From: "edward.og@..." <edward.og@...>
Date: 2005-07-15T01:00:52+09:00
Subject: GetoptLong#.quiet not doing what expected

(Writing this message for the second time - curse browsers for not
saving the
contents of input fields like these...)

I'm a very beginner Ruby user.  It's a pretty, poetic language.  I'm
using it
to write a Nagios plugin.

I took the synopsis that comes in the GetoptLong documentation, and
turned on
the quiet flag.

################################################################################

require 'getoptlong'


# specify the options we accept and initialize
# the option parser

opts.quiet = true

opts = GetoptLong.new(
  [ "--size",    "-s",            GetoptLong::REQUIRED_ARGUMENT ],
  [ "--verbose", "-v",            GetoptLong::NO_ARGUMENT ],
  [ "--query",   "-q",            GetoptLong::NO_ARGUMENT ],
  [ "--check",   "--valid", "-c", GetoptLong::NO_ARGUMENT ]
)


# process the parsed options


opts.each do |opt, arg|
  puts "Option: #{opt}, arg #{arg.inspect}"
end


puts "Remaining args: #{ARGV.join(', ')}"
################################################################################

The documentation says that the quiet flag makes the opt.each (in this
case)
stop when it reaches an invalid flag because GetoptLong#.get will have
passed
nil to the opts.each loop on reaching an invalid flag.

I tried this:
$ ruby getoptslongExample.rb -not -a -real -option
getoptslongExample.rb: invalid option -- n
/usr/lib/ruby/1.8/getoptlong.rb:265:in `set_error': invalid option -- n
(GetoptLong::InvalidOption)        from
/usr/lib/ruby/1.8/getoptlong.rb:434:in `get_option'
        from /usr/lib/ruby/1.8/getoptlong.rb:458:in `each'
        from /usr/lib/ruby/1.8/getoptlong.rb:457:in `loop'
        from /usr/lib/ruby/1.8/getoptlong.rb:457:in `each'
        from getoptslongExample.rb:25

This doesn't look very quiet.

I've caught the raised error with the following code:

################################################################################

#snip#

# process the parsed options

begin
	opts.each do |opt, arg|
		puts "Option: #{opt}, arg #{arg.inspect}"
	end
rescue
  	print "Chill, it's ok.\n"
  	exit
end

################################################################################

This works nicely, but I think I'd rather have the quiet version that I
expected.  Actually, what I really like to have is a version that could
tell
the user that *badOption* is invalid.

How would I implement this, and why is the quiet option not doing
anything?

Thanks very much,
Edward Ocampo-Gooding