From 15cdc6477634e0227e4211de464c6443a68172c9 Mon Sep 17 00:00:00 2001
From: Stefan Beller <sbeller@google.com>
Date: Tue, 14 Mar 2017 14:46:31 -0700
Subject: make is_submodule_populated gently

We need the gentle version in a later patch. As we have just one caller,
migrate the caller.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/grep.c b/builtin/grep.c
index 2c727ef..b17835a 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -616,7 +616,7 @@ static int grep_submodule(struct grep_opt *opt, const unsigned char *sha1,
 {
 	if (!is_submodule_initialized(path))
 		return 0;
-	if (!is_submodule_populated(path)) {
+	if (!is_submodule_populated_gently(path, NULL)) {
 		/*
 		 * If searching history, check for the presense of the
 		 * submodule's gitdir before skipping the submodule.
diff --git a/submodule.c b/submodule.c
index 45e93a1..04d1857 100644
--- a/submodule.c
+++ b/submodule.c
@@ -234,15 +234,12 @@ int is_submodule_initialized(const char *path)
 	return ret;
 }
 
-/*
- * Determine if a submodule has been populated at a given 'path'
- */
-int is_submodule_populated(const char *path)
+int is_submodule_populated_gently(const char *path, int *return_error_code)
 {
 	int ret = 0;
 	char *gitdir = xstrfmt("%s/.git", path);
 
-	if (resolve_gitdir(gitdir))
+	if (resolve_gitdir_gently(gitdir, return_error_code))
 		ret = 1;
 
 	free(gitdir);
diff --git a/submodule.h b/submodule.h
index 05ab674..0b915bd 100644
--- a/submodule.h
+++ b/submodule.h
@@ -41,7 +41,13 @@ extern int submodule_config(const char *var, const char *value, void *cb);
 extern void gitmodules_config(void);
 extern void gitmodules_config_sha1(const unsigned char *commit_sha1);
 extern int is_submodule_initialized(const char *path);
-extern int is_submodule_populated(const char *path);
+/*
+ * Determine if a submodule has been populated at a given 'path' by checking if
+ * the <path>/.git resolves to a valid git repository.
+ * If return_error_code is NULL, die on error.
+ * Otherwise the return error code is the same as of resolve_gitdir_gently.
+ */
+extern int is_submodule_populated_gently(const char *path, int *return_error_code);
 extern int parse_submodule_update_strategy(const char *value,
 		struct submodule_update_strategy *dst);
 extern const char *submodule_strategy_to_string(const struct submodule_update_strategy *s);
-- 
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