From: Jon Leighton <turnip@...>
Date: 2006-07-27T18:52:18+09:00
Subject: Re: Blocks question

Matthew Smillie wrote:
> On Jul 27, 2006, at 9:46, Jon Leighton wrote:
> 
>> end
>> steps. I
>> don't understand why this happens, can anyone explain my options  
>> please?
> 
> I can't reproduce this on my machine, but it sounds very much like
> it's being caused by buffered output.  This might work:
> 
> def step(msg)
>    print msg + "..."
>    STDOUT.flush
>    yield
>    puts "done"
> end

Thanks, that works a treat. Now, another related question. Part of the 
process involves checking the code out from Subversion. As Subversion 
checks out, it writes lines to STDOUT saying what it is downloading. I 
would like this to be outputted by by script in real time, rather than 
when the whole command has finished running. Currently I am using a 
method like this:

def command(command)
  open("|#{command}", "r") do |f|
    f.each do |line|
      puts line
      STDOUT.flush
    end
  end
end

However, that doesn't seem to work. The output still only comes when the 
command has fully completed. Any ideas of what I can do?

Thanks!

-- 
Posted via http://www.ruby-forum.com/.