[PATCH 10/11] midx-write.c: check count of packs to repack after grouping

[Taylor Blau <me@ttaylorr.com>]

In both fill_included_packs_all() and fill_included_packs_batch(), we
accumulate a list of packs whose contents we want to repack together,
and then use that information to feed a list of objects as input to
pack-objects.

In both cases, the `fill_included_packs_` functions keep track of how
many packs they want to repack together, and only execute pack-objects
if there are at least two packs that need repacking.

Having both of these functions keep track of this information themselves
is not strictly necessary, since they also log which packs to repack via
the `include_pack` array, so we can simply count the non-zero entries in
that array after either function is done executing, reducing the overall
amount of code necessary.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 midx-write.c | 44 ++++++++++++++++++++------------------------
 1 file changed, 20 insertions(+), 24 deletions(-)

diff --git a/midx-write.c b/midx-write.c
index 2f0f5d133f..4f1d649aa6 100644
--- a/midx-write.c
+++ b/midx-write.c
@@ -1367,11 +1367,11 @@ static int want_included_pack(struct repository *r,
 	return 1;
 }
 
-static int fill_included_packs_all(struct repository *r,
-				   struct multi_pack_index *m,
-				   unsigned char *include_pack)
+static void fill_included_packs_all(struct repository *r,
+				    struct multi_pack_index *m,
+				    unsigned char *include_pack)
 {
-	uint32_t i, count = 0;
+	uint32_t i;
 	int pack_kept_objects = 0;
 
 	repo_config_get_bool(r, "repack.packkeptobjects", &pack_kept_objects);
@@ -1381,18 +1381,15 @@ static int fill_included_packs_all(struct repository *r,
 			continue;
 
 		include_pack[i] = 1;
-		count++;
 	}
-
-	return count < 2;
 }
 
-static int fill_included_packs_batch(struct repository *r,
-				     struct multi_pack_index *m,
-				     unsigned char *include_pack,
-				     size_t batch_size)
+static void fill_included_packs_batch(struct repository *r,
+				      struct multi_pack_index *m,
+				      unsigned char *include_pack,
+				      size_t batch_size)
 {
-	uint32_t i, packs_to_repack;
+	uint32_t i;
 	size_t total_size;
 	struct repack_info *pack_info;
 	int pack_kept_objects = 0;
@@ -1418,7 +1415,6 @@ static int fill_included_packs_batch(struct repository *r,
 	QSORT(pack_info, m->num_packs, compare_by_mtime);
 
 	total_size = 0;
-	packs_to_repack = 0;
 	for (i = 0; total_size < batch_size && i < m->num_packs; i++) {
 		int pack_int_id = pack_info[i].pack_int_id;
 		struct packed_git *p = m->packs[pack_int_id];
@@ -1434,23 +1430,17 @@ static int fill_included_packs_batch(struct repository *r,
 		if (expected_size >= batch_size)
 			continue;
 
-		packs_to_repack++;
 		total_size += expected_size;
 		include_pack[pack_int_id] = 1;
 	}
 
 	free(pack_info);
-
-	if (packs_to_repack < 2)
-		return 1;
-
-	return 0;
 }
 
 int midx_repack(struct repository *r, const char *object_dir, size_t batch_size, unsigned flags)
 {
 	int result = 0;
-	uint32_t i;
+	uint32_t i, packs_to_repack = 0;
 	unsigned char *include_pack;
 	struct child_process cmd = CHILD_PROCESS_INIT;
 	FILE *cmd_in;
@@ -1469,10 +1459,16 @@ int midx_repack(struct repository *r, const char *object_dir, size_t batch_size,
 
 	CALLOC_ARRAY(include_pack, m->num_packs);
 
-	if (batch_size) {
-		if (fill_included_packs_batch(r, m, include_pack, batch_size))
-			goto cleanup;
-	} else if (fill_included_packs_all(r, m, include_pack))
+	if (batch_size)
+		fill_included_packs_batch(r, m, include_pack, batch_size);
+	else
+		fill_included_packs_all(r, m, include_pack);
+
+	for (i = 0; i < m->num_packs; i++) {
+		if (include_pack[i])
+			packs_to_repack++;
+	}
+	if (packs_to_repack <= 1)
 		goto cleanup;
 
 	repo_config_get_bool(r, "repack.usedeltabaseoffset", &delta_base_offset);
-- 
2.44.0.290.g736be63234b