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Re: cvs diff and added files

From: Karl Fogel
Subject: Re: cvs diff and added files
Date: 08 Feb 2001 08:23:49 -0600

Hmmm.  If CVS produced a patch where the `diff', `---', and `+++'
lines gave the path to the filename, would patch then behave the way
you want?  But would this break patches in some other way?

The question is, what is the standard diff format by which patch will
correctly apply changes, and add new files, in subdirs?

I don't know the answer to that, but I presume there is one.


"Derek R. Price" <derek.price@openavenue.com> writes:
> Karl Fogel wrote:
> > "Derek R. Price" <derek.price@openavenue.com> writes:
> > > Is there a good reason that 'cvs diff' (with at least unified format) of
> > > a repository containing added files creates a file that when run through
> > > patch creates the new files at the top level regardless of their
> > > original location?
> >
> > I think maybe the fix is to invoke "patch -p0"?
> Nope.  And in fact, it looks like any file in a subdir is handled
> incorrectly.
> Hmm.  If I use _both_ -p0 and --posix, I can get the patch to apply properly
> to files in subdirs, but then my patch won't create files anymore.
> According to my patch man page, it appears CVS is relying on some POSIX
> behavior which tells patch to read the filename on the 'Index:' line and not
> the later 'diff', '---', and '+++' lines.  Unfortunately, my implementation
> of patch appears to then ignore created files, though from the man page it
> doesn't appear that it is supposed to.
> I can correct the problem by editing the diff CVS creates by hand and
> inserting the proper subdirs in front of filenames on the 'diff', '---', and
> '+++' lines.
>      $patch --version
>      patch 2.5.4
>      Copyright 1984-1988 Larry Wall
>      Copyright 1989-1999 Free Software Foundation, Inc.
>      This program comes with NO WARRANTY, to the extent permitted by
>      law.
>      You may redistribute copies of this program
>      under the terms of the GNU General Public License.
>      For more information about these matters, see the file named
>      COPYING.
>      written by Larry Wall and Paul Eggert
> Derek
> --
> Derek Price                      CVS Solutions Architect ( http://CVSHome.org 
> )
> mailto:dprice@openavenue.com     OpenAvenue ( http://OpenAvenue.com )
> --
> I used to think people were crazy to get tatoos.  Nowadays, I envy
> them that clarity of thought.  There was at least one point in their lives
> when they thought they knew what they were doing.  They could walk into a
> tatoo parlor and say, "I want a big old pig, in red and black, with flames
> shooting out of its nose!  And I want it right there!  That's who I am!"

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