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[PATCH v7 05/10] submodule--helper: add a new 'config' subcommand




Add a new 'config' subcommand to 'submodule--helper', this extra level
of indirection makes it possible to add some flexibility to how the
submodules configuration is handled.

Signed-off-by: Antonio Ospite <ao2@xxxxxx>
---
 builtin/submodule--helper.c | 14 ++++++++++++++
 t/t7411-submodule-config.sh | 27 +++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 80474c3ff5..9af6626e32 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -2126,6 +2126,19 @@ static int check_name(int argc, const char **argv, const char *prefix)
 	return 0;
 }
 
+static int module_config(int argc, const char **argv, const char *prefix)
+{
+	/* Equivalent to ACTION_GET in builtin/config.c */
+	if (argc == 2)
+		return print_config_from_gitmodules(the_repository, argv[1]);
+
+	/* Equivalent to ACTION_SET in builtin/config.c */
+	if (argc == 3)
+		return config_set_in_gitmodules_file_gently(argv[1], argv[2]);
+
+	die("submodule--helper config takes 1 or 2 arguments: name [value]");
+}
+
 #define SUPPORT_SUPER_PREFIX (1<<0)
 
 struct cmd_struct {
@@ -2155,6 +2168,7 @@ static struct cmd_struct commands[] = {
 	{"absorb-git-dirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
 	{"is-active", is_active, 0},
 	{"check-name", check_name, 0},
+	{"config", module_config, 0},
 };
 
 int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
diff --git a/t/t7411-submodule-config.sh b/t/t7411-submodule-config.sh
index b1f3c6489b..791245f18d 100755
--- a/t/t7411-submodule-config.sh
+++ b/t/t7411-submodule-config.sh
@@ -134,4 +134,31 @@ test_expect_success 'error in history in fetchrecursesubmodule lets continue' '
 	)
 '
 
+test_expect_success 'reading submodules config with "submodule--helper config"' '
+	(cd super &&
+		echo "../submodule" >expect &&
+		git submodule--helper config submodule.submodule.url >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'writing submodules config with "submodule--helper config"' '
+	(cd super &&
+		echo "new_url" >expect &&
+		git submodule--helper config submodule.submodule.url "new_url" &&
+		git submodule--helper config submodule.submodule.url >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'overwriting unstaged submodules config with "submodule--helper config"' '
+	test_when_finished "git -C super checkout .gitmodules" &&
+	(cd super &&
+		echo "newer_url" >expect &&
+		git submodule--helper config submodule.submodule.url "newer_url" &&
+		git submodule--helper config submodule.submodule.url >actual &&
+		test_cmp expect actual
+	)
+'
+
 test_done
-- 
2.19.1