midx: add progress to write_midx_file

Add progress to write_midx_file.  Progress is displayed
when the MIDX_PROGRESS flag is set.

Signed-off-by: William Baker <William.Baker@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

midx.c

@@ -448,6 +448,8 @@ struct pack_list {
 	uint32_t nr;
 	uint32_t alloc;
 	struct multi_pack_index *m;
+	struct progress *progress;
+	unsigned pack_paths_checked;
 };
 
 static void add_pack_to_midx(const char *full_path, size_t full_path_len,
@@ -456,6 +458,7 @@ static void add_pack_to_midx(const char *full_path, size_t full_path_len,
 	struct pack_list *packs = (struct pack_list *)data;
 
 	if (ends_with(file_name, ".idx")) {
+		display_progress(packs->progress, ++packs->pack_paths_checked);
 		if (packs->m && midx_contains_pack(packs->m, file_name))
 			return;
 
@@ -785,7 +788,7 @@ static size_t write_midx_large_offsets(struct hashfile *f, uint32_t nr_large_off
 }
 
 static int write_midx_internal(const char *object_dir, struct multi_pack_index *m,
-			       struct string_list *packs_to_drop)
+			       struct string_list *packs_to_drop, unsigned flags)
 {
 	unsigned char cur_chunk, num_chunks = 0;
 	char *midx_name;
@@ -799,6 +802,7 @@ static int write_midx_internal(const char *object_dir, struct multi_pack_index *
 	uint64_t chunk_offsets[MIDX_MAX_CHUNKS + 1];
 	uint32_t nr_entries, num_large_offsets = 0;
 	struct pack_midx_entry *entries = NULL;
+	struct progress *progress = NULL;
 	int large_offsets_needed = 0;
 	int pack_name_concat_len = 0;
 	int dropped_packs = 0;
@@ -833,7 +837,14 @@ static int write_midx_internal(const char *object_dir, struct multi_pack_index *
 		}
 	}
 
+	packs.pack_paths_checked = 0;
+	if (flags & MIDX_PROGRESS)
+		packs.progress = start_progress(_("Adding packfiles to multi-pack-index"), 0);
+	else
+		packs.progress = NULL;
+
 	for_each_file_in_pack_dir(object_dir, add_pack_to_midx, &packs);
+	stop_progress(&packs.progress);
 
 	if (packs.m && packs.nr == packs.m->num_packs && !packs_to_drop)
 		goto cleanup;
@@ -958,6 +969,9 @@ static int write_midx_internal(const char *object_dir, struct multi_pack_index *
 		written += MIDX_CHUNKLOOKUP_WIDTH;
 	}
 
+	if (flags & MIDX_PROGRESS)
+		progress = start_progress(_("Writing chunks to multi-pack-index"),
+					  num_chunks);
 	for (i = 0; i < num_chunks; i++) {
 		if (written != chunk_offsets[i])
 			BUG("incorrect chunk offset (%"PRIu64" != %"PRIu64") for chunk id %"PRIx32,
@@ -990,7 +1004,10 @@ static int write_midx_internal(const char *object_dir, struct multi_pack_index *
 				BUG("trying to write unknown chunk id %"PRIx32,
 				    chunk_ids[i]);
 		}
+
+		display_progress(progress, i + 1);
 	}
+	stop_progress(&progress);
 
 	if (written != chunk_offsets[num_chunks])
 		BUG("incorrect final offset %"PRIu64" != %"PRIu64,
@@ -1018,7 +1035,7 @@ cleanup:
 
 int write_midx_file(const char *object_dir, unsigned flags)
 {
-	return write_midx_internal(object_dir, NULL, NULL);
+	return write_midx_internal(object_dir, NULL, NULL, flags);
 }
 
 void clear_midx_file(struct repository *r)
@@ -1221,7 +1238,7 @@ int expire_midx_packs(struct repository *r, const char *object_dir, unsigned fla
 	free(count);
 
 	if (packs_to_drop.nr)
-		result = write_midx_internal(object_dir, m, &packs_to_drop);
+		result = write_midx_internal(object_dir, m, &packs_to_drop, flags);
 
 	string_list_clear(&packs_to_drop, 0);
 	return result;
@@ -1370,7 +1387,7 @@ int midx_repack(struct repository *r, const char *object_dir, size_t batch_size,
 		goto cleanup;
 	}
 
-	result = write_midx_internal(object_dir, m, NULL);
+	result = write_midx_internal(object_dir, m, NULL, flags);
 	m = NULL;
 
 cleanup: