Re: [PATCH v2] pathspec: only match across submodule boundaries when requested

> Commit 74ed43711fd (grep: enable recurse-submodules to work on <tree>
> objects, 2016-12-16) taught 'tree_entry_interesting()' to be able to
> match across submodule boundaries in the presence of wildcards.  This is
> done by performing literal matching up to the first wildcard and then
> punting to the submodule itself to perform more accurate pattern
> matching.  Instead of introducing a new flag to request this behavior,
> commit 74ed43711fd overloaded the already existing 'recursive' flag in
> 'struct pathspec' to request this behavior.
> 
> This leads to a bug where whenever any other caller has the 'recursive'
> flag set as well as a pathspec with wildcards that all submodules will
> be indicated as matches.  One simple example of this is:
> 
> 	git init repo
> 	cd repo
> 
> 	git init submodule
> 	git -C submodule commit -m initial --allow-empty
> 
> 	touch "[bracket]"
> 	git add "[bracket]"
> 	git commit -m bracket
> 	git add submodule
> 	git commit -m submodule
> 
> 	git rev-list HEAD -- "[bracket]"
> 
> Fix this by introducing the new flag 'recurse_submodules' in 'struct
> pathspec' and using this flag to determine if matches should be allowed
> to cross submodule boundaries.
> 
> This fixes https://github.com/git-for-windows/git/issues/1371.