cvs update vs. git pull

4 messages, 4 authors, 2016-06-15 · open the first message on its own page

cvs update vs. git pull

From: René Moser <hidden>
Date: 2016-06-15 22:48:52

Hi

I use git since a while for my own projects (how surprise).

The company I work for still uses a CVS(nt), and this sucks, time to
changed that. We have a use case we often have problems with. If git would
solve this problem, I would really have a good arg for the managers.

The codebase managed by CVS is quite huge and therefore we have daily and
nightly builds.

One problem we have is, that if there is a commit to cvs while the cvs
update of the build job is running (and this takes 20 minutes), then we
get some inconsistence, the build will fail.

So the question is, if we would use git, this inconsistence would not be
possible because the git pull will get the state of the sha1. Right?

Thanks in advance for your clearification.

Regards
René

Re: cvs update vs. git pull

From: Andreas Ericsson <hidden>
Date: 2016-06-15 22:48:52

On 05/28/2010 11:21 AM, René Moser wrote:
Hi

I use git since a while for my own projects (how surprise).

The company I work for still uses a CVS(nt), and this sucks, time to
changed that. We have a use case we often have problems with. If git would
solve this problem, I would really have a good arg for the managers.

The codebase managed by CVS is quite huge and therefore we have daily and
nightly builds.

One problem we have is, that if there is a commit to cvs while the cvs
update of the build job is running (and this takes 20 minutes), then we
get some inconsistence, the build will fail.

So the question is, if we would use git, this inconsistence would not be
possible because the git pull will get the state of the sha1. Right?
Right.

-- 
Andreas Ericsson                   andreas.ericsson@op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

Considering the successes of the wars on alcohol, poverty, drugs and
terror, I think we should give some serious thought to declaring war
on peace.

Re: cvs update vs. git pull

From: Tor Arntsen <hidden>
Date: 2016-06-15 22:48:52

On Fri, May 28, 2010 at 11:21, René Moser [off-list ref] wrote:
Hi

I use git since a while for my own projects (how surprise).

The company I work for still uses a CVS(nt), and this sucks, time to
changed that. We have a use case we often have problems with. If git would
solve this problem, I would really have a good arg for the managers.

The codebase managed by CVS is quite huge and therefore we have daily and
nightly builds.
So do we, where I work.
One problem we have is, that if there is a commit to cvs while the cvs
update of the build job is running (and this takes 20 minutes), then we
get some inconsistence, the build will fail.
Yes. That's how it works with CVS. We try to work around that problem
by using automatic tags ('nightly'-something) set individually on each
module, common for the whole repo, and then we 'cvs export' by tag
instead of cvs update. This works reasonably well (and is reproducible
due to the tag), but is not anywhere as fast as git would be.
So the question is, if we would use git, this inconsistence would not be
possible because the git pull will get the state of the sha1. Right?
Git commits are atomic, so you won't see that inconsistency problem
with git. So, Right.


-Tor

Re: cvs update vs. git pull

From: Robin Rosenberg <hidden>
Date: 2016-06-15 22:48:52

fredagen den 28 maj 2010 11.21.12 skrev  René Moser:
Hi

I use git since a while for my own projects (how surprise).

The company I work for still uses a CVS(nt), and this sucks, time to
changed that. We have a use case we often have problems with. If git would
solve this problem, I would really have a good arg for the managers.

The codebase managed by CVS is quite huge and therefore we have daily and
nightly builds.

One problem we have is, that if there is a commit to cvs while the cvs
update of the build job is running (and this takes 20 minutes), then we
get some inconsistence, the build will fail.
Perform export/checkout using a timestamp to avoid this. You should also 
require that no checkins to your branch have happend during a period, say 10 
minutes, before starting the build.
So the question is, if we would use git, this inconsistence would not be
possible because the git pull will get the state of the sha1. Right?
Yes. It's hard to predict what happens when you have multiple repos involved, 
in the build. Requiring no changes (on the build branch) in all repos is one
option.

-- robin
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