[Chicago-talk] replace in place
Andy Lester
andy at petdance.com
Fri Mar 11 12:29:51 PST 2005
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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