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builtin/repo: find commit with most parents

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Complex merge events may produce an octopus merge where the resulting
merge commit has more than two parents. While iterating through objects
in the repository for git-repo-structure, identify the commit with the
most parents and display it in the output.

Signed-off-by: Justin Tobler <jltobler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Justin Tobler
2026-03-02 15:45:25 -06:00
committed by Junio C Hamano
parent e00bb8c76e
commit 18952a1ef1
2 changed files with 123 additions and 73 deletions
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45
builtin/repo.c
View File

@@ -1,6 +1,7 @@
#define USE_THE_REPOSITORY_VARIABLE
#include "builtin.h"
#include "commit.h"
#include "environment.h"
#include "hash.h"
#include "hex.h"
@@ -208,6 +209,8 @@ struct largest_objects {
struct object_data commit_size;
struct object_data tree_size;
struct object_data blob_size;
struct object_data parent_count;
};
struct ref_stats {
@@ -318,6 +321,27 @@ static void stats_table_count_addf(struct stats_table *table, size_t value,
va_end(ap);
}
static void stats_table_object_count_addf(struct stats_table *table,
struct object_id *oid, size_t value,
const char *format, ...)
{
struct stats_table_entry *entry;
va_list ap;
CALLOC_ARRAY(entry, 1);
humanise_count(value, &entry->value, &entry->unit);
/*
* A NULL OID should not have a table annotation.
*/
if (!is_null_oid(oid))
entry->oid = oid;
va_start(ap, format);
stats_table_vaddf(table, entry, format, ap);
va_end(ap);
}
static void stats_table_size_addf(struct stats_table *table, size_t value,
const char *format, ...)
{
@@ -425,6 +449,10 @@ static void stats_table_setup_structure(struct stats_table *table,
&objects->largest.commit_size.oid,
objects->largest.commit_size.value,
" * %s", _("Maximum size"));
stats_table_object_count_addf(table,
&objects->largest.parent_count.oid,
objects->largest.parent_count.value,
" * %s", _("Maximum parents"));
stats_table_addf(table, " * %s", _("Trees"));
stats_table_object_size_addf(table,
&objects->largest.tree_size.oid,
@@ -595,6 +623,9 @@ static void structure_keyvalue_print(struct repo_structure *stats,
print_object_data("objects.tags.max_size", key_delim,
&stats->objects.largest.tag_size, value_delim);
print_object_data("objects.commits.max_parents", key_delim,
&stats->objects.largest.parent_count, value_delim);
fflush(stdout);
}
@@ -682,16 +713,24 @@ static int count_objects(const char *path UNUSED, struct oid_array *oids,
for (size_t i = 0; i < oids->nr; i++) {
struct object_info oi = OBJECT_INFO_INIT;
unsigned long inflated;
struct commit *commit;
struct object *obj;
void *content;
off_t disk;
int eaten;
oi.sizep = &inflated;
oi.disk_sizep = &disk;
oi.contentp = &content;
if (odb_read_object_info_extended(data->odb, &oids->oid[i], &oi,
OBJECT_INFO_SKIP_FETCH_OBJECT |
OBJECT_INFO_QUICK) < 0)
continue;
obj = parse_object_buffer(the_repository, &oids->oid[i], type,
inflated, content, &eaten);
switch (type) {
case OBJ_TAG:
stats->type_counts.tags++;
@@ -701,11 +740,14 @@ static int count_objects(const char *path UNUSED, struct oid_array *oids,
inflated);
break;
case OBJ_COMMIT:
commit = object_as_type(obj, OBJ_COMMIT, 0);
stats->type_counts.commits++;
stats->inflated_sizes.commits += inflated;
stats->disk_sizes.commits += disk;
check_largest(&stats->largest.commit_size, &oids->oid[i],
inflated);
check_largest(&stats->largest.parent_count, &oids->oid[i],
commit_list_count(commit->parents));
break;
case OBJ_TREE:
stats->type_counts.trees++;
@@ -724,6 +766,9 @@ static int count_objects(const char *path UNUSED, struct oid_array *oids,
default:
BUG("invalid object type");
}
if (!eaten)
free(content);
}
object_count = get_total_object_values(&stats->type_counts);

151
t/t1901-repo-structure.sh
View File

@@ -27,41 +27,42 @@ test_expect_success 'empty repository' '
(
cd repo &&
cat >expect <<-\EOF &&
| Repository structure | Value |
| ------------------------ | ------ |
| * References | |
| * Count | 0 |
| * Branches | 0 |
| * Tags | 0 |
| * Remotes | 0 |
| * Others | 0 |
| | |
| * Reachable objects | |
| * Count | 0 |
| * Commits | 0 |
| * Trees | 0 |
| * Blobs | 0 |
| * Tags | 0 |
| * Inflated size | 0 B |
| * Commits | 0 B |
| * Trees | 0 B |
| * Blobs | 0 B |
| * Tags | 0 B |
| * Disk size | 0 B |
| * Commits | 0 B |
| * Trees | 0 B |
| * Blobs | 0 B |
| * Tags | 0 B |
| | |
| * Largest objects | |
| * Commits | |
| * Maximum size | 0 B |
| * Trees | |
| * Maximum size | 0 B |
| * Blobs | |
| * Maximum size | 0 B |
| * Tags | |
| * Maximum size | 0 B |
| Repository structure | Value |
| ------------------------- | ------ |
| * References | |
| * Count | 0 |
| * Branches | 0 |
| * Tags | 0 |
| * Remotes | 0 |
| * Others | 0 |
| | |
| * Reachable objects | |
| * Count | 0 |
| * Commits | 0 |
| * Trees | 0 |
| * Blobs | 0 |
| * Tags | 0 |
| * Inflated size | 0 B |
| * Commits | 0 B |
| * Trees | 0 B |
| * Blobs | 0 B |
| * Tags | 0 B |
| * Disk size | 0 B |
| * Commits | 0 B |
| * Trees | 0 B |
| * Blobs | 0 B |
| * Tags | 0 B |
| | |
| * Largest objects | |
| * Commits | |
| * Maximum size | 0 B |
| * Maximum parents | 0 |
| * Trees | |
| * Maximum size | 0 B |
| * Blobs | |
| * Maximum size | 0 B |
| * Tags | |
| * Maximum size | 0 B |
EOF
git repo structure >out 2>err &&
@@ -89,46 +90,48 @@ test_expect_success SHA1 'repository with references and objects' '
# git-rev-list(1) --disk-usage=human option printing the full
# "byte/bytes" unit string instead of just "B".
cat >expect <<-EOF &&
| Repository structure | Value |
| ------------------------ | ---------- |
| * References | |
| * Count | 4 |
| * Branches | 1 |
| * Tags | 1 |
| * Remotes | 1 |
| * Others | 1 |
| | |
| * Reachable objects | |
| * Count | 3.02 k |
| * Commits | 1.01 k |
| * Trees | 1.01 k |
| * Blobs | 1.01 k |
| * Tags | 1 |
| * Inflated size | 16.03 MiB |
| * Commits | 217.92 KiB |
| * Trees | 15.81 MiB |
| * Blobs | 11.68 KiB |
| * Tags | 132 B |
| * Disk size | $(object_type_disk_usage all true) |
| * Commits | $(object_type_disk_usage commit true) |
| * Trees | $(object_type_disk_usage tree true) |
| * Blobs | $(object_type_disk_usage blob true) |
| * Tags | $(object_type_disk_usage tag) B |
| | |
| * Largest objects | |
| * Commits | |
| * Maximum size [1] | 223 B |
| * Trees | |
| * Maximum size [2] | 32.29 KiB |
| * Blobs | |
| * Maximum size [3] | 13 B |
| * Tags | |
| * Maximum size [4] | 132 B |
| Repository structure | Value |
| ------------------------- | ---------- |
| * References | |
| * Count | 4 |
| * Branches | 1 |
| * Tags | 1 |
| * Remotes | 1 |
| * Others | 1 |
| | |
| * Reachable objects | |
| * Count | 3.02 k |
| * Commits | 1.01 k |
| * Trees | 1.01 k |
| * Blobs | 1.01 k |
| * Tags | 1 |
| * Inflated size | 16.03 MiB |
| * Commits | 217.92 KiB |
| * Trees | 15.81 MiB |
| * Blobs | 11.68 KiB |
| * Tags | 132 B |
| * Disk size | $(object_type_disk_usage all true) |
| * Commits | $(object_type_disk_usage commit true) |
| * Trees | $(object_type_disk_usage tree true) |
| * Blobs | $(object_type_disk_usage blob true) |
| * Tags | $(object_type_disk_usage tag) B |
| | |
| * Largest objects | |
| * Commits | |
| * Maximum size [1] | 223 B |
| * Maximum parents [2] | 1 |
| * Trees | |
| * Maximum size [3] | 32.29 KiB |
| * Blobs | |
| * Maximum size [4] | 13 B |
| * Tags | |
| * Maximum size [5] | 132 B |
[1] 0dc91eb18580102a3a216c8bfecedeba2b9f9b9a
[2] 60665251ab71dbd8c18d9bf2174f4ee0d58aa06c
[3] 97d808e45116bf02103490294d3d46dad7a2ac62
[4] 4dae4f5954f5e6feb3577cfb1b181daa3fd3afd2
[2] 0dc91eb18580102a3a216c8bfecedeba2b9f9b9a
[3] 60665251ab71dbd8c18d9bf2174f4ee0d58aa06c
[4] 97d808e45116bf02103490294d3d46dad7a2ac62
[5] 4dae4f5954f5e6feb3577cfb1b181daa3fd3afd2
EOF
git repo structure >out 2>err &&
@@ -171,6 +174,8 @@ test_expect_success SHA1 'keyvalue and nul format' '
objects.blobs.max_size_oid=eaeeedced46482bd4281fda5a5f05ce24854151f
objects.tags.max_size=132
objects.tags.max_size_oid=1ee0f2b16ea37d895dbe9dbd76cd2ac70446176c
objects.commits.max_parents=1
objects.commits.max_parents_oid=de3508174b5c2ace6993da67cae9be9069e2df39
EOF
git repo structure --format=keyvalue >out 2>err &&