send-pack: respect '+' on wildcard refspecs

When matching source and destination refs, we were failing
to pull the 'force' parameter from wildcard refspecs (but
not explicit ones) and attach it to the ref struct.

This adds a test for explicit and wildcard refspecs; the
latter fails without this patch.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

remote.c

@@ -626,6 +626,8 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
 			hashcpy(dst_peer->new_sha1, src->new_sha1);
 		}
 		dst_peer->peer_ref = src;
+		if (pat)
+			dst_peer->force = pat->force;
 	free_name:
 		free(dst_name);
 	}

t/t5400-send-pack.sh

@@ -123,4 +123,52 @@ test_expect_success \
 	git-branch -a >branches && ! grep -q origin/master branches
 '
 
+rewound_push_setup() {
+	rm -rf parent child &&
+	mkdir parent && cd parent &&
+	git-init && echo one >file && git-add file && git-commit -m one &&
+	echo two >file && git-commit -a -m two &&
+	cd .. &&
+	git-clone parent child && cd child && git-reset --hard HEAD^
+}
+
+rewound_push_succeeded() {
+	cmp ../parent/.git/refs/heads/master .git/refs/heads/master
+}
+
+rewound_push_failed() {
+	if rewound_push_succeeded
+	then
+		false
+	else
+		true
+	fi
+}
+
+test_expect_success \
+	'pushing explicit refspecs respects forcing' '
+	rewound_push_setup &&
+	if git-send-pack ../parent/.git refs/heads/master:refs/heads/master
+	then
+		false
+	else
+		true
+	fi && rewound_push_failed &&
+	git-send-pack ../parent/.git +refs/heads/master:refs/heads/master &&
+	rewound_push_succeeded
+'
+
+test_expect_success \
+	'pushing wildcard refspecs respects forcing' '
+	rewound_push_setup &&
+	if git-send-pack ../parent/.git refs/heads/*:refs/heads/*
+	then
+		false
+	else
+		true
+	fi && rewound_push_failed &&
+	git-send-pack ../parent/.git +refs/heads/*:refs/heads/* &&
+	rewound_push_succeeded
+'
+
 test_done