[Chicago-talk] replace in place

[JT Smith]

Thank you so much!

On Fri, 11 Mar 2005 14:29:51 -0600
  Andy Lester <andy at petdance.com> wrote:
> On Fri, Mar 11, 2005 at 02:20:20PM -0600, JT Smith (jt at plainblack.com) wrote:
>> I remember having a really great tutorial on doing things in one line from 
>> the command line in perl, but I can't remember how it all worked. Could 
>> somebody help me out? I have a make file that has a line in it I wish to 
>> replace. The line looks like:
> 
> "A Field Guide To The Perl Command-Line Options" at
> http://www.petdance.com/perl/
> 
>> prefix=/usr/local
>> 
>> And I would like it to be
>> 
>> prefix=/data/prereqs
> 
> perl -i -p -e's[/usr/local][/data/prereqs]g' Makefile
> 
> or
> 
> perl -i -p -l -e'$_ = "prefix=/data/prereqs" if $_ eq "prefix=/usr/local"' Makefile
> 
> You can replace
> 
>    Makefile
> 
> with
> 
>    `find . -name Makefile`
> 
> to find all Makefiles in the tree if you like.
> 
> 
> -- 
> Andy Lester => andy at petdance.com => www.petdance.com => AIM:petdance
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JT ~ Plain Black
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http://www.plainblack.com

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