builtin/repo: add disk size info to keyvalue stucture output

Similar to a prior commit, extend the keyvalue and nul output formats of
the git-repo(1) structure command to additionally provide info regarding
total object disk sizes by object type.

Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-repo.adoc

diff --git a/Documentation/git-repo.adoc b/Documentation/git-repo.adoc
index 287eee4..861073f 100644
--- a/Documentation/git-repo.adoc
+++ b/Documentation/git-repo.adoc
@@ -51,6 +51,7 @@
 * Reference counts categorized by type
 * Reachable object counts categorized by type
 * Total inflated size of reachable objects by type
+* Total disk size of reachable objects by type
 
 +
 The output format can be chosen through the flag `--format`. Three formats are

builtin/repo.c

diff --git a/builtin/repo.c b/builtin/repo.c
index 67d7548..7ea051f 100644
--- a/builtin/repo.c
+++ b/builtin/repo.c
@@ -214,6 +214,7 @@ struct object_values {
 struct object_stats {
 	struct object_values type_counts;
 	struct object_values inflated_sizes;
+	struct object_values disk_sizes;
 };
 
 struct repo_structure {
@@ -462,6 +463,15 @@ static void structure_keyvalue_print(struct repo_structure *stats,
 	printf("objects.tags.inflated_size%c%" PRIuMAX "%c", key_delim,
 	       (uintmax_t)stats->objects.inflated_sizes.tags, value_delim);
 
+	printf("objects.commits.disk_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.disk_sizes.commits, value_delim);
+	printf("objects.trees.disk_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.disk_sizes.trees, value_delim);
+	printf("objects.blobs.disk_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.disk_sizes.blobs, value_delim);
+	printf("objects.tags.disk_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.disk_sizes.tags, value_delim);
+
 	fflush(stdout);
 }
 
@@ -536,13 +546,16 @@ static int count_objects(const char *path UNUSED, struct oid_array *oids,
 	struct count_objects_data *data = cb_data;
 	struct object_stats *stats = data->stats;
 	size_t inflated_total = 0;
+	size_t disk_total = 0;
 	size_t object_count;
 
 	for (size_t i = 0; i < oids->nr; i++) {
 		struct object_info oi = OBJECT_INFO_INIT;
 		unsigned long inflated;
+		off_t disk;
 
 		oi.sizep = &inflated;
+		oi.disk_sizep = &disk;
 
 		if (odb_read_object_info_extended(data->odb, &oids->oid[i], &oi,
 						  OBJECT_INFO_SKIP_FETCH_OBJECT |
@@ -550,24 +563,29 @@ static int count_objects(const char *path UNUSED, struct oid_array *oids,
 			continue;
 
 		inflated_total += inflated;
+		disk_total += disk;
 	}
 
 	switch (type) {
 	case OBJ_TAG:
 		stats->type_counts.tags += oids->nr;
 		stats->inflated_sizes.tags += inflated_total;
+		stats->disk_sizes.tags += disk_total;
 		break;
 	case OBJ_COMMIT:
 		stats->type_counts.commits += oids->nr;
 		stats->inflated_sizes.commits += inflated_total;
+		stats->disk_sizes.commits += disk_total;
 		break;
 	case OBJ_TREE:
 		stats->type_counts.trees += oids->nr;
 		stats->inflated_sizes.trees += inflated_total;
+		stats->disk_sizes.trees += disk_total;
 		break;
 	case OBJ_BLOB:
 		stats->type_counts.blobs += oids->nr;
 		stats->inflated_sizes.blobs += inflated_total;
+		stats->disk_sizes.blobs += disk_total;
 		break;
 	default:
 		BUG("invalid object type");

t/t1901-repo-structure.sh

diff --git a/t/t1901-repo-structure.sh b/t/t1901-repo-structure.sh
index b18213c..dd17caa 100755
--- a/t/t1901-repo-structure.sh
+++ b/t/t1901-repo-structure.sh
@@ -4,6 +4,11 @@
 
 . ./test-lib.sh
 
+object_type_disk_usage() {
+	git rev-list --all --objects --disk-usage --filter=object:type=$1 \
+		--filter-provided-objects
+}
+
 test_expect_success 'empty repository' '
 	test_when_finished "rm -rf repo" &&
 	git init repo &&
@@ -91,7 +96,7 @@
 		test_commit_bulk 42 &&
 		git tag -a foo -m bar &&
 
-		cat >expect <<-\EOF &&
+		cat >expect <<-EOF &&
 		references.branches.count=1
 		references.tags.count=1
 		references.remotes.count=0
@@ -104,6 +109,10 @@
 		objects.trees.inflated_size=28554
 		objects.blobs.inflated_size=453
 		objects.tags.inflated_size=132
+		objects.commits.disk_size=$(object_type_disk_usage commit)
+		objects.trees.disk_size=$(object_type_disk_usage tree)
+		objects.blobs.disk_size=$(object_type_disk_usage blob)
+		objects.tags.disk_size=$(object_type_disk_usage tag)
 		EOF
 
 		git repo structure --format=keyvalue >out 2>err &&