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let the GIT native protocol use offsets to delta base when possible

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There is no reason not to always do this when both ends agree.
Therefore a client that can accept offsets to delta base always sends
the "ofs-delta" flag.  The server will stream a pack with or without
offset to delta base depending on whether that flag is provided or not
with no additional cost.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Nicolas Pitre 2006-09-26 11:27:39 -04:00 committed by Junio C Hamano
parent 780e6e735b
commit e4fe4b8ef7
2 changed files with 10 additions and 5 deletions
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5
fetch-pack.c
View File

@ -166,12 +166,13 @@ static int find_common(int fd[2], unsigned char *result_sha1,
}
if (!fetching)
packet_write(fd[1], "want %s%s%s%s%s\n",
packet_write(fd[1], "want %s%s%s%s%s%s\n",
sha1_to_hex(remote),
(multi_ack ? " multi_ack" : ""),
(use_sideband == 2 ? " side-band-64k" : ""),
(use_sideband == 1 ? " side-band" : ""),
(use_thin_pack ? " thin-pack" : ""));
(use_thin_pack ? " thin-pack" : ""),
" ofs-delta");
else
packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
fetching++;

10
upload-pack.c
View File

@ -16,7 +16,7 @@ static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=n
#define OUR_REF (1U << 1)
#define WANTED (1U << 2)
static int multi_ack, nr_our_refs;
static int use_thin_pack;
static int use_thin_pack, use_ofs_delta;
static struct object_array have_obj;
static struct object_array want_obj;
static unsigned int timeout;
@ -137,7 +137,9 @@ static void create_pack_file(void)
close(pu_pipe[1]);
close(pe_pipe[0]);
close(pe_pipe[1]);
execl_git_cmd("pack-objects", "--stdout", "--progress", NULL);
execl_git_cmd("pack-objects", "--stdout", "--progress",
use_ofs_delta ? "--delta-base-offset" : NULL,
NULL);
kill(pid_rev_list, SIGKILL);
die("git-upload-pack: unable to exec git-pack-objects");
}
@ -393,6 +395,8 @@ static void receive_needs(void)
multi_ack = 1;
if (strstr(line+45, "thin-pack"))
use_thin_pack = 1;
if (strstr(line+45, "ofs-delta"))
use_ofs_delta = 1;
if (strstr(line+45, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
else if (strstr(line+45, "side-band"))
@ -418,7 +422,7 @@ static void receive_needs(void)
static int send_ref(const char *refname, const unsigned char *sha1)
{
static const char *capabilities = "multi_ack thin-pack side-band side-band-64k";
static const char *capabilities = "multi_ack thin-pack side-band side-band-64k ofs-delta";
struct object *o = parse_object(sha1);
if (!o)