http-push: send out fetch requests on queue

Previously, requests for remote files were simply added to the queue
(pointed to by request_queue_head) and no transfer actually takes
place (the fill function add_fill_function() is not added until line
2441), even though code that followed may rely on these remote files to
be present (eg. the setup_revisions invocation).

The code that sends out the requests on the request queue is refactored
into the method run_request_queue.

After the get_dav_remote_heads invocation (ie. after fetch requests are
added to the queue), the requests on the queue are sent out through an
invocation to run_request_queue.

This invocation to run_request_queue entails adding a fill function
before pushing checks take place, which may lead to accidental,
unwanted pushes previously.

The flag is_running_queue is introduced to prevent this from occurring.
fill_active_slot is made to check the flag is_running_queue before
the sending of the requests proceeds.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

http-push.c

@@ -846,11 +846,12 @@ static void finish_request(struct transfer_request *request)
 }
 
 #ifdef USE_CURL_MULTI
+static int is_running_queue;
 static int fill_active_slot(void *unused)
 {
 	struct transfer_request *request;
 
-	if (aborted)
+	if (aborted || !is_running_queue)
 		return 0;
 
 	for (request = request_queue_head; request; request = request->next) {
@@ -2173,6 +2174,25 @@ static int delete_remote_branch(char *pattern, int force)
 	return 0;
 }
 
+void run_request_queue(void)
+{
+#ifdef USE_CURL_MULTI
+	is_running_queue = 1;
+	fill_active_slots();
+	add_fill_function(NULL, fill_active_slot);
+#endif
+	do {
+		finish_all_active_slots();
+#ifdef USE_CURL_MULTI
+		fill_active_slots();
+#endif
+	} while (request_queue_head && !aborted);
+
+#ifdef USE_CURL_MULTI
+	is_running_queue = 0;
+#endif
+}
+
 int main(int argc, char **argv)
 {
 	struct transfer_request *request;
@@ -2277,6 +2297,8 @@ int main(int argc, char **argv)
 		repo->url = rewritten_url;
 	}
 
+	is_running_queue = 0;
+
 	/* Verify DAV compliance/lock support */
 	if (!locking_available()) {
 		rc = 1;
@@ -2306,6 +2328,7 @@ int main(int argc, char **argv)
 	local_refs = get_local_heads();
 	fprintf(stderr, "Fetching remote heads...\n");
 	get_dav_remote_heads();
+	run_request_queue();
 
 	/* Remove a remote branch if -d or -D was specified */
 	if (delete_branch) {
@@ -2435,16 +2458,8 @@ int main(int argc, char **argv)
 		if (objects_to_send)
 			fprintf(stderr, "    sending %d objects\n",
 				objects_to_send);
-#ifdef USE_CURL_MULTI
-		fill_active_slots();
-		add_fill_function(NULL, fill_active_slot);
-#endif
-		do {
-			finish_all_active_slots();
-#ifdef USE_CURL_MULTI
-			fill_active_slots();
-#endif
-		} while (request_queue_head && !aborted);
+
+		run_request_queue();
 
 		/* Update the remote branch if all went well */
 		if (aborted || !update_remote(ref->new_sha1, ref_lock))

t/t5540-http-push.sh

@@ -67,7 +67,7 @@ test_expect_success ' push to remote repository with unpacked refs' '
 	 test $HEAD = $(git rev-parse --verify HEAD))
 '
 
-test_expect_failure 'http-push fetches unpacked objects' '
+test_expect_success 'http-push fetches unpacked objects' '
 	cp -R "$HTTPD_DOCUMENT_ROOT_PATH"/test_repo.git \
 		"$HTTPD_DOCUMENT_ROOT_PATH"/test_repo_unpacked.git &&
 
@@ -83,7 +83,7 @@ test_expect_failure 'http-push fetches unpacked objects' '
 	 git push -f -v $HTTPD_URL/test_repo_unpacked.git master)
 '
 
-test_expect_failure 'http-push fetches packed objects' '
+test_expect_success 'http-push fetches packed objects' '
 	cp -R "$HTTPD_DOCUMENT_ROOT_PATH"/test_repo.git \
 		"$HTTPD_DOCUMENT_ROOT_PATH"/test_repo_packed.git &&