Re: Creating something like increasing revision numbers

From: David Aguilar <davvid@gmail.com>
Date: Oct 21, 2009, 07:47 UTC
Message-ID: <20091021074711.GB67773@gmail.com>
In-Reply-To: <20091019004447.GC11739@gamma.logic.tuwien.ac.at>

On Mon, Oct 19, 2009 at 02:44:47AM +0200, Norbert Preining wrote:

Show 18 quoted lines

> Hi all,
> 
> thanks everyone for the nice feedback!
> 
> On So, 18 Okt 2009, Daniel Barkalow wrote:
> > It's possible as long as you don't think of the "version number" as a 
> > property of the commit, but rather a property that some commits get by 
> > virtue of having been at some time the commit that's what would be found 
> > on that particular server at that particular time. Even though the history 
> 
> Right! That is a good point. In fact I don't care about (local) commits,
> but about the pushes to the central server.
> 
> > of the *content* is non-linear, the sequence of values stored in 
> > refs/heads/master on your central server is linear, local, and easy to 
> > enumerate.
> 
> That is exactely what I need.

If you have any control over how people will use git, then you can give your constantly-incrementing revision number more stability by ensuring that everyone uses 'git pull --rebase'.

That'll literally keep the history completely linear. If someone forgets then it's not a big deal; you'll just get a merge commit and the number will increment by 2 instead of by 1.

> Now my follow-up questions:
> - how would one access this "sequence" number on the server

If you've done the "tag the initial commit" as suggested elsewhere on this thread:

	git tag projectname $(git rev-list HEAD | tail -n1)

then you can do this with simply:

	git describe --tags

It should output something like:

	projectname-101-g20912df

> - is there a way to determine at which of this "sequence" numbers a specific
>   file has been changed last?

	commit=$(git log --pretty=%H -1 -- <filename>)
	git describe --tags $commit

> JAIST Japan Advanced Institute of Science and Technology   preining@jaist.ac.jp
> Vienna University of Technology                               preining@logic.at
> Debian Developer (Debian TeX Task Force)                    preining@debian.org

Just another happy Debian user here,

-- 
		David