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Thu, 1 Nov 2001 10:16:16 -0000
So, is that a yes or a no? '-) Should the effective end result be the same?
I think it should but I've found a situation where it's not and it's doing
my tiny mind in. The patch method works, but up -j -j (ie diff3) tries to
throw a large chunk of code in. I'm moving towards the situation where I do
both and compare the results, which is gross but safer.
The up -j -j merge is GNU diff3 anyway isn't? (with -am -E at least)
Yep, I have context diff on to generate the patch.
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> Then why is it going to a public mailing list and Usenet newsgroup? :)
Cos I don't have any choice in the matter.
Nowt I can do about it unfortunately.
From: address@hidden [mailto:address@hidden
Sent: 31 October 2001 20:08
Subject: Re: diff-iculties
In article <address@hidden>, Andy Baker wrote:
>I might be being more thick than usual today,
>but shouldn't the following two examples
>essentially produce the same result?...
> cvs up -jrev1 -jrev2 file
> cvs diff -rrev1 -rrev2 file >patch
> patch file <patch
The patch program does not handle three-way merging. It tries to patch
the diff hunks into the source text; if it cannot figure out where a
hunk goes, it writes it into a .rej (reject) file. Unlike CVS, patch
doesn't have access to the ancestral version.
However, the CVS merge operation you are doing *is* quite similar to the
actions of the GNU diff3 utility (when that is invoked in a certain way).
Also note that you should make a context diff to maximize the chances
of patch working properly; if the file being patched is different from
the patch base, it needs the context lines to guess where the changes
need to be applied.
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Then why is it going to a public mailing list and Usenet newsgroup? :)
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- RE: diff-iculties,
Andy Baker <=