edward.og@gmail.com
7/14/2005 3:59:00 PM
(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