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//opt/alt/ruby31/share/ruby/logger/formatter.rb
# frozen_string_literal: true class Logger # Default formatter for log messages. class Formatter Format = "%s, [%s #%d] %5s -- %s: %s\n" DatetimeFormat = "%Y-%m-%dT%H:%M:%S.%6N" attr_accessor :datetime_format def initialize @datetime_format = nil end def call(severity, time, progname, msg) Format % [severity[0..0], format_datetime(time), Process.pid, severity, progname, msg2str(msg)] end private def format_datetime(time) time.strftime(@datetime_format || DatetimeFormat) end def msg2str(msg) case msg when ::String msg when ::Exception "#{ msg.message } (#{ msg.class })\n#{ msg.backtrace.join("\n") if msg.backtrace }" else msg.inspect end end end end
