From: nobu.nokada@...
Date: 2003-01-21T01:55:47+09:00
Subject: Re: 2 optparse questions

Hi,

At Mon, 20 Jan 2003 23:34:00 +0900,
Han Holl wrote:
> Optparse is a quite powerful tool, but there are some issues:

Thank you.

> 1. It seems not to allow the '-d directory' style of option values.
>   This is really bad. In the unix world this is almost standard.
>   Also the Posix recommandation says explicitly that both '-d directroy'
>   and '-ddirectory' should be accepted.

Well, I might misunderstand you?

$ ruby -roptparse -e 'ARGV.options{|opt|opt.def_option("-dDIR"){|d|@dir=d};opt.parse!};p self' -- -dhere
#<Object:0x401938e4 @dir="here">

$ ruby -roptparse -e 'ARGV.options{|opt|opt.def_option("-dDIR"){|d|@dir=d};opt.parse!};p self' -- -d here
#<Object:0x401938e4 @dir="here">

> 2. If you use the recommended form:
> ARGV.options do |opts|
> ....
>   opts.parse!
> end
> then optparse stops command line processing, but continues with
> the script. This is also quite wrong. It should _not_ catch the exception
> (I can do that myself if I want to). Default beheviour for erroneous
> options should be exception. The programmer can put a Usage in the
> rescue.

parse! outside ARGV.options block.

$ ruby -roptparse -e 'ARGV.options{|opt|opt.def_option("-dDIR"){|d|@dir=d}; opt}.parse!;p self' -- -d there
#<Object:0x401938e4 @dir="there">

$ ruby -roptparse -e 'ARGV.options{|opt|opt.def_option("-dDIR"){|d|@dir=d}; opt}.parse!;p self' -- -x
/usr/lib/ruby/1.8/optparse.rb:1118:in `order!': invalid option: -x (OptionParser::InvalidOption)
        from /usr/lib/ruby/1.8/optparse.rb:1082:in `catch'
        from /usr/lib/ruby/1.8/optparse.rb:1082:in `order!'
        from /usr/lib/ruby/1.8/optparse.rb:1161:in `permute!'
        from /usr/lib/ruby/1.8/optparse.rb:1187:in `parse!'
        from -e:1

-- 
Nobu Nakada