From 860cba61a3eac38151fd203547df7515023303e9 Mon Sep 17 00:00:00 2001
From: Jeff King <peff@peff.net>
Date: Thu, 28 Apr 2016 09:37:44 -0400
Subject: submodule: export sanitized GIT_CONFIG_PARAMETERS

Commit 14111fc (git: submodule honor -c credential.* from
command line, 2016-02-29) taught git-submodule.sh to save
the sanitized value of $GIT_CONFIG_PARAMETERS when clearing
the environment for a submodule. However, it failed to
export the result, meaning that it had no effect for any
sub-programs.

We didn't catch this in our initial tests because we checked
only the "clone" case, which does not go through the shell
script at all. Provoking "git submodule update" to do a
fetch demonstrates the bug.

Noticed-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-submodule.sh b/git-submodule.sh
index 1f132b4..91f5856 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -200,6 +200,7 @@ sanitize_submodule_env()
 	sanitized_config=$(git submodule--helper sanitize-config)
 	clear_local_git_env
 	GIT_CONFIG_PARAMETERS=$sanitized_config
+	export GIT_CONFIG_PARAMETERS
 }
 
 #
diff --git a/t/t5550-http-fetch-dumb.sh b/t/t5550-http-fetch-dumb.sh
index e8e91bb..13ac788 100755
--- a/t/t5550-http-fetch-dumb.sh
+++ b/t/t5550-http-fetch-dumb.sh
@@ -112,6 +112,23 @@ test_expect_success 'cmdline credential config passes to submodule via clone' '
 	expect_askpass pass user@host
 '
 
+test_expect_success 'cmdline credential config passes submodule update' '
+	# advance the submodule HEAD so that a fetch is required
+	git commit --allow-empty -m foo &&
+	git push "$HTTPD_DOCUMENT_ROOT_PATH/auth/dumb/repo.git" HEAD &&
+	sha1=$(git rev-parse HEAD) &&
+	git -C super-clone update-index --cacheinfo 160000,$sha1,sub &&
+
+	set_askpass wrong pass@host &&
+	test_must_fail git -C super-clone submodule update &&
+
+	set_askpass wrong pass@host &&
+	git -C super-clone \
+	    -c "credential.$HTTPD_URL.username=user@host" \
+	    submodule update &&
+	expect_askpass pass user@host
+'
+
 test_expect_success 'fetch changes via http' '
 	echo content >>file &&
 	git commit -a -m two &&
-- 
cgit v0.10.2-6-g49f6