1 files changed, 16 insertions, 7 deletions

diff --git a/submodule-config.c b/submodule-config.c
index 8ac5031ade..077db4054f 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -30,7 +30,7 @@ enum lookup_type {
 	lookup_path
 };
 
-static struct submodule_cache cache;
+static struct submodule_cache the_submodule_cache;
 static int is_cache_init;
 
 static int config_path_cmp(const struct submodule_entry *a,
@@ -199,6 +199,7 @@ static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
 	submodule->update_strategy.command = NULL;
 	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
 	submodule->ignore = NULL;
+	submodule->recommend_shallow = -1;
 
 	hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);
 
@@ -353,6 +354,14 @@ static int parse_config(const char *var, const char *value, void *data)
 		else if (parse_submodule_update_strategy(value,
 			 &submodule->update_strategy) < 0)
 				die(_("invalid value for %s"), var);
+	} else if (!strcmp(item.buf, "shallow")) {
+		if (!me->overwrite && submodule->recommend_shallow != -1)
+			warn_multiple_config(me->commit_sha1, submodule->name,
+					     "shallow");
+		else {
+			submodule->recommend_shallow =
+				git_config_bool(var, value);
+		}
 	}
 
 	strbuf_release(&name);
@@ -368,7 +377,7 @@ static int gitmodule_sha1_from_commit(const unsigned char *commit_sha1,
 	int ret = 0;
 
 	if (is_null_sha1(commit_sha1)) {
-		hashcpy(gitmodules_sha1, null_sha1);
+		hashclr(gitmodules_sha1);
 		return 1;
 	}
 
@@ -470,14 +479,14 @@ static void ensure_cache_init(void)
 	if (is_cache_init)
 		return;
 
-	cache_init(&cache);
+	cache_init(&the_submodule_cache);
 	is_cache_init = 1;
 }
 
 int parse_submodule_config_option(const char *var, const char *value)
 {
 	struct parse_config_parameter parameter;
-	parameter.cache = &cache;
+	parameter.cache = &the_submodule_cache;
 	parameter.commit_sha1 = NULL;
 	parameter.gitmodules_sha1 = null_sha1;
 	parameter.overwrite = 1;
@@ -490,18 +499,18 @@ const struct submodule *submodule_from_name(const unsigned char *commit_sha1,
 		const char *name)
 {
 	ensure_cache_init();
-	return config_from_name(&cache, commit_sha1, name);
+	return config_from_name(&the_submodule_cache, commit_sha1, name);
 }
 
 const struct submodule *submodule_from_path(const unsigned char *commit_sha1,
 		const char *path)
 {
 	ensure_cache_init();
-	return config_from_path(&cache, commit_sha1, path);
+	return config_from_path(&the_submodule_cache, commit_sha1, path);
 }
 
 void submodule_free(void)
 {
-	cache_free(&cache);
+	cache_free(&the_submodule_cache);
 	is_cache_init = 0;
 }