Getoptlong question

Ruby
1

This has been bugging me for weeks now, intermittently.

By all accounts I’ve read, this getoptlong code should work

require ‘getoptlong’

opts = GetoptLong.new(
[“–devel”,“-d”,GetoptLong::NO_ARGUMENT],
[“–getpass”,“-g”,GetoptLong::NO_ARGUMENT],
[“–debug”,“-D”,GetoptLong::NO_ARGUMENT],
[“–verbose”,“-V”,GetoptLong::NO_ARGUMENT]
)

server = ‘http://192.168.10.16/’
verbose = false
opts.each { |o,a| p o }
opts.each { |o,a|
case o
when ‘–devel’
server = ‘http://192.168.20.56/’
when ‘–getpass’
puts “this option does nothing”
when ‘–debug’: $DEBUG = true
when ‘–verbose’: verbose = true
end
}
p server
p $DEBUG
p verbose

This is the output I expect when I run it:

“–devel”
“–debug”
“–verbose”
“http://192.168.20.56/”
true
true

This is the output I get:

“–devel”
“–debug”
“–verbose”
“http://192.168.10.16/”
false
false

What am I missing?

2

2006/3/7, Matt R. [email protected]:

                     ["--debug","-D",GetoptLong::NO_ARGUMENT],
             when '--getpass'

“–debug”
“–verbose”
“http://192.168.10.16/”
false
false

What am I missing?

Insert a “p a” in the second opts.each block and see what happens. :slight_smile:

Kind regards

robert

3

On Tue, 7 Mar 2006, Matt R. wrote:

                   ["--debug","-D",GetoptLong::NO_ARGUMENT],
           when '--getpass'

“–debug”
“–verbose”
“http://192.168.10.16/”
false
false

What am I missing?

harp:~ > diff -ubB a.rb.org a.rb
— a.rb.org 2006-03-07 07:56:07.000000000 -0700
+++ a.rb 2006-03-07 07:58:12.000000000 -0700
@@ -9,7 +9,7 @@

server = ‘http://192.168.10.16/’
verbose = false
-opts.each { |o,a| p o }
+#opts.each { |o,a| p o }
opts.each { |o,a|
case o
when ‘–devel’

harp:~ > ruby – a.rb --debug --devel --verbose
“http://192.168.20.56/”
true
true

each is destructive - as most argv parsers are.

hth.

-a

4

On Wed, 8 Mar 2006, [email protected] wrote:

server = ‘http://192.168.10.16/’
true
true

each is destructive - as most argv parsers are.

Oh, fer cryin’ out loud I’m an idiot.

hth.

Certainly did. Thanks.

5

On Wed, 8 Mar 2006, Matt R. wrote:

each is destructive - as most argv parsers are.

Oh, fer cryin’ out loud I’m an idiot.

welcome to the club! :wink:

-a

6

Matt R. [email protected] writes:

What am I missing?

GetoptLong::each as well as GetoptLong::get consume the options. After
the first opts.each{…} your opts are emtpy.

The docs don’t mention that, I think. I also had those troubles when I
used opts.get == nil to check if no options were given.

Perhaps you should have a look at the optparse module in the stdlib.

Regards,
Tassilo