llvm dev - Feb 2010 - [LLVMdev] About setting up official git & bzr mirrors.

Time ago when the svn server was crawling due to massive hammering from
people mirroring the repo, someone said that after the 2.6 release we
could discuss creating official mirrors for those who work with svn
clients based on distributed VCSs such as git and bazaar.

Such mirrors increase productivity (facilitating experimentation and
parallel tasks, allowing off-line work) and even lessens the workload of
the svn server, as lots of expensive operations (log, annotate,
bisecting, etc) are performed locally.

There is a git mirror that works quite well, but there is no bazaar
mirror and it is impossible to create one due to the measures taken for
preventing svn server abuse.

I'm not going to start a technical discussion (aka flamewar) comparing
git and bzr. I hope it is enough to say that some of us prefer bzr to
git and mostly want to avoid using git on Windows.

So I'm asking to the powers that be some collaboration, either for
mirroring themselves the llvm repos (llvm, clang, maybe gcc too), or for
whitelisting some machine that would hold the master bzr mirror.

-- 
Óscar

On Oct 28, 2009, at 8:30 AM, Óscar Fuentes wrote:
> Time ago when the svn server was crawling due to massive hammering  
> from
> people mirroring the repo, someone said that after the 2.6 release we
> could discuss creating official mirrors for those who work with svn
> clients based on distributed VCSs such as git and bazaar.
>
> Such mirrors increase productivity (facilitating experimentation and
> parallel tasks, allowing off-line work) and even lessens the  
> workload of
> the svn server, as lots of expensive operations (log, annotate,
> bisecting, etc) are performed locally.
>
> There is a git mirror that works quite well, but there is no bazaar
> mirror and it is impossible to create one due to the measures taken  
> for
> preventing svn server abuse.
>
> I'm not going to start a technical discussion (aka flamewar) comparing
> git and bzr. I hope it is enough to say that some of us prefer bzr to
> git and mostly want to avoid using git on Windows.
>
> So I'm asking to the powers that be some collaboration, either for
> mirroring themselves the llvm repos (llvm, clang, maybe gcc too), or  
> for
> whitelisting some machine that would hold the master bzr mirror.
>
We have new LLVM server that is being set up (delayed because I was  
working on 2.6). I'd like to postpone this discussion until that is  
finished (which I don't have an ETA, but hopefully over the next few  
weeks).

Thanks,
Tanya

Due to a current need to have a git mirror for LLVM, I'm resurrecting this
old thread.

I'm aware that there exist already LLVM git mirrors at
git://repo.or.cz/llvm.git and git://github.com/earl/llvm-mirror.git  However,
these repositories only mirror the current SVN trunk and do no provide any
branch and tag information, which would be very convenient for creating
experimental branches that arise from a particular LLVM release. Also, the
collaborative features of repositories like github would allow to easily share
changes.

As Oscar mentioned in his post, it no longer possible for ordinary users to
create such a mirror via git-svn, due to the measures take for protecting the
SVN server from these kind of actions (probably through mod_dontdothat).

Is there any plans to provide an official git mirror for LLVM which does not
only track the SVN trunk but provides also the branch and tag  information from
SVN.

It's probably not very useful to have the whole SVN history since revision
1, for my purposes, having the history from LLVM 2.5 onwards would be
sufficient.

Regards,
 Christian

On 28.10.2009, at 18:43, Tanya Lattner wrote:
> On Oct 28, 2009, at 8:30 AM, Óscar Fuentes wrote:
> 
>> Time ago when the svn server was crawling due to massive hammering  
>> from
>> people mirroring the repo, someone said that after the 2.6 release we
>> could discuss creating official mirrors for those who work with svn
>> clients based on distributed VCSs such as git and bazaar.
>> 
>> Such mirrors increase productivity (facilitating experimentation and
>> parallel tasks, allowing off-line work) and even lessens the  
>> workload of
>> the svn server, as lots of expensive operations (log, annotate,
>> bisecting, etc) are performed locally.
>> 
>> There is a git mirror that works quite well, but there is no bazaar
>> mirror and it is impossible to create one due to the measures taken  
>> for
>> preventing svn server abuse.
>> 
>> I'm not going to start a technical discussion (aka flamewar)
comparing
>> git and bzr. I hope it is enough to say that some of us prefer bzr to
>> git and mostly want to avoid using git on Windows.
>> 
>> So I'm asking to the powers that be some collaboration, either for
>> mirroring themselves the llvm repos (llvm, clang, maybe gcc too), or  
>> for
>> whitelisting some machine that would hold the master bzr mirror.
>> 
> 
> We have new LLVM server that is being set up (delayed because I was  
> working on 2.6). I'd like to postpone this discussion until that is  
> finished (which I don't have an ETA, but hopefully over the next few  
> weeks).
> 
> Thanks,
> Tanya

Launchpad already maintains bzr mirrors:
http://code.launchpad.net/llvm

The mirrors are the lp:~vcs-import branches (a specific launchpad user used
for automatically mirroring branches).

Baptiste.

2009/10/28 Óscar Fuentes <ofv at wanadoo.es>
> Time ago when the svn server was crawling due to massive hammering from
> people mirroring the repo, someone said that after the 2.6 release we
> could discuss creating official mirrors for those who work with svn
> clients based on distributed VCSs such as git and bazaar.
>
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Baptiste Lepilleur <baptiste.lepilleur at gmail.com> writes:
> Launchpad already maintains bzr mirrors:
> http://code.launchpad.net/llvm
>
> The mirrors are the lp:~vcs-import branches (a specific launchpad user used
> for automatically mirroring branches).
Those mirrors are outdated by several months, plus they have a
relatively short part of the history (for LLVM, starts on May 2009)

On 01/28/10 09:49, Christian Plessl wrote:
> Due to a current need to have a git mirror for LLVM, I'm resurrecting
this old thread.
> 
> I'm aware that there exist already LLVM git mirrors at
git://repo.or.cz/llvm.git and git://github.com/earl/llvm-mirror.git  However,
these repositories only mirror the current SVN trunk and do no provide any
branch and tag information, which would be very convenient for creating
experimental branches that arise from a particular LLVM release. Also, the
collaborative features of repositories like github would allow to easily share
changes.
> 
> As Oscar mentioned in his post, it no longer possible for ordinary users to
create such a mirror via git-svn, due to the measures take for protecting the
SVN server from these kind of actions (probably through mod_dontdothat).
> 
> Is there any plans to provide an official git mirror for LLVM which does
not only track the SVN trunk but provides also the branch and tag  information
from SVN.
> 
> It's probably not very useful to have the whole SVN history since
revision 1, for my purposes, having the history from LLVM 2.5 onwards would be
sufficient.
I always had the impression that for git-svn to work the whole history
is required. This is why I use the http://github.com/earl repository for
my git work.

To make work with git effective everybody should have the same base
repository. This is why it does not make a lot of sense to have
different repositories starting at different commits. The advantage of
an official llvm git repository would be that there is a know base
repository for all of us.

Tobi

Hello, Tobias
> To make work with git effective everybody should have the same base
> repository. This is why it does not make a lot of sense to have
> different repositories starting at different commits. The advantage of
> an official llvm git repository would be that there is a know base
> repository for all of us.
Correct. I won't care about adding additional stuff to git mirror (at
repo.or.cz) of llvm repository until the new server for llvm will be
operational.
After that it's planned to have all sorts of interesting stuff like
automatic mirroring, etc.

Unfortunately, I don't have any time information on the hands.

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University