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Re: Best method to replace a branch's code
From: |
Derek Robert Price |
Subject: |
Re: Best method to replace a branch's code |
Date: |
Wed, 24 Mar 2004 13:51:39 -0500 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 |
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I was in a hurry when I wrote this earlier. The short version is that
the form of the command I suggested is asking CVS to take the changes
that would be necesary to transform point A into point B and merge them
into point A, which, by definition, then transforms point A into point B.
Derek
Derek Robert Price wrote:
> Larry Jones wrote:
>
> Derek Robert Price writes:
>
> >cvs up -jbranchA -jbranchB -rbranchA project
>
>
> Isn't that just a long way of doing:
>
> cvs up -rbranchA -jbranchB project
>
> That was my first thought, but it still may require a bit of manual
> intervention. For example, that won't delete files that exist on
> branchA that have never existed on branchB and you'll get conflicts for
> files that were independently created on both branches. It is a good
> start, though, and may do the whole job if you're lucky.
>
>
>
> No. The trick to thinking about this is really to visualize only your
> destination and your merge endpoints as three distinct snapshots of a
> project in time and try to ignore the intervening changes, but I will
> draw the branch diagram anyhow. Assume:
>
> --X---Y--------------------------------------
> \ \
> \ \----------branchA-----
> \
> \--------branchB-----
>
> `cvs up -rbranchA -jbranchB' will compute the GCA of branchA & branchB
> (X in the diagram), computes the diff from X to the tip of branchB, then
> merges the result (effectively applying it via the patch program) into
> branchA. This is effectively merging the changes since branchB branched
> into branchA and neglecting to remove any changes made to the trunk
> since branchB branched or to branchA.
>
> `cvs up -rbranchA -jbranchA -jbranchB', computes the diff from the tip
> of branchA to the tip of branchB, then merges the result (again,
> effectively applying it via the patch program) into the tip of branchA,
> effectively recreating branchB.
>
> In other words, imagine:
>
> echo a whole bunch of junk >file
> cp file file2
> echo some other junk >>file2
> diff -u file file2 >mypatch.diff
> patch -p0 <mypatch.diff
>
> Bingo. Since the diff was determine from file -> file2, then the
> resulting patch applied to file, the contents of file now look like file2.
>
> Derek
>
> --
> *8^)
>
> Email: address@hidden
>
> Get CVS support at <http://ximbiot.com>!
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- --
*8^)
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- RE: Best method to replace a branch's code, (continued)
- RE: Best method to replace a branch's code, Fouts Christopher (6452), 2004/03/24
- RE: Best method to replace a branch's code, Fouts Christopher (6452), 2004/03/24
- RE: Best method to replace a branch's code, Euan Guttridge, 2004/03/24
- RE: Best method to replace a branch's code, Euan Guttridge, 2004/03/24
- Re: Best method to replace a branch's code, Derek Robert Price, 2004/03/24
- Re: Best method to replace a branch's code, Larry Jones, 2004/03/24
- Re: Best method to replace a branch's code, Derek Robert Price, 2004/03/24
- Re: Best method to replace a branch's code,
Derek Robert Price <=
- Re: Best method to replace a branch's code, Derek Robert Price, 2004/03/24
- Re: Best method to replace a branch's code, Larry Jones, 2004/03/24
- Strange Characters, Gagneet Singh, 2004/03/25
- Re: Strange Characters, Mark D. Baushke, 2004/03/25
- RE: Strange Characters, Gagneet Singh, 2004/03/25
RE: Best method to replace a branch's code, Fouts Christopher (6452), 2004/03/24
RE: Best method to replace a branch's code, Fouts Christopher (6452), 2004/03/24
RE: Best method to replace a branch's code, Andy Jones, 2004/03/24
RE: Best method to replace a branch's code, Jim.Hyslop, 2004/03/24