[ILUG] Re: sed problem

[Paul Dunne]

Dave Neary writes,

    I was reading the Sed question to the list in the archives (sorry, still 
    not re-subscribed :) and Padraig's answer, which is no good...

    John A. Kinsella wrote:
     > I'd like to do a simple conversion
     > s/Maple 8/Maple 9/g
     > in a bunch of Maple *.mws files using sed.
     >
     > Is there a way to tell sed to do the substitution while preserving the
     > line breaks (which Maple seems to need).

I take the "line breaks" to be possible newlines between "Maple" and "8".
So, unless I mis-understand, surely this is what's required?

#!/bin/sed -f
# simple case
s/Maple 8/Maple 9/g

# line break (with optional spaces)
/Maple *$/{
N
s/Maple *\n8/Maple\
9/
}

(If you have newlines within the word "maple", it's a pain but stil doable
by extending this technique).

-- 
Paul Dunne | paul at dunne.ie.eu.org | http://dunne.yi.org/