[PATCH 6/8] submodule.c: stricter checking for submodules in is_submodule_modified

[Stefan Beller <sbeller@google.com>]

By having a stricter check in the superproject we catch errors earlier,
instead of spawning a child process to tell us.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
---
 submodule.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/submodule.c b/submodule.c
index 93d6f08b50..e06e52b993 100644
--- a/submodule.c
+++ b/submodule.c
@@ -1050,11 +1050,12 @@ unsigned is_submodule_modified(const char *path, int ignore_untracked)
 	git_dir = read_gitfile(buf.buf);
 	if (!git_dir)
 		git_dir = buf.buf;
-	if (!is_directory(git_dir)) {
+	if (!is_git_directory(git_dir)) {
+		if (is_directory(git_dir))
+			die(_("'%s' not recognized as a git repository"), git_dir);
 		strbuf_release(&buf);
 		/* The submodule is not checked out, so it is not modified */
 		return 0;
-
 	}
 	strbuf_reset(&buf);
 
-- 
2.12.1.438.gb674c4c09c