From 2dacf26d0985521c0f30e535963a45257b63ea21 Mon Sep 17 00:00:00 2001 From: "brian m. carlson" Date: Wed, 24 Dec 2014 23:05:40 +0000 Subject: [PATCH] pack-objects: use --objects-edge-aggressive for shallow repos 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 Signed-off-by: Junio C Hamano --- Documentation/git-pack-objects.txt | 7 ++++++- Documentation/rev-list-options.txt | 3 ++- builtin/pack-objects.c | 7 ++++++- send-pack.c | 3 +++ upload-pack.c | 4 +++- 5 files changed, 20 insertions(+), 4 deletions(-) diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt index d2d8f4792a..c2f76fb1ea 100644 --- a/Documentation/git-pack-objects.txt +++ b/Documentation/git-pack-objects.txt @@ -13,7 +13,7 @@ SYNOPSIS [--no-reuse-delta] [--delta-base-offset] [--non-empty] [--local] [--incremental] [--window=] [--depth=] [--revs [--unpacked | --all]] [--stdout | base-name] - [--keep-true-parents] < object-list + [--shallow] [--keep-true-parents] < object-list DESCRIPTION @@ -190,6 +190,11 @@ required objects and is thus unusable by Git without making it self-contained. Use `git index-pack --fix-thin` (see linkgit:git-index-pack[1]) to restore the self-contained property. +--shallow:: + Optimize a pack that will be provided to a client with a shallow + repository. This option, combined with \--thin, can result in a + smaller pack at the cost of speed. + --delta-base-offset:: A packed archive can express the base object of a delta as either a 20-byte object name or as an offset in the diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt index 8cb6f92e19..2984f407a9 100644 --- a/Documentation/rev-list-options.txt +++ b/Documentation/rev-list-options.txt @@ -659,7 +659,8 @@ These options are mostly targeted for packing of Git repositories. --objects-edge-aggressive:: Similar to `--objects-edge`, but it tries harder to find excluded - commits at the cost of increased time. + commits at the cost of increased time. This is used instead of + `--objects-edge` to build ``thin'' packs for shallow repositories. --unpacked:: Only useful with `--objects`; print the object IDs that are not diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c index f93a17c465..d8165878e1 100644 --- a/builtin/pack-objects.c +++ b/builtin/pack-objects.c @@ -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"); diff --git a/send-pack.c b/send-pack.c index 949cb61aa0..25947d7df9 100644 --- a/send-pack.c +++ b/send-pack.c @@ -47,6 +47,7 @@ static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, stru NULL, NULL, NULL, + NULL, }; struct child_process po = CHILD_PROCESS_INIT; int i; @@ -60,6 +61,8 @@ static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, stru argv[i++] = "-q"; if (args->progress) argv[i++] = "--progress"; + if (is_repository_shallow()) + argv[i++] = "--shallow"; po.argv = argv; po.in = -1; po.out = args->stateless_rpc ? -1 : fd; diff --git a/upload-pack.c b/upload-pack.c index ac9ac1592d..b531a325d2 100644 --- a/upload-pack.c +++ b/upload-pack.c @@ -86,7 +86,7 @@ static void create_pack_file(void) "corruption on the remote side."; int buffered = -1; ssize_t sz; - const char *argv[12]; + const char *argv[13]; int i, arg = 0; FILE *pipe_fd; @@ -100,6 +100,8 @@ static void create_pack_file(void) argv[arg++] = "--thin"; argv[arg++] = "--stdout"; + if (shallow_nr) + argv[arg++] = "--shallow"; if (!no_progress) argv[arg++] = "--progress"; if (use_ofs_delta) -- 2.11.4.GIT