remote: make _ls return the list directly

The callback-based method of listing remote references dates back to the
beginning of the network code's lifetime, when we didn't know any
better.

We need to keep the list around for update_tips() after disconnect() so
let's make use of this to simply give the user a pointer to the array so
they can write straightforward code instead of having to go through a
callback.

1 files changed, 6 insertions, 6 deletions

diff --git a/include/git2/transport.h b/include/git2/transport.h
index 147b3fdcb..81ebf4dc9 100644
--- a/include/git2/transport.h
+++ b/include/git2/transport.h
@@ -203,13 +203,13 @@ struct git_transport {
 		int direction,
 		int flags);
 
-	/* This function may be called after a successful call to connect(). The
-	 * provided callback is invoked for each ref discovered on the remote
-	 * end. */
+	/* This function may be called after a successful call to
+	 * connect(). The array returned is owned by the transport and
+	 * is guranteed until the next call of a transport function. */
 	int (*ls)(
-		git_transport *transport,
-		git_headlist_cb list_cb,
-		void *payload);
+		const git_remote_head ***out,
+		size_t *size,
+		git_transport *transport);
 
 	/* Executes the push whose context is in the git_push object. */
 	int (*push)(git_transport *transport, git_push *push);