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Re: rdiff

From: Paul Edwards
Subject: Re: rdiff
Date: Fri, 23 May 2003 12:07:16 GMT

"Derek Robert Price" <derek@ximbiot.com> wrote in message 
> >The other advantage rdiff has is that if two releases have
> >different version numbers, but that is just a historical anomaly,
> >there are no actual code changes, rdiff will not report any
> >difference, while diff will show an "empty" change (which
> >is usually of no interest to anyone).
> I've never verified the empty change behavior, but perhaps diff
> shouldn't be displaying empty changes either.
> Regardless, I don't have time to do all this myself.  :)
> Patches gratefully accepted!  Test cases and new issues welcome as well.

The following diff on cvs1-11-5 rectifies the problem for
at least one variation of the diff command.

If you go cvs diff -r xxx file.c

then it will be quiet if there are no real changes.  But still produce
diffs if there are real changes.

This doesn't fix the problem for cvs diff -r xxx -r yyy file.c though.

And I didn't try it with plain "cvs diff file.c".

Any ideas on where to fix it for the -r xxx -r yyy variation?

Thanks.  Paul.

Index: diff.c
RCS file: /cvs/ccvs/src/diff.c,v
retrieving revision 1.93
diff -r1.93 diff.c
<  else
<      return DIFF_DIFFERENT;
>  /*else
>      return DIFF_DIFFERENT;*/

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