From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Pitre <nico@fluxnic.net>
Subject: Re: How can I tell if a file has been updated upstream?
Date: Fri, 05 Feb 2010 12:39:18 -0500 (EST)
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Cc: "Shawn O. Pearce" <spearce@spearce.org>, git <git@vger.kernel.org>
To: Timur Tabi <timur@freescale.com>
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On Fri, 5 Feb 2010, Timur Tabi wrote:

> So maybe you meant this:
> 
> $ git ls-remote ssh://git.am.freescale.net/git/timur/bin refs/heads/master
> 20fbe12069038057cbd0d66c5a673956f7792c7d	refs/heads/master
> 
> I can use this to compare with the local HEAD.  However, this only
> tells me that the repository as a whole has changed.  I was hoping
> there would be a way to see if just the one file has change.  I.e. how
> can I get the HEAD of a *file* in a remote repository.

You can't.

You must perform a fetch and then use whatever method to compare with 
origin/master:foobar.py which is the file you're looking for.

> Yeah, I'm not keen on performing an actual download, even if it's just a fetch.

Why?  It is not like if a fetch was terribly more costly than any method 
that could get the version of a file on the remote.


Nicolas