From: Gyoung-Yoon Noh <nohmad@...>
Date: 2005-10-28T05:48:43+09:00
Subject: Re: Ruby readline - completion based on already-entered commands

Hi,

$ cat rlcomp.rb
require "readline"

nominee = %w[foo bar baz quit]
Readline.completion_proc =
  lambda { |s| nominee.find_all { |e| e.match(s) } }

begin
  line = Readline.readline("prompt> ")
  puts line
end until line =~ /quit/

$ ruby rlcomp.rb
prompt> ba
bar baz


HTH.

On 10/28/05, Matt Wilkins <mcw@cs.ubc.ca> wrote:
>
> hi,
>
> i'm new to ruby, and having the problem Bill Atkins was having with
> the readline library.  i searched the archives and found this thread.
> unfortunately no great solution.  there was the partial solution from
> Dave Baldwin that involved changing the word split character.  as he
> pointed out the real problem is that ruby readline doesn't provide the
> whole line buffer so one cannot do context line completion.
>
> i'm wondering on the follow up process.  there is a patch to fix this
> at:
>
>    http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/54796
>
> it was posted back in nov 2002.  but hasn't made it in so far (checked
> 1.8.3), but has been a problem for 3 or 4 years.  was the patch no
> good?
>
> thanks for any insight
>
> matt
>
> On 11 Aug 2005, at 15:44, Bill Atkins wrote:
> > How can I use the builtin readline library to complete arguments to
> > commands?  I have basic completion working now, so that
> >
> > %wmi > st [TAB]
> >
> > will show valid commands starting with "st" (in this case "start"
> > and "stop"), but how do I complete arguments specific to that
> > command?
> >
> > For instance, if the user has already typed "start Te" and then hits
> > TAB, it should show completions specific to the start command (in
> > this case "TestDevice" and "TerminalServer"), but I'm not clear on
> > how to do this.
> >
> > --
> > Bill Atkins
> >
> >
>
>


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