linux-kernel - Re: [PATCH RFC] kconfig: place git SHA1 in .config output if in git tree

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Message-ID: <20100301164800.GC6758@linux.vnet.ibm.com>
Date:	Mon, 1 Mar 2010 08:48:00 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, zippel@...ux-m68k.org, mingo@...e.hu,
	akpm@...ux-foundation.org
Subject: Re: [PATCH RFC] kconfig: place git SHA1 in .config output if in
	git tree

On Mon, Mar 01, 2010 at 08:22:15AM -0800, Linus Torvalds wrote:
> 
> 
> On Sun, 28 Feb 2010, Paul E. McKenney wrote:
> >
> > Uses "git log" to print the hash.
> 
> Please don't use "git log" for something like this.
> 
> Sure, it works, but it's kind of silly to say "I want a log, except I want 
> only a single entry, and btw, I don't actually even want the log entry for 
> that single entry at all, just the hash".
> 
> It boils down to "I want a log, except with none of the log part". It 
> should make you go "Do I really want a log"?
> 
> If you really want the hash, maybe just using "git rev-parse HEAD" would 
> do it.
> 
> However, in this case I think _any_ of those would be wrong. Wouldn't it 
> make sense to use the same thing that we already compute for 'uname' 
> (scripts/setlocalversion)? Especially as that one already knows how to 
> handle other SCM's too (ie the whole hg/svn parts).
> 
> That script also ends up using a nicer format, ie it uses "git describe" 
> to give a better idea of where it all is.

Agreed!  The "-dirty" modifier for the case of changes not yet
checked into git looks especially helpful.  Geert Uytterhoeven already
straightened me out on this one, and I posted an updated patch that
uses scripts/setlocalversion (as a reply to his email).

Still learning about git, and I suspect that I always will be in that
state.  ;-)

							Thanx, Paul
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