Thanks for the help everyone. I used awk as the gem.list file may
contain version number in brackets - "rake (1.2)". I should have
mentioned this before. I used 'awk $1' to get first column from each
row. I liked all inputs, but I think I will try mark's awk solution
here. Thanks again..
On Tue, May 17, 2011 at 8:30 AM, <m.roth@xxxxxxxxx> wrote:
> Andy Holt wrote:
>>> [mailto:centos-bounces@xxxxxxxxxx] On Behalf Of neubyr
>>>
>>> How do I pass xargs input one line at a time to subsequent command?
>>> For example I want to install rubygems by reading a text file as shown
>>> below, however the arguments are getting passed all at once to the
>>> 'gem install' command. I hace tried -L (max-lines) and -n (max args)
>>> options, but it didn't work. What's missing here?? Any help?
>>>
>>> $ cat gem.list.1
>>> mkrf
>>> rake
>>> xmlparser
>>>
>>> $ awk '{ print $0 }' gem.list.1 | xargs -L 1 -0 -I name sudo
>>> gem install name
>>> ERROR: could not find gem mkrf
>>> rake
>>> xmlparser
>>> locally or in a repository
> <snip>
> Screw xargs. Read an awk tutorial, maybe. Learn your tools.
>
> awk '{name = $1; cmd = "sudo gem install " name; system( cmd);}' gem.list.1.
>
> mark "yes, I do do awk..."
>
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