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

[Jeff King <peff@peff.net>]

On Thu, Jan 26, 2012 at 05:25:32PM -0500, Jeff King wrote:

> There's a slight complication with when to clear the "I have seen this"
> mark for each source. If you are interested only in breaking cycles,
> then obviously you can just clear the marks as you pop the stack. But if
> you want to stop repeated inclusion down different branches of the
> include tree, you need to keep the marks until you're done (e.g., the
> same file referenced by .git/config and ~/.gitconfig). But you do still
> need to clear them, because we repeatedly call git_config with different
> callback functions, and we need to re-parse each time.
> 
> I think it should be sufficient to make the marks live through
> git_config(), and get cleared after that (so all of .git/config,
> ~/.gitconfig, and /etc/gitconfig will only load a given include once,
> but another call to git_config will load it again).

Ugh, actually it's a little trickier. Because a git_config callback can
call git_config again, we want one set of marks per git_config
invocation, but we need to handle two simultaneous invocations. But I
think it's OK. We can stuff the data into the "git_config_include_data",
which has the proper scope.

-Peff