Add missing accessor for fetchRecurseSubmodules

When `git_submodule` became an opaque structure, I forgot to add
accessor functions for the fetchRecurseSubmodules config setting.
This fixes that.

include/git2/submodule.h

@@ -396,6 +396,35 @@ GIT_EXTERN(git_submodule_update_t) git_submodule_set_update(
 	git_submodule_update_t update);
 
 /**
+ * Read the fetchRecurseSubmodules rule for a submodule.
+ *
+ * This accesses the submodule.<name>.fetchRecurseSubmodules value for
+ * the submodule that controls fetching behavior for the submodule.
+ *
+ * Note that at this time, libgit2 does not honor this setting and the
+ * fetch functionality current ignores submodules.
+ *
+ * @return 0 if fetchRecurseSubmodules is false, 1 if true
+ */
+GIT_EXTERN(int) git_submodule_fetch_recurse_submodules(
+	git_submodule *submodule);
+
+/**
+ * Set the fetchRecurseSubmodules rule for a submodule.
+ *
+ * This sets the submodule.<name>.fetchRecurseSubmodules value for
+ * the submodule.  You should call `git_submodule_save()` if you want
+ * to persist the new value.
+ *
+ * @param submodule The submodule to modify
+ * @param fetch_recurse_submodules Boolean value
+ * @return old value for fetchRecurseSubmodules
+ */
+GIT_EXTERN(int) git_submodule_set_fetch_recurse_submodules(
+	git_submodule *submodule,
+	int fetch_recurse_submodules);
+
+/**
  * Copy submodule info into ".git/config" file.
  *
  * Just like "git submodule init", this copies information about the

src/submodule.c

@@ -595,6 +595,26 @@ git_submodule_update_t git_submodule_set_update(
 	return old;
 }
 
+int git_submodule_fetch_recurse_submodules(
+	git_submodule *submodule)
+{
+	assert(submodule);
+	return submodule->fetch_recurse;
+}
+
+int git_submodule_set_fetch_recurse_submodules(
+	git_submodule *submodule,
+	int fetch_recurse_submodules)
+{
+	int old;
+
+	assert(submodule);
+
+	old = submodule->fetch_recurse;
+	submodule->fetch_recurse = (fetch_recurse_submodules != 0);
+	return old;
+}
+
 int git_submodule_init(git_submodule *submodule, int overwrite)
 {
 	int error;

tests-clar/submodule/modify.c

@@ -183,6 +183,7 @@ void test_submodule_modify__edit_and_save(void)
 	git_submodule_ignore_t old_ignore;
 	git_submodule_update_t old_update;
 	git_repository *r2;
+	int old_fetchrecurse;
 
 	cl_git_pass(git_submodule_lookup(&sm1, g_repo, "sm_changed_head"));
 
@@ -192,12 +193,14 @@ void test_submodule_modify__edit_and_save(void)
 	cl_git_pass(git_submodule_set_url(sm1, SM_LIBGIT2_URL));
 	old_ignore = git_submodule_set_ignore(sm1, GIT_SUBMODULE_IGNORE_UNTRACKED);
 	old_update = git_submodule_set_update(sm1, GIT_SUBMODULE_UPDATE_REBASE);
+	old_fetchrecurse = git_submodule_set_fetch_recurse_submodules(sm1, 1);
 
 	cl_assert_equal_s(SM_LIBGIT2_URL, git_submodule_url(sm1));
 	cl_assert_equal_i(
 		(int)GIT_SUBMODULE_IGNORE_UNTRACKED, (int)git_submodule_ignore(sm1));
 	cl_assert_equal_i(
 		(int)GIT_SUBMODULE_UPDATE_REBASE, (int)git_submodule_update(sm1));
+	cl_assert_equal_i(1, git_submodule_fetch_recurse_submodules(sm1));
 
 	/* revert without saving (and confirm setters return old value) */
 	cl_git_pass(git_submodule_set_url(sm1, old_url));
@@ -207,16 +210,21 @@ void test_submodule_modify__edit_and_save(void)
 	cl_assert_equal_i(
 		(int)GIT_SUBMODULE_UPDATE_REBASE,
 		(int)git_submodule_set_update(sm1, GIT_SUBMODULE_UPDATE_DEFAULT));
+	cl_assert_equal_i(
+		1, git_submodule_set_fetch_recurse_submodules(sm1, old_fetchrecurse));
 
 	/* check that revert was successful */
 	cl_assert_equal_s(old_url, git_submodule_url(sm1));
 	cl_assert_equal_i((int)old_ignore, (int)git_submodule_ignore(sm1));
 	cl_assert_equal_i((int)old_update, (int)git_submodule_update(sm1));
+	cl_assert_equal_i(
+		old_fetchrecurse, git_submodule_fetch_recurse_submodules(sm1));
 
 	/* modify properties of submodule (again) */
 	cl_git_pass(git_submodule_set_url(sm1, SM_LIBGIT2_URL));
 	git_submodule_set_ignore(sm1, GIT_SUBMODULE_IGNORE_UNTRACKED);
 	git_submodule_set_update(sm1, GIT_SUBMODULE_UPDATE_REBASE);
+	git_submodule_set_fetch_recurse_submodules(sm1, 1);
 
 	/* call save */
 	cl_git_pass(git_submodule_save(sm1));
@@ -232,6 +240,7 @@ void test_submodule_modify__edit_and_save(void)
 		(int)GIT_SUBMODULE_IGNORE_UNTRACKED, (int)git_submodule_ignore(sm1));
 	cl_assert_equal_i(
 		(int)GIT_SUBMODULE_UPDATE_REBASE, (int)git_submodule_update(sm1));
+	cl_assert_equal_i(1, git_submodule_fetch_recurse_submodules(sm1));
 
 	/* call reload and check that the new values are loaded */
 	cl_git_pass(git_submodule_reload(sm1));
@@ -241,6 +250,7 @@ void test_submodule_modify__edit_and_save(void)
 		(int)GIT_SUBMODULE_IGNORE_UNTRACKED, (int)git_submodule_ignore(sm1));
 	cl_assert_equal_i(
 		(int)GIT_SUBMODULE_UPDATE_REBASE, (int)git_submodule_update(sm1));
+	cl_assert_equal_i(1, git_submodule_fetch_recurse_submodules(sm1));
 
 	/* open a second copy of the repo and compare submodule */
 	cl_git_pass(git_repository_open(&r2, "submod2"));
@@ -251,6 +261,7 @@ void test_submodule_modify__edit_and_save(void)
 		(int)GIT_SUBMODULE_IGNORE_UNTRACKED, (int)git_submodule_ignore(sm2));
 	cl_assert_equal_i(
 		(int)GIT_SUBMODULE_UPDATE_REBASE, (int)git_submodule_update(sm2));
+	cl_assert_equal_i(1, git_submodule_fetch_recurse_submodules(sm2));
 
 	git_repository_free(r2);
 	git__free(old_url);