indexer: include the delta stats

The user is unable to derive the number of deltas in the pack, as that
would require them to capture the stats exactly in the moment between
download and final processing, which is abstracted away in the fetch.

Capture these numbers for the user and expose them in the progress
struct. The clone and fetch examples now also present this information
to the user.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/indexer.c b/src/indexer.c
index 93ad116fe..f6e9ad902 100644
--- a/src/indexer.c
+++ b/src/indexer.c
@@ -483,6 +483,8 @@ int git_indexer_stream_add(git_indexer_stream *idx, const void *data, size_t siz
 
 		stats->received_objects = 0;
 		stats->local_objects = 0;
+		stats->total_deltas = 0;
+		stats->indexed_deltas = 0;
 		processed = stats->indexed_objects = 0;
 		stats->total_objects = total_objects;
 		do_progress_callback(idx, stats);
@@ -758,6 +760,7 @@ static int resolve_deltas(git_indexer_stream *idx, git_transfer_progress *stats)
 
 			git__free(obj.data);
 			stats->indexed_objects++;
+			stats->indexed_deltas++;
 			progressed = 1;
 			do_progress_callback(idx, stats);
 
@@ -866,6 +869,9 @@ int git_indexer_stream_finalize(git_indexer_stream *idx, git_transfer_progress *
 		return -1;
 	}
 
+	/* Freeze the number of deltas */
+	stats->total_deltas = stats->total_objects - stats->indexed_objects;
+
 	if (resolve_deltas(idx, stats) < 0)
 		return -1;