Re: How we use Git

Hi,

On Fri, Oct 31, 2014 at 7:29 PM, Mark Côté <[email protected]> wrote:
>
> On 2014-10-31 7:26 AM, Gervase Markham wrote:
> > A quick quiz:
> >
> > Q1: What git commands would I use to obtain an exact copy of 4.4.6 from
> > our git repo?
> >
> > Q2: Same question for 4.4.4.

> Regarding Randall's message, we could branch for every release; indeed,
> given git's very light-weight approach to branches, there are many
> strategies for developing under git.  However, given our relatively
> small change volume, I don't think it's worth the extra overhead, at the
> moment at least.

I don't think there would be any additional benefit for having
branches over tags for releases. I think tags are actually beneficial
since they are *fixed* i.e. they can not change over time (as with a
release, which you create at one given day and then it's out of the
door, as with the 4.4.4 release) whereas the branch has the
possibility of future releases: you might want to check out the branch
of 4.4 to work on it to create 4.4.7 one day. And if you want to go
back to 4.4.4 or 3.2.whatever then you can still check out the tag,
create a branch from that point with your patch, or perform your test,
and it would work.

Git also has the notion of signed tags so you can cryptographically
guarantee a tag is exact *this* version of the project, and the source
has not been messed with. Although I think I don't know many projects
that actually use this feature. Usually a sha1 of a tarbal is deemed
enough.

If you have a reasonably new git (1.8) you can even clone a repo at a
given tag. So your question above would be answered with:

git clone --branch bugzilla-4.4.6 http://git.mozilla.org/bugzilla/bugzilla

BTW the answer of your initial question is also mentioned on this
page: https://wiki.mozilla.org/Bugzilla:Git#Getting_A_Specific_Release

--
Mike
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