENV['LOG_HUMOR'] != 'false' # Default to true
  else
    Rails.env.development?
  end
end
USE_COLOR = 
begin
  if ENV['LOG_COLOR']
    ENV['LOG_COLOR'] != 'false' # Default to true
  else
    Rails.env.development?
  end
end
THIS_FILE_PATH = 
File.expand_path(".")
FORMATTED_SEVERITY = 
USE_HUMOROUS_SEVERITIES ?
lambda { |severity| sprintf("%-3s", "#{SEVERITY_TO_TAG_MAP[severity]}") } :
lambda { |severity| sprintf("%-5s", "#{severity}") }
FORMATTED_MESSAGE = 
if USE_COLOR
  lambda { |severity, formatted_time, msg|
    color = SEVERITY_TO_COLOR_MAP[severity]
    res = ''
    res << "[\033[#{color}m#{formatted_time}\033[0m] " if formatted_time
    res << "[\033[#{color}m#{FORMATTED_SEVERITY.call(severity)}\033[0m] #{msg.strip}\n"
  }
else
  lambda { |severity, formatted_time, msg|
    res = ''
    res << "[#{formatted_time}]" if formatted_time
    res << "[#{FORMATTED_SEVERITY.call(severity)}] #{msg.strip}\n"
  }
end

Instance Method Summary collapse

Instance Method Details

#call(severity, time, progname, msg) ⇒ Object 



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# File 'lib/humorous_log_formatter.rb', line 76

def call(severity, time, progname, msg)
  if SKIP_TIME
    formatted_time = nil
  else
    formatted_time = time.strftime(TIME_FORMAT)
    formatted_time << time.usec.to_s[0..(SUPER_TIME_PRECISION_STOP_INDEX)].rjust(SUPER_TIME_PRECISION) if USE_SUPER_TIME
  end
  text = if msg.is_a? String
           msg
         elsif msg.is_a? Exception
           "  --> Exception:#{exception_values(msg)}"
         else
           "!!!!! UNKNOWN TYPE: #{msg.class} #{msg.to_s}"
         end
  FORMATTED_MESSAGE.call(severity, formatted_time, text)
end

#colorize_exception(line) ⇒ Object 



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# File 'lib/humorous_log_formatter.rb', line 72

def colorize_exception(line)
  "\033[01;32m#{line}\033[0m"
end

#exception_values(e) ⇒ Object 



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# File 'lib/humorous_log_formatter.rb', line 64

def exception_values(e)
  trace = e.backtrace.select { |x| !line.starts_with?(THIS_FILE_PATH) }
  trace = trace.map { |l| colorize_exception(l) } if USE_COLOR
  first = "\n#{trace.first}: #{e.message} (#{e.class})"
  rest = "\t#{trace[1..-1].join("\n\t")}"
  "#{first}\n#{rest}"
end