[PATCH v2 6/7] submodule update: refactor update targets

["Glen Choo via GitGitGadget" <gitgitgadget@gmail.com>]

From: Glen Choo <chooglen@google.com>

Refactor two "git submodule update" code locations so that they no
longer refer to oids directly. This shrinks the next commit's diff,
where this code will need to handle branches.

Signed-off-by: Glen Choo <chooglen@google.com>
---
 builtin/submodule--helper.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 138b133790f..990adeb2e19 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -2253,7 +2253,7 @@ static int fetch_in_submodule(const char *module_path, int depth, int quiet,
 static int run_update_command(const struct update_data *ud, int subforce)
 {
 	struct child_process cp = CHILD_PROCESS_INIT;
-	char *oid = oid_to_hex(&ud->oid);
+	const char *update_target = oid_to_hex(&ud->oid);;
 	int ret;
 
 	switch (ud->update_strategy.type) {
@@ -2283,7 +2283,7 @@ static int run_update_command(const struct update_data *ud, int subforce)
 		BUG("unexpected update strategy type: %d",
 		    ud->update_strategy.type);
 	}
-	strvec_push(&cp.args, oid);
+	strvec_push(&cp.args, update_target);
 
 	cp.dir = ud->sm_path;
 	prepare_submodule_repo_env(&cp.env);
@@ -2291,20 +2291,20 @@ static int run_update_command(const struct update_data *ud, int subforce)
 		switch (ud->update_strategy.type) {
 		case SM_UPDATE_CHECKOUT:
 			die_message(_("Unable to checkout '%s' in submodule path '%s'"),
-				    oid, ud->displaypath);
+				    update_target, ud->displaypath);
 			/* No "ret" assignment, use "git checkout"'s */
 			break;
 		case SM_UPDATE_REBASE:
 			ret = die_message(_("Unable to rebase '%s' in submodule path '%s'"),
-					  oid, ud->displaypath);
+					  update_target, ud->displaypath);
 			break;
 		case SM_UPDATE_MERGE:
 			ret = die_message(_("Unable to merge '%s' in submodule path '%s'"),
-					  oid, ud->displaypath);
+					  update_target, ud->displaypath);
 			break;
 		case SM_UPDATE_COMMAND:
 			ret = die_message(_("Execution of '%s %s' failed in submodule path '%s'"),
-					  ud->update_strategy.command, oid, ud->displaypath);
+					  ud->update_strategy.command, update_target, ud->displaypath);
 			break;
 		default:
 			BUG("unexpected update strategy type: %d",
@@ -2320,19 +2320,19 @@ static int run_update_command(const struct update_data *ud, int subforce)
 	switch (ud->update_strategy.type) {
 	case SM_UPDATE_CHECKOUT:
 		printf(_("Submodule path '%s': checked out '%s'\n"),
-		       ud->displaypath, oid);
+		       ud->displaypath, update_target);
 		break;
 	case SM_UPDATE_REBASE:
 		printf(_("Submodule path '%s': rebased into '%s'\n"),
-		       ud->displaypath, oid);
+		       ud->displaypath, update_target);
 		break;
 	case SM_UPDATE_MERGE:
 		printf(_("Submodule path '%s': merged in '%s'\n"),
-		       ud->displaypath, oid);
+		       ud->displaypath, update_target);
 		break;
 	case SM_UPDATE_COMMAND:
 		printf(_("Submodule path '%s': '%s %s'\n"),
-		       ud->displaypath, ud->update_strategy.command, oid);
+		       ud->displaypath, ud->update_strategy.command, update_target);
 		break;
 	default:
 		BUG("unexpected update strategy type: %d",
@@ -2519,6 +2519,7 @@ static void update_data_to_args(const struct update_data *update_data,
 
 static int update_submodule(struct update_data *update_data)
 {
+	int submodule_up_to_date;
 	int ret;
 
 	ret = determine_submodule_update_strategy(the_repository,
@@ -2567,7 +2568,8 @@ static int update_submodule(struct update_data *update_data)
 		free(remote_ref);
 	}
 
-	if (!oideq(&update_data->oid, &update_data->suboid) || update_data->force) {
+	submodule_up_to_date = oideq(&update_data->oid, &update_data->suboid);
+	if (!submodule_up_to_date || update_data->force) {
 		ret = run_update_procedure(update_data);
 		if (ret)
 			return ret;
-- 
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