@@ -85,6 +85,24 @@ loose-objects::
advisable to enable both the `loose-objects` and `gc` tasks at the
same time.
+incremental-repack::
+ The `incremental-repack` job repacks the object directory
+ using the `multi-pack-index` feature. In order to prevent race
+ conditions with concurrent Git commands, it follows a two-step
+ process. First, it calls `git multi-pack-index expire` to delete
+ pack-files unreferenced by the `multi-pack-index` file. Second, it
+ calls `git multi-pack-index repack` to select several small
+ pack-files and repack them into a bigger one, and then update the
+ `multi-pack-index` entries that refer to the small pack-files to
+ refer to the new pack-file. This prepares those small pack-files
+ for deletion upon the next run of `git multi-pack-index expire`.
+ The selection of the small pack-files is such that the expected
+ size of the big pack-file is at least the batch size; see the
+ `--batch-size` option for the `repack` subcommand in
+ linkgit:git-multi-pack-index[1]. The default batch-size is zero,
+ which is a special case that attempts to repack all pack-files
+ into a single pack-file.
+
OPTIONS
-------
--auto::
@@ -1001,6 +1001,77 @@ static int maintenance_task_loose_objects(struct maintenance_run_opts *opts)
return prune_packed(opts) || pack_loose(opts);
}
+static int multi_pack_index_write(struct maintenance_run_opts *opts)
+{
+ struct child_process child = CHILD_PROCESS_INIT;
+
+ child.git_cmd = 1;
+ strvec_pushl(&child.args, "multi-pack-index", "write", NULL);
+
+ if (opts->quiet)
+ strvec_push(&child.args, "--no-progress");
+
+ if (run_command(&child))
+ return error(_("failed to write multi-pack-index"));
+
+ return 0;
+}
+
+static int multi_pack_index_expire(struct maintenance_run_opts *opts)
+{
+ struct child_process child = CHILD_PROCESS_INIT;
+
+ child.git_cmd = 1;
+ strvec_pushl(&child.args, "multi-pack-index", "expire", NULL);
+
+ if (opts->quiet)
+ strvec_push(&child.args, "--no-progress");
+
+ close_object_store(the_repository->objects);
+
+ if (run_command(&child))
+ return error(_("'git multi-pack-index expire' failed"));
+
+ return 0;
+}
+
+static int multi_pack_index_repack(struct maintenance_run_opts *opts)
+{
+ struct child_process child = CHILD_PROCESS_INIT;
+
+ child.git_cmd = 1;
+ strvec_pushl(&child.args, "multi-pack-index", "repack", NULL);
+
+ if (opts->quiet)
+ strvec_push(&child.args, "--no-progress");
+
+ strvec_push(&child.args, "--batch-size=0");
+
+ close_object_store(the_repository->objects);
+
+ if (run_command(&child))
+ return error(_("'git multi-pack-index repack' failed"));
+
+ return 0;
+}
+
+static int maintenance_task_incremental_repack(struct maintenance_run_opts *opts)
+{
+ prepare_repo_settings(the_repository);
+ if (!the_repository->settings.core_multi_pack_index) {
+ warning(_("skipping incremental-repack task because core.multiPackIndex is disabled"));
+ return 0;
+ }
+
+ if (multi_pack_index_write(opts))
+ return 1;
+ if (multi_pack_index_expire(opts))
+ return 1;
+ if (multi_pack_index_repack(opts))
+ return 1;
+ return 0;
+}
+
typedef int maintenance_task_fn(struct maintenance_run_opts *opts);
/*
@@ -1023,6 +1094,7 @@ struct maintenance_task {
enum maintenance_task_label {
TASK_PREFETCH,
TASK_LOOSE_OBJECTS,
+ TASK_INCREMENTAL_REPACK,
TASK_GC,
TASK_COMMIT_GRAPH,
@@ -1040,6 +1112,10 @@ static struct maintenance_task tasks[] = {
maintenance_task_loose_objects,
loose_object_auto_condition,
},
+ [TASK_INCREMENTAL_REPACK] = {
+ "incremental-repack",
+ maintenance_task_incremental_repack,
+ },
[TASK_GC] = {
"gc",
maintenance_task_gc,
@@ -3,6 +3,7 @@
test_description='multi-pack-indexes'
. ./test-lib.sh
+GIT_TEST_MULTI_PACK_INDEX=0
objdir=.git/objects
midx_read_expect () {
@@ -5,6 +5,7 @@ test_description='git maintenance builtin'
. ./test-lib.sh
GIT_TEST_COMMIT_GRAPH=0
+GIT_TEST_MULTI_PACK_INDEX=0
test_expect_success 'help text' '
test_expect_code 129 git maintenance -h 2>err &&
@@ -149,4 +150,41 @@ test_expect_success 'maintenance.loose-objects.auto' '
test_subcommand git prune-packed --quiet <trace-loC
'
+test_expect_success 'incremental-repack task' '
+ packDir=.git/objects/pack &&
+ for i in $(test_seq 1 5)
+ do
+ test_commit $i || return 1
+ done &&
+
+ # Create three disjoint pack-files with size BIG, small, small.
+ echo HEAD~2 | git pack-objects --revs $packDir/test-1 &&
+ test_tick &&
+ git pack-objects --revs $packDir/test-2 <<-\EOF &&
+ HEAD~1
+ ^HEAD~2
+ EOF
+ test_tick &&
+ git pack-objects --revs $packDir/test-3 <<-\EOF &&
+ HEAD
+ ^HEAD~1
+ EOF
+ rm -f $packDir/pack-* &&
+ rm -f $packDir/loose-* &&
+ ls $packDir/*.pack >packs-before &&
+ test_line_count = 3 packs-before &&
+
+ # the job repacks the two into a new pack, but does not
+ # delete the old ones.
+ git maintenance run --task=incremental-repack &&
+ ls $packDir/*.pack >packs-between &&
+ test_line_count = 4 packs-between &&
+
+ # the job deletes the two old packs, and does not write
+ # a new one because only one pack remains.
+ git maintenance run --task=incremental-repack &&
+ ls .git/objects/pack/*.pack >packs-after &&
+ test_line_count = 1 packs-after
+'
+
test_done