[Lazarus] SubVersion vs Git

[Reenen Laurie]

Git has - like several other linux applications - a crappy name.  I dunno if
it is a dirty word, but it sounds like one.

I do not want a whole history of edits if I only want to check-out (svn
terminology) the latest version.

On Wed, Nov 5, 2008 at 11:16 AM, Alexander Klenin <klenin at gmail.com> wrote:

> On Wed, Nov 5, 2008 at 18:02, Florian Klaempfl <florian at freepascal.org>
> wrote:
> > Git is a hype. Git might be nice for projects with >100 developers and
> > which has (like linux) dedicated branch maintainers. Git allows to
> > support complicated project structures with several layers of
> > maintainers and project managers. But this is something smaller projects
> > like FPC or Lazarus don't need.
>
> I disagree. I, for example, have moved all my Unix-based projects to Git,
> even personal ones, and it is much better to work with even in a
> single-developer case.
> In particular, ability to create commits off-line is very valuable to me.
> The only problem of Git is poor Windows support, and as unfortunately some
> of my projects are Windows-specific, I still prefer to use SVN for those.
>
> Windows compatibility is also the reason I would not recommend
> to move Lazarus/FPC from Subversion (yet).
>
> >> * Git repositories are MUCH smaller.
> >
> > Who did tell you this? Linus? Does he have the history of the Linux code
> > since version 0.1 in his repository?
> Since Git is distributed, the notion of "his" repository is rather vague,
> but such a repository definitely exists:
>
> http://git.kernel.org/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=summary
>
>
> >> * Git is local, so checking history or doing commits are really fast.
> >
> > I doubt that a repository containing the full lazarus history is smaller
> > than a repository containing each file twice.
> They are usually of about equal size, for example, svn checkout of
> Pidgin (IM tool) is 122 MB while complete history in Git repository is 148
> MB.
> But the OP's point was that local operations are MUCH faster,
> so much that it changes the work flow. For example, to show a few last
> log messages
> from the lazarus repository takes me 10-20 sec., and showing a diff between
> to revisions of a file -- another 30-60 sec., while in Git these
> operations are instantaneous.
>
> >> * You have lots of backups of Git repositories because they are local
> >> to each developer. In SubVersion, if the repository server is down,
> >> everybody is stuck.
> >
> > Only with committing. With a DVCS you're also stuck if the repository
> > for the "official" code is dead. Great that you can "commit" to your
> > local repository but nobody will see it so what's the point about it?
> With SVN if the central repository is dead, then
> the whole history of the project vanishes with no chance of restoration.
> Of course, the central repository should be backed up, but still if the
> failure
> occurs, it is catastrophic.
> On the contrary, with DVCS (not only Git) such a failure is just a
> minor inconvenience,
> since each developer has a local copy of the history, and can easily
> publish it.
>
> Another compelling feature of Git is the possibility to create and manage
> local branches. For example, when I want to add a feature to Lazarus,
> I would like to present it as a series of clean patches for easier review
> and better log history. However, I can not do this with Subversion in
> a practical way,
> so I have to submit first patch of the series, wait for it to get accepted,
> submit the second one etc.
> This wastes both my and reviewer's time so much that it can take months
> instead of weeks to complete a moderately complex feature.
> Actually, I due to this obstacle have given up trying to develop
> more complex features for Lazarus and just submit small patches for
> trivial things ;-)
>
> >> *  How well is Git supported on other platforms than Linux?
> >
> > Near to unusable, mercurial is much better in this regard
> That I agree with. Perhaps it is time for me to try Mercurial.
>
>
> --
> Alexander S. Klenin
> Insight Experts Ltd.
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> Lazarus at lazarus.freepascal.org
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>



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