Re: How can I tell if a file has been updated upstream?

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On Fri, Feb 5, 2010 at 10:50 AM, Junio C Hamano <gitster@xxxxxxxxx> wrote:

> So whenever I run your script it calls home, spend a roundtrip time, and
> nags me to update?

Yes.  Fortunately, it's all on an internal network, so the overhead is low.

> I don't want to be working with you unless I can go
> without running that script less often than once a week ;-)

That's about how often most people will run the script.

> You need to teach it how to call home.  How do your users "clone"?

git clone git://....

Only I have ssh access to my repository.

> Also how do they run the script?  Directly out of the
> repository work tree, or is there a "make install" step involved?

Directly out of the repository.  It's just a Python script.

> If your users are running from the work tree copy unmodified, then you
> would need to look at sys.argv[0] to find out where it is, use that to
> find the repository, and using its .git/config learn how the user pulls
> from your repository (i.e. git config remote.origin.url), and at the same
> time which version it is (i.e. git rev-parse HEAD).

Ok.

> At runtime, you would run "ls-remote HEAD" and compare with the version
> you are running.  It may be stale, or it may not be.

Ok.

> How big is the script?  It _might_ be faster to distribute a launcher that
> downloads the real script every time it runs and runs that fresh copy that
> is guaranteed to be the latest than doing all the hassle of the above.

I don't want to force an update, and I don't want to have to email
everyone whenever there is an update.   This seems to be the least
intrusive approach.

-- 
Timur Tabi
Linux kernel developer at Freescale
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