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Re: Pragmatic CVS
Re: Pragmatic CVS
Wed, 26 Mar 2008 13:47:53 -0700 (PDT)
--- Bob Proulx <address@hidden> wrote:
Thanks very much for your reply Bob ...
> Mark Smith wrote:
> > The project is several years old and has not been
> > touched since 2005. On inspection I found many
> > differences between the client sources and the
> > in the production environment, (i.e. several
> > have applied undocumented changes in production
> > without updating CVS!).
> Ah, the legacy corporate environment. How I don't
> miss that! :-)
> > For the client I checked out the latest (mainline)
> > legacy code, applied lots of changes seen in
> > production and re-designed several parts);
> I would probably have committed all of the found
> changes into version
> control before making additional changes. (I think
> you committed
> those changes on a different project line so that is
> okay. But I
> would probably additionally commit the "found
> changes" so that they
> are safely documented too.)
I recorded my findings in new project documentation I
wrote (and checked in to the new project I created);
but I also see your point here.
> > I then used this as a baseline to create a
> completely new client
> > project called 'eclient'.
> Sounds good.
> > To follow the pragmatic guidelines I created a
> > 'eclient_RELB_2_0', so work could continue on the
> > mainline; however, I was the only developer so
> > were no other changes.
> > I was then ready to release so I created a branch
> > 'eclient_RELV_2_0'.
> > So my first question is do you think it was
> correct to
> > do it this way?
> Asking if it is "correct" is not quite the right
> question because
> there isn't one true correct way to do things. But
> what you are
> saying does follow one of the known good best
> practices. It sounds
> like you have done reasonable things.
OK, on reflection that is quite an open question :)
> Many people like to set up these branches at the
> time that they
> release them so that they are prepared for future
> changes. At the
> time they are set up there usually isn't any changes
> there. But by
> preparing them at that time that they know how
> everything is supposed
> to be it is fresh in the mind and everything makes
> sense. Then later
> in the event that they have changes to go in
> everything is set up for
> it and everything is enabled to do those changes
> later. Later when
> the memory may have faded some and won't be quite as
> clear. But
> others would prefer to wait until it is needed and
> then create
> branches as needed later. It is a judgement call.
> I prefer to set
> them up earlier at the time of the release as you
> have done.
> This is a document that you might find useful. Look
> at the section
> "Know when to create branches" for a discussion of
> your question.
> This talks about svn in particular (ignore that) but
> the discussion of
> branching is relevant to any version control system.
> This one is
> short and to the point and why I mention it.
> Here is another more detailed reference specific for
Thanks Bob, I'll have a read tomorrow.
> > In this particular case, the mainline, the branch
> > the release code are all identical.
> That is normal at that moment in time.
> > So my next question is should I do some kind of
> > (from a CVS administrative view) to synchronize
> > release changes into the mainline (even though
> > are no actual changes)?
> No I think you are fine as I understand your
> description. You have
> just now branched and have no commits after the
> branch point. There
> isn't anything to merge until you have changes
> committed on a branch.
OK, at this point all the current work is tagged and
checked in. I can now release anything checked out,
rm rf my work area and go on holiday.
Now back from holiday I want to make two sets of
changes, one to extend the current AIX version and one
to migrate to Linux.
I think the point (that I may be blowing out of
proportion) is what (tag) should I check out for each
set of changes, what kind of tag and/or branch (if
any) should I use when changes are ready to be checked
in; and finally what (if anything) can I or should I
do about merging changes?
> > The result is that I will need two different
> > of some files (not ideal I know), and both
> > will need minor updates in the future.
> > How do you recommend I should proceed?
> I don't have any strong opinions here and so will
> leave that to others
> on the list. I think you will have bigger problems
> setting up the
> build to be cross platform than dealing with the
> version control
I'll have a read of the links you sent about branching
and tagging; I'm not too worried about the builds.
Thanks again for your feedback Bob, much appreciated.
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