Re: [PATCH] checkout, restore: make pathspec recursive

[Jeff King <peff@peff.net>]

On Sat, Aug 22, 2020 at 10:57:59AM +0200, René Scharfe wrote:

> The pathspec given to git checkout and git restore is used with both
> tree_entry_interesting (via read_tree_recursive) and match_pathspec
> (via ce_path_match).  The latter effectively only supports recursive
> matching regardless of the value of the pathspec flag "recursive",
> which is unset here.
> 
> That causes different match results for pathspecs with wildcards, and
> can lead checkout and restore in no-overlay mode to remove entries
> instead of modifying them.  Enable recursive matching for both checkout
> and restore to make matching consistent.
> 
> Setting the flag in checkout_main() technically also affects git switch,
> but since that command doesn't accept pathspecs at all this has no
> actual consequence.

Thanks, I think this is the thing to do (and the code change looks
obviously correct ;) ).

This may cause a user-visible behavior change even in overlay mode
(because we'll now match some tree entries that we wouldn't before). But
I think it's an improvement, because it makes:

  git checkout <tree> -- <paths>

consistent with:

  git checkout -- <paths>

I don't know if you want to call that out more directly in the commit
message.

-Peff