Re: [PATCH v1 0/3] Introduce config variable "diff.primer"

On Mon, Jan 26, 2009 at 05:47:54PM -0800, Keith Cascio wrote:

quoted

  2. It is unset. The rationale is that you are using the "c" diff
     driver, and it has left the value unset. The default then means "if
     you have no diff driver setup".

I'm in favor of option (2), because [diff] a.k.a [diff ""] serving as

Nit: [diff] and [diff ""] are different. The "dotted" notation which we
use in the code and which git-config respects for a variable "foo" in
each section would look like "diff.foo" and "diff..foo", respectively.

the fallback for [diff *] feels like a special case.  If a full system
of precedence 

Yes, I think having a "this is the default driver whose driver-specific
options are used if you don't have a different driver" is semantically
simple and clear.

and fallbacks is desired for .git/config, we should adopt explicit
grammar that lets me define an arbitrary precedence tree over all
sections.  Once a powerful concept is born, somewhere down the road,
some user will desire its universalization.

OK, now you're scaring me. :) I'm not sure I want to see the grammar you
would use to define an arbitrary precedence tree, or whether such
complexity has any real-world use in git config. I think you would have
to show a concrete example to prove the utility of something like that.

-Peff