From: Robert Klemme <shortcutter@...>
Date: 2009-01-08T07:19:48+09:00
Subject: Re: Multiple commands in shell

On 07.01.2009 19:08, dusty wrote:
> On Jan 7, 11:14 am, Gu stav <gus...@vonsydow.tv> wrote:
>> I'm trying to run multiple commands in the shell from ruby but I can't
>> seem to grasp how I keep the "state" from the previous shell command.
>>
>> For example, how would I perform the following sequence of commands in
>> ruby:
>>
>> 1. cd /dir
>> 2. ls
>>
>> Not counting "ls /dir" that is ;)
>>
>> I've tried using:
>>
>> system "cd /dir"
>> system "ls"
>>
>> .but it doesn't work.
>>
>> Thanks!
>> --
>> Posted viahttp://www.ruby-forum.com/.
> 
> 
> [dusty@dustylaptop:~] $ pwd
> /Users/dusty
> [dusty@dustylaptop:~] $ ls tmp/
> test.txt
> 
> irb(main):003:0> system('pwd; cd tmp; ls')
> /Users/dusty
> test.txt
> => true

Here's another way to do it using a here document by having multiple 
commands on separate lines - much the same way as in a shell script:

robert@fussel ~
$ ruby /tmp/x.rb
+ pwd
/cygdrive/c/Dokumente und Einstellungen/robert
+ cd /tmp
+ pwd
/tmp
+ ls
x.rb

robert@fussel ~
$ cat /tmp/x.rb

system <<EOC
set -x
pwd
cd /tmp
pwd
ls
EOC

robert@fussel ~
$

Cheers

	robert

-- 
remember.guy do |as, often| as.you_can - without end