Re: [PATCH 1/4] config: add include directive

[Jeff King <peff@peff.net>]

On Thu, Jan 26, 2012 at 10:16:22AM +0100, Johannes Sixt wrote:

> > +test_expect_success 'recursive relative paths' '
> > +	mkdir subdir &&
> > +	echo "[test]three = 3" >subdir/three &&
> > +	echo "[include]path = three" >subdir/two &&
> > +	echo "[include]path = subdir/two" >base &&
> > +	echo 3 >expect &&
> > +	git config -f base test.three >actual &&
> > +	test_cmp expect actual
> > +'
> 
> Isn't it rather "chained relative paths"? Recursive would be if I write
> 
>   [include]path = .gitconfig
> 
> in my ~/.gitconfig. What happens in this case?

Good point. I used "recursive" because it is recursing in the include
function within git, but obviously from the user's perspective, it is
not a recursion.

And no, I didn't do any cycle detection. We could either do:

  1. Record some canonical name for each source we look at (probably
     realpath() for files, and the sha1 for refs), and don't descend
     into already-seen sources.

  2. Simply provide a maximum depth, and don't include beyond it.

The latter is much simpler to implement, but I think the former is a
little nicer for the user.

-Peff