[PATCH 2/2] submodule: Add 'quiet' option in subcommand 'set-branch'

[Shourya Shukla <shouryashukla.oo@gmail.com>]

The subcommand 'set-branch' had the 'quiet' option which was
introduced in b57e8119e6 by Denton Liu but was never utilised due to
not setting of the 'GIT_QUIET' variable. Add functionality to
utilise the 'quiet' function.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Signed-off-by: Shourya Shukla <shouryashukla.oo@gmail.com>
---
There was an existence of the `quiet` option in the shell version of
'set-branch' but it was not used anywhere. I decided to add a utility
of the option here by setting GIT_QUIET to 1 in case of a `quiet` as
well as ensure proper functioning in the C version regarding the same.
The if-statement is inspired from what Junio suggested me in my previous
conversion of 'set-url'.

 builtin/submodule--helper.c | 6 ++++--
 git-submodule.sh            | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 5a8815b76e..36b69df5c4 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -2321,7 +2321,8 @@ static int module_set_branch(int argc, const char **argv, const char *prefix)
 		config_name = xstrfmt("submodule.%s.branch", path);
 		config_set_in_gitmodules_file_gently(config_name, newbranch);
 
-		printf(_("Default tracking branch set to '%s' successfully\n"), newbranch);
+		if (!(quiet ? OPT_QUIET : 0))
+			printf(_("Default tracking branch set to '%s' successfully\n"), newbranch);
 		free(config_name);
 	}
 
@@ -2334,7 +2335,8 @@ static int module_set_branch(int argc, const char **argv, const char *prefix)
 		config_name = xstrfmt("submodule.%s.branch", path);
 		config_set_in_gitmodules_file_gently(config_name, NULL);
 
-		printf(_("Default tracking branch set to 'master' successfully\n"));
+		if (!(quiet ? OPT_QUIET : 0))
+			printf(_("Default tracking branch set to 'master' successfully\n"));
 		free(config_name);
 	}
 
diff --git a/git-submodule.sh b/git-submodule.sh
index 2438ef576e..0cdc77ace6 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -725,7 +725,7 @@ cmd_set_branch() {
 	do
 		case "$1" in
 		-q|--quiet)
-			# we don't do anything with this but we need to accept it
+			GIT_QUIET=1
 			;;
 		-d|--default)
 			default=1
-- 
2.26.2