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Re: CVS branching problem

From: Debnath Mukherjee
Subject: Re: CVS branching problem
Date: Wed, 14 Nov 2007 04:23:51 -0800 (PST)


Thanks very much for your response. I have spent
quite some time over it, thinking there would
be some command option that would not require
to create a 0th version manually, and would
allow branching directly from branch1.

That, apparently, is not the case.

--- Michael Haggerty <address@hidden> wrote:

> Debnath Mukherjee wrote:
> > I need to have a branch "branch1" off the trunk.
> > And then there needs to be a branch "sub-branch1"
> > off the "branch1" branch.
> > 
> > However, I have run into a problem : In order to create
> > a version on the "sub-branch1" branch, you need a version
> > on the "branch1" branch. Thus the version on the main (trunk)
> > branch has to be copied to create a duplicate version
> > on the "branch1" branch and then that version can be branched
> > off to the "sub-branch1" branch.
> > 
> > Whenever I create the branch "sub-branch1" off branch1, (without
> > first creating a version on the branch1 branch), the branch
> > "sub-branch1" is created off the trunk, as shown by the graph
> > command.
> > 
> > I have not yet found a way around this - also I do not
> > know if CVS requires it - this is just what I found
> > from experimenting with CVS.
> > 
> > If you know a way around this copying, please let me know
> > the commands.
> This is a well-known CVS limitation, and the source of endless
> headaches
> for cvs2svn :-)  CVS doesn't record the parents of branches
> unambiguously in the case that you described.
> Normally it is not much of a practical problem, because (if you
> haven't
> committed any changes on "branch1") the contents of the trunk
> revision,
> the 0th revision on branch1, and the 0th revision on sub-branch1 are
> identical.
> If I were you I wouldn't bother with the extra copies, because at the
> level of information that CVS stores, it is not really helpful.  (For
> example, CVS also doesn't record *when* or *by whom* a branch was
> created.)  If, on the other hand, you are really interested in
> keeping
> records about exactly when and from where branches are created, then
> you
> should consider one of the modern SCM alternatives to CVS.
> Michael

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