In Ruby can one put the File and Line Number into the Logger.formatter?

Question

I want an output format like:

/some/path/to/the/source/file(999) : the message to be logged

Answer 1

This solution is dependent on the internal Logger call chain structure. So it would be nice for this to be suported by the Logger itself so it will be less brittle.

require 'logger'

...

module MyModule

@@_logger_ = Logger.new(STDOUT);

def self.log
    @@_logger_
end

def log
    @@_logger_
end

@@_logger_.formatter = proc do |severity, datetime, progname, msg|
    fileLine = "";
    caller.each do |clr|
        unless(/\/logger.rb:/ =~ clr)
            fileLine = clr;
            break;
        end
    end
    fileLine = fileLine.split(':in `',2)[0];
    fileLine.sub!(/:(\d)/, '(\1');
    "#{fileLine}) : #{msg}\n"
end