[ros-dev] Microsoft switched to Git

[Alex Ionescu]

I think I'm going to upload two PDF files to prove my point.

On Thu, Feb 16, 2017 at 11:25 PM Hermès BÉLUSCA-MAÏTO <hermes.belusca at sfr.fr>
wrote:

> Hi ! Here are some thoughts as an answer to Ziliang's mail:
>
> > De : Ros-dev [mailto:ros-dev-bounces at reactos.org] De la part de Zachary
> Gorden
> > Envoyé : jeudi 16 février 2017 23:03
> > À : ReactOS Development List
> > Objet : Re: [ros-dev] Microsoft switched to Git
>
> > The fact that git has problems maintain a large history is ONE of the
> limitations that prompted them to develop GVFS. There are several comments
> on the first page in the discussion of the ars technica article on GVFS
> that talk about git's issues with long histories:
> >
> https://arstechnica.com/information-technology/2017/02/microsoft-hosts-the-windows-source-in-a-monstrous-300gb-git-repository/?comments=1
> > I can't link directly to the comments, but if you search by user name
> you jump right to them. Two especially relevant ones are by smengler and
> zaqzlea. The one by zaqzlea is also rather interesting if Linux itself has
> truncated its own commit history, which is more than a bit disturbing from
> > my perspective.
>
> I guess that this 'truncated history' story happened when Linus switched
> to his newly-created Git the 16. April, 2005 :
>
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
> because, if one believes what's written inside
> https://git.wiki.kernel.org/index.php/GraftPoint , "When Linus started
> using git for maintaining his kernel tree there didn't exist any tools to
> convert the old kernel history." Later on, when new features have been
> added to Git, people were able to create Git repositories of Linux' code
> before the 16/04/2005 Git transition, and then, to be able to see the whole
> Linux history, you need to use the so-called graft points. Examples are
> given here:
>
> http://stackoverflow.com/questions/3264283/linux-kernel-historical-git-repository-with-full-history
> https://archive.org/details/git-history-of-linux
>
>
> > We also see a few remarks by a guy calling himself scuttle22 who claims
> that truncating history and dropping it is "common practice" and
> acceptable. His original posts have all been downvoted to oblivion,
> presumably because others take a less lackadaisical perspective
> > on preserving history for purposes of documentation and accountability.
>
> This is possibly "common practice", maybe in order to reduce the git
> repos... In there:
> http://stackoverflow.com/questions/4515580/how-do-i-remove-the-old-history-from-a-git-repository
> , someone ask for example how to trim the history before a certain date,
> while the complete copy of history is kept in an archive repository....
>
>
> I also take the occasion to mention the peculiar possibility, with Git, to
> have a repository having multiple roots ("initial commits"): for example,
> someone did the error once in the linux kernel repo:
> http://lkml.iu.edu/hypermail/linux/kernel/1603.2/01926.html .
>
> Best,
> Hermès
>
>
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-- 
Best regards,
Alex Ionescu
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