Re: [PATCH 01/10] add: do not rely on dtype being NULL behavior

[Jonathan Nieder <jrnieder@gmail.com>]

Nguyen Thai Ngoc Duy wrote:
> On Mon, Nov 15, 2010 at 7:14 PM, Jonathan Nieder <jrnieder@gmail.com> wrote:

>>        Surely what was really wanted is to check paths against the
>>        index and work tree, defaulting to "regular file".
>>
>> Wait --- that's not true.  In the "git submodule add" case, we really
>> want to default to (or even better, force) "directory".
>
> Hmm.. get_index_dtype() would return DT_DIR if the submodule exists in
> index. If it does not it must be a directory in worktree, right?
> Call flow: excluded_from_list() -> get_dtype() -> get_index_dtype()

based on

	git ls-files --error-unmatch "$path" >/dev/null 2>&1 &&
	die "'$path' already exists in the index"

	if test -z "$force" && ! git add --dry-run --ignore-missing "$path" > /dev/null 2>&1
	then
		echo >&2 "The following path is ignored by one of your .gitignore files:" &&
		echo >&2 $path &&
		echo >&2 "Use -f if you really want to add it."
		exit 1
	fi

	# perhaps the path exists and is already a git repo, else clone it
	if test -e "$path"

I'd say no, the usual case is that the potential submodule does not
exist in the index or worktree, which is why that call site uses
--ignore-missing.