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pack-objects: use --objects-edge-aggressive for shallow repos

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When fetching into or pushing from a shallow repository, we want to
aggressively mark edges as uninteresting, since this decreases the pack
size.  However, aggressively marking edges can negatively affect
performance on large non-shallow repositories with lots of refs.

Teach pack-objects a --shallow option to indicate that we're pushing
from or fetching into a shallow repository.  Use
--objects-edge-aggressive only for shallow repositories and otherwise
use --objects-edge, which performs better in the general case.  Update
the callers to pass the --shallow option when they are dealing with a
shallow repository.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson
2014-12-24 23:05:40 +00:00
committed by Junio C Hamano
parent 1684c1b219
commit 2dacf26d09
5 changed files with 20 additions and 4 deletions
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7
builtin/pack-objects.c
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@ -2613,6 +2613,7 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
{
int use_internal_rev_list = 0;
int thin = 0;
int shallow = 0;
int all_progress_implied = 0;
struct argv_array rp = ARGV_ARRAY_INIT;
int rev_list_unpacked = 0, rev_list_all = 0, rev_list_reflog = 0;
@ -2677,6 +2678,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
PARSE_OPT_OPTARG, option_parse_unpack_unreachable },
OPT_BOOL(0, "thin", &thin,
N_("create thin packs")),
OPT_BOOL(0, "shallow", &shallow,
N_("create packs suitable for shallow fetches")),
OPT_BOOL(0, "honor-pack-keep", &ignore_packed_keep,
N_("ignore packs that have companion .keep file")),
OPT_INTEGER(0, "compression", &pack_compression_level,
@ -2711,7 +2714,9 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
argv_array_push(&rp, "pack-objects");
if (thin) {
use_internal_rev_list = 1;
argv_array_push(&rp, "--objects-edge-aggressive");
argv_array_push(&rp, shallow
? "--objects-edge-aggressive"
: "--objects-edge");
} else
argv_array_push(&rp, "--objects");