http tests: use "test_hook" for "smart" and "dumb" http tests

Change the http tests to use "test_hook" insteadd of
"write_script". In both cases we can get rid of sub-shelling. For
"t/t5550-http-fetch-dumb.sh" add a trivial helper which sets up the
hook and calls "update-server-info".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5541-http-push-smart.sh

@@ -419,10 +419,7 @@ test_expect_success CMDLINE_LIMIT 'push 2000 tags over http' '
 '
 
 test_expect_success GPG 'push with post-receive to inspect certificate' '
-	(
+	test_hook -C "$HTTPD_DOCUMENT_ROOT_PATH"/test_repo.git post-receive <<-\EOF &&
-		cd "$HTTPD_DOCUMENT_ROOT_PATH"/test_repo.git &&
-		mkdir -p hooks &&
-		write_script hooks/post-receive <<-\EOF &&
 		# discard the update list
 		cat >/dev/null
 		# record the push certificate
@@ -437,8 +434,9 @@ test_expect_success GPG 'push with post-receive to inspect certificate' '
 		NONCE_STATUS=${GIT_PUSH_CERT_NONCE_STATUS-nononcestatus}
 		NONCE=${GIT_PUSH_CERT_NONCE-nononce}
 		E_O_F
-		EOF
+	EOF
-
+	(
+		cd "$HTTPD_DOCUMENT_ROOT_PATH"/test_repo.git &&
 		git config receive.certnonceseed sekrit &&
 		git config receive.certnonceslop 30
 	) &&

t/t5550-http-fetch-dumb.sh

@@ -25,16 +25,17 @@ test_expect_success 'setup repository' '
 	git commit -m two
 '
 
+setup_post_update_server_info_hook () {
+	test_hook --setup -C "$1" post-update <<-\EOF &&
+	exec git update-server-info
+	EOF
+	git -C "$1" update-server-info
+}
+
 test_expect_success 'create http-accessible bare repository with loose objects' '
 	cp -R .git "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
-	(cd "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
+	git -C "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" config core.bare true &&
-	 git config core.bare true &&
+	setup_post_update_server_info_hook "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
-	 mkdir -p hooks &&
-	 write_script "hooks/post-update" <<-\EOF &&
-	 exec git update-server-info
-	EOF
-	 hooks/post-update
-	) &&
 	git remote add public "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
 	git push public main:main
 '
@@ -62,13 +63,7 @@ test_expect_success 'create password-protected repository' '
 
 test_expect_success 'create empty remote repository' '
 	git init --bare "$HTTPD_DOCUMENT_ROOT_PATH/empty.git" &&
-	(cd "$HTTPD_DOCUMENT_ROOT_PATH/empty.git" &&
+	setup_post_update_server_info_hook "$HTTPD_DOCUMENT_ROOT_PATH/empty.git"
-	 mkdir -p hooks &&
-	 write_script "hooks/post-update" <<-\EOF &&
-	 exec git update-server-info
-	EOF
-	 hooks/post-update
-	)
 '
 
 test_expect_success 'empty dumb HTTP repository has default hash algorithm' '