[RFC/WIP PATCH 3/3] submodule: simplify decision tree whether to or not to fetch

[Heiko Voigt <hvoigt@hvoigt.net>]

To make extending this logic later easier.

Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
---
 submodule.c | 50 +++++++++++++++++++++++++++-----------------------
 1 file changed, 27 insertions(+), 23 deletions(-)

diff --git a/submodule.c b/submodule.c
index b603000..a6fe16e 100644
--- a/submodule.c
+++ b/submodule.c
@@ -737,6 +737,23 @@ static void calculate_changed_submodule_paths(void)
 	submodule_config_cache_free(&submodule_config_cache);
 }
 
+static int get_fetch_recurse_config(const char *name, int command_line_option)
+{
+	if (command_line_option != RECURSE_SUBMODULES_DEFAULT)
+		return command_line_option;
+
+	struct string_list_item *fetch_recurse_submodules_option;
+	fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
+	if (fetch_recurse_submodules_option)
+		/* local config overrules everything except commandline */
+		return (intptr_t)fetch_recurse_submodules_option->util;
+
+	if (gitmodules_is_unmerged)
+		return RECURSE_SUBMODULES_OFF;
+
+	return config_fetch_recurse_submodules;
+}
+
 int fetch_populated_submodules(const struct argv_array *options,
 			       const char *prefix, int command_line_option,
 			       int quiet)
@@ -781,32 +798,19 @@ int fetch_populated_submodules(const struct argv_array *options,
 		if (name_for_path)
 			name = name_for_path->util;
 
-		default_argv = "yes";
-		if (command_line_option == RECURSE_SUBMODULES_DEFAULT) {
-			struct string_list_item *fetch_recurse_submodules_option;
-			fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
-			if (fetch_recurse_submodules_option) {
-				if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_OFF)
-					continue;
-				if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_ON_DEMAND) {
-					if (!unsorted_string_list_lookup(&changed_submodule_names, name))
-						continue;
-					default_argv = "on-demand";
-				}
-			} else {
-				if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) ||
-				    gitmodules_is_unmerged)
-					continue;
-				if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) {
-					if (!unsorted_string_list_lookup(&changed_submodule_names, name))
-						continue;
-					default_argv = "on-demand";
-				}
-			}
-		} else if (command_line_option == RECURSE_SUBMODULES_ON_DEMAND) {
+		switch (get_fetch_recurse_config(name, command_line_option)) {
+		default:
+		case RECURSE_SUBMODULES_DEFAULT:
+		case RECURSE_SUBMODULES_ON_DEMAND:
 			if (!unsorted_string_list_lookup(&changed_submodule_names, name))
 				continue;
 			default_argv = "on-demand";
+			break;
+		case RECURSE_SUBMODULES_ON:
+			default_argv = "yes";
+			break;
+		case RECURSE_SUBMODULES_OFF:
+			continue;
 		}
 
 		strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
-- 
1.8.2.rc0.25.g5062c01