Re: Is "show-ref -h" a good test for an empty repository?

Jeff King wrote:

On Fri, Sep 05, 2008 at 08:45:34PM -0400, Eric Gerlach wrote:

quoted

I'm trying to test to see if "git diff --cached" will fail because there  
are no existing commits.  I've come up with running "git show-ref -h -q"  
and testing its return value.  My hypothesis is: If and only if  
git-show-ref succeeds then git-diff will succeed.

Are my logic and assumptions sound?  I'm a bit out of my git comfort zone 
here, so I'd like to get some validation from some people who know  
better.

Maybe "git rev-parse --verify HEAD"?

That seems like it would work too... any reason one would be better than 
the other?

Cheers,

Eric Gerlach