Read the submodule branch option from Git 1.8.2.

include/git2/submodule.h

@@ -284,6 +284,14 @@ GIT_EXTERN(const char *) git_submodule_path(git_submodule *submodule);
 GIT_EXTERN(const char *) git_submodule_url(git_submodule *submodule);
 
 /**
+* Get the branch for the submodule.
+*
+* @param submodule Pointer to submodule object
+* @return Pointer to the submodule branch
+*/
+GIT_EXTERN(const char *) git_submodule_branch(git_submodule *submodule);
+
+/**
  * Set the URL for the submodule.
  *
  * This sets the URL in memory for the submodule. This will be used for

src/submodule.c

@@ -472,6 +472,10 @@ int git_submodule_save(git_submodule *submodule)
 		(error = git_config_file_set_string(mods, key.ptr, submodule->url)) < 0)
 		goto cleanup;
 
+	if ((error = submodule_config_key_trunc_puts(&key, "branch")) < 0 ||
+		(error = git_config_file_set_string(mods, key.ptr, submodule->branch)) < 0)
+		goto cleanup;
+
 	if (!(error = submodule_config_key_trunc_puts(&key, "update")) &&
 		(val = git_submodule_update_to_str(submodule->update)) != NULL)
 		error = git_config_file_set_string(mods, key.ptr, val);
@@ -528,6 +532,12 @@ const char *git_submodule_url(git_submodule *submodule)
 	return submodule->url;
 }
 
+const char *git_submodule_branch(git_submodule *submodule)
+{
+	assert(submodule);
+	return submodule->branch;
+}
+
 int git_submodule_set_url(git_submodule *submodule, const char *url)
 {
 	assert(submodule && url);
@@ -992,6 +1002,7 @@ static git_submodule *submodule_alloc(git_repository *repo, const char *name)
 	sm->update = sm->update_default = GIT_SUBMODULE_UPDATE_CHECKOUT;
 	sm->fetch_recurse = sm->update_default = GIT_SUBMODULE_RECURSE_YES;
 	sm->repo   = repo;
+	sm->branch = NULL;
 
 	return sm;
 }
@@ -1190,6 +1201,15 @@ static int submodule_load_from_config(
 			goto done;
 		}
 	}
+	else if (strcasecmp(property, "branch") == 0) {
+		git__free(sm->branch);
+		sm->branch = NULL;
+
+		if (value != NULL && (sm->branch = git__strdup(value)) == NULL) {
+			error = -1;
+			goto done;
+		}
+	}
 	else if (strcasecmp(property, "update") == 0) {
 		if ((error = git_submodule_parse_update(&sm->update, value)) < 0)
 			goto done;

src/submodule.h

@@ -81,6 +81,7 @@ struct git_submodule {
 	char *name;
 	char *path; /* important: may just point to "name" string */
 	char *url;
+	char *branch;
 	git_submodule_update_t update;
 	git_submodule_update_t update_default;
 	git_submodule_ignore_t ignore;