On 24-Apr-09, at 4:24 AM, Raphaël Piéroni wrote:

Hi folks,

Thinking of distributed SCM, why choosing GIT over Mercurial or over Bazaar
?


For one of the biggest reasons is that there is an extremely good implementation in Java. The other proof point is that this is successfully being used by Google's Android team so this technology is going to get some love. GIT is also become far more adopted then the other DSCMs and the proof of use are organizations like GitHub cropping up. I think it is actually pretty easy to choose.

They use GIT: http://git-scm.com/ (linux kernel)
They use Mercurial:
http://www.selenic.com/mercurial/wiki/index.cgi/ProjectsUsingMercurial(openJDK)
They use Bazaar: http://bazaar-vcs.org/WhoUsesBzr (MySQL)

Not easy to choose ;-)

Regards.

Raphaël

2009/4/24 Jason van Zyl <jvan...@sonatype.com>

Here is a more complete summary of why I think GIT, and more specifically
JGIT is the best thing going for the SCM:

http://www.sonatype.com/people/2009/04/git-the-sweetest-scm-around/

On 23-Apr-09, at 10:00 AM, Jason van Zyl wrote:

Hi,

Maven was the first project at Apache to use JIRA and though there was a great deal of concern/noise about using JIRA it ultimately proved to be a
decent system and now lots of projects are using JIRA.

I'm not particularly interested in mandating everything in Maven to use GIT but I would like to pilot the use of GIT as the canonical repository for
Maven 3.x and wanted to see what others thought.

I believe that GIT is going to be the dominant SCM in the very near future because the distributed nature is so much more inline with the way OSS should work. Anyone can get a complete copy of our work and it is much easier to absorb those changes. There are many examples now on the net demonstrating projects that have switched to GIT and their communities have
flourished as a result.

We are also seeing the rise of Java implementations of GIT and to me this means there are going to be an order of magnitude more developers able to work on the core system. JGIT, which is being developed primarily by Shawn Pearce @ Google, is awesome. I actually have been participating in helping with the build for JGIT and I've been working with Peter Royal to create a MINA SSHD wrapper around JGIT using JSecurity for authentication and it's so easy. Peter cranked out a working prototype in 3 hours. This simply is not possible with C-based systems like Subversion which is essentially a closed box or generally uninteresting to Java developers. JGIT along with Gerrit (an awesome code review tool Shawn Pearce is working on) is being used by the Google Android team and it's working well (I'm meeting with Shawn Pearce
today to chat) so I think we have evidence this works.

I'd be happy if everyone here wanted to use GIT but I do believe that I have a better chance of getting people involved with Maven 3.x if I can get
the canonical repository in GIT.

In the Maven project we set precedent with JIRA and now I would like to do
that with GIT.

If Apache Infrastructure doesn't want to support this then I feel we can do the same thing we did with JIRA until they catch up. I think having a canonical repository at Github is safe, well backed up and maintained and I don't think we would have to worry about anything there. They have full-time staff and a slew of engineers so I would even argue that a repository at Github would be just as safe and well maintained as a Subversion repository
here.

Any thoughts?

Thanks,

Jason

----------------------------------------------------------
Jason van Zyl
Founder,  Apache Maven
http://twitter.com/jvanzyl
----------------------------------------------------------

In short, man creates for himself a new religion of a rational
and technical order to justify his work and to be justified in it.

-- Jacques Ellul, The Technological Society


Thanks,

Jason

----------------------------------------------------------
Jason van Zyl
Founder,  Apache Maven
http://twitter.com/jvanzyl
----------------------------------------------------------

the course of true love never did run smooth ...

-- Shakespeare


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Thanks,

Jason

----------------------------------------------------------
Jason van Zyl
Founder,  Apache Maven
http://twitter.com/jvanzyl
http://twitter.com/SonatypeNexus
http://twitter.com/SonatypeM2E
----------------------------------------------------------

happiness is like a butterfly: the more you chase it, the more it will
elude you, but if you turn your attention to other things, it will come
and sit softly on your shoulder ...

 -- Thoreau


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