submodule: rename 'new' variables

Rename C++ keyword in order to bring the codebase closer to being able
to be compiled with a C++ compiler.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

submodule.c

@@ -590,7 +590,7 @@ void show_submodule_inline_diff(struct diff_options *o, const char *path,
 		struct object_id *one, struct object_id *two,
 		unsigned dirty_submodule)
 {
-	const struct object_id *old = the_hash_algo->empty_tree, *new = the_hash_algo->empty_tree;
+	const struct object_id *old_oid = the_hash_algo->empty_tree, *new_oid = the_hash_algo->empty_tree;
 	struct commit *left = NULL, *right = NULL;
 	struct commit_list *merge_bases = NULL;
 	struct child_process cp = CHILD_PROCESS_INIT;
@@ -605,9 +605,9 @@ void show_submodule_inline_diff(struct diff_options *o, const char *path,
 		goto done;
 
 	if (left)
-		old = one;
+		old_oid = one;
 	if (right)
-		new = two;
+		new_oid = two;
 
 	cp.git_cmd = 1;
 	cp.dir = path;
@@ -630,7 +630,7 @@ void show_submodule_inline_diff(struct diff_options *o, const char *path,
 		argv_array_pushf(&cp.args, "--dst-prefix=%s%s/",
 				 o->b_prefix, path);
 	}
-	argv_array_push(&cp.args, oid_to_hex(old));
+	argv_array_push(&cp.args, oid_to_hex(old_oid));
 	/*
 	 * If the submodule has modified content, we will diff against the
 	 * work tree, under the assumption that the user has asked for the
@@ -638,7 +638,7 @@ void show_submodule_inline_diff(struct diff_options *o, const char *path,
 	 * haven't yet been committed to the submodule yet.
 	 */
 	if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED))
-		argv_array_push(&cp.args, oid_to_hex(new));
+		argv_array_push(&cp.args, oid_to_hex(new_oid));
 
 	prepare_submodule_repo_env(&cp.env_array);
 	if (start_command(&cp))
@@ -1578,8 +1578,8 @@ static void submodule_reset_index(const char *path)
  * pass NULL for old or new respectively.
  */
 int submodule_move_head(const char *path,
-			 const char *old,
-			 const char *new,
+			 const char *old_head,
+			 const char *new_head,
 			 unsigned flags)
 {
 	int ret = 0;
@@ -1600,7 +1600,7 @@ int submodule_move_head(const char *path,
 	else
 		error_code_ptr = NULL;
 
-	if (old && !is_submodule_populated_gently(path, error_code_ptr))
+	if (old_head && !is_submodule_populated_gently(path, error_code_ptr))
 		return 0;
 
 	sub = submodule_from_path(&null_oid, path);
@@ -1608,14 +1608,14 @@ int submodule_move_head(const char *path,
 	if (!sub)
 		die("BUG: could not get submodule information for '%s'", path);
 
-	if (old && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
+	if (old_head && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) {
 		/* Check if the submodule has a dirty index. */
 		if (submodule_has_dirty_index(sub))
 			return error(_("submodule '%s' has dirty index"), path);
 	}
 
 	if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
-		if (old) {
+		if (old_head) {
 			if (!submodule_uses_gitfile(path))
 				absorb_git_dir_into_superproject("", path,
 					ABSORB_GITDIR_RECURSE_SUBMODULES);
@@ -1629,7 +1629,7 @@ int submodule_move_head(const char *path,
 			submodule_reset_index(path);
 		}
 
-		if (old && (flags & SUBMODULE_MOVE_HEAD_FORCE)) {
+		if (old_head && (flags & SUBMODULE_MOVE_HEAD_FORCE)) {
 			char *gitdir = xstrfmt("%s/modules/%s",
 				    get_git_common_dir(), sub->name);
 			connect_work_tree_and_git_dir(path, gitdir);
@@ -1658,9 +1658,9 @@ int submodule_move_head(const char *path,
 		argv_array_push(&cp.args, "-m");
 
 	if (!(flags & SUBMODULE_MOVE_HEAD_FORCE))
-		argv_array_push(&cp.args, old ? old : EMPTY_TREE_SHA1_HEX);
+		argv_array_push(&cp.args, old_head ? old_head : EMPTY_TREE_SHA1_HEX);
 
-	argv_array_push(&cp.args, new ? new : EMPTY_TREE_SHA1_HEX);
+	argv_array_push(&cp.args, new_head ? new_head : EMPTY_TREE_SHA1_HEX);
 
 	if (run_command(&cp)) {
 		ret = -1;
@@ -1668,7 +1668,7 @@ int submodule_move_head(const char *path,
 	}
 
 	if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) {
-		if (new) {
+		if (new_head) {
 			child_process_init(&cp);
 			/* also set the HEAD accordingly */
 			cp.git_cmd = 1;
@@ -1677,7 +1677,7 @@ int submodule_move_head(const char *path,
 
 			prepare_submodule_repo_env(&cp.env_array);
 			argv_array_pushl(&cp.args, "update-ref", "HEAD",
-					 "--no-deref", new, NULL);
+					 "--no-deref", new_head, NULL);
 
 			if (run_command(&cp)) {
 				ret = -1;

submodule.h

@@ -117,7 +117,7 @@ int submodule_to_gitdir(struct strbuf *buf, const char *submodule);
 #define SUBMODULE_MOVE_HEAD_FORCE   (1<<1)
 extern int submodule_move_head(const char *path,
 			       const char *old,
-			       const char *new,
+			       const char *new_head,
 			       unsigned flags);
 
 /*