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git-fetch-pack: Support multi_ack extension

Browse source 
The client side support for multi_ack.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Johannes Schindelin 2005-10-28 04:50:26 +02:00 committed by Junio C Hamano
parent 1bd8c8f00b
commit c4c86f07d0
2 changed files with 46 additions and 17 deletions
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5
connect.c
View file

@ -73,8 +73,11 @@ int get_ack(int fd, unsigned char *result_sha1)
if (!strcmp(line, "NAK"))
return 0;
if (!strncmp(line, "ACK ", 3)) {
if (!get_sha1_hex(line+4, result_sha1))
if (!get_sha1_hex(line+4, result_sha1)) {
if (strstr(line+45, "continue"))
return 2;
return 1;
}
}
die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
}

58
fetch-pack.c
View file

@ -19,7 +19,7 @@ static const char *exec = "git-upload-pack";
#define POPPED (1U << 4)
static struct commit_list *rev_list = NULL;
static int non_common_revs = 0;
static int non_common_revs = 0, multi_ack = 0;
static void rev_list_push(struct commit *commit, int mark)
{
@ -157,7 +157,8 @@ static int find_common(int fd[2], unsigned char *result_sha1,
continue;
}
packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
packet_write(fd[1], "want %s%s\n", sha1_to_hex(remote),
multi_ack ? " multi_ack" : "");
fetching++;
}
packet_flush(fd[1]);
@ -171,6 +172,8 @@ static int find_common(int fd[2], unsigned char *result_sha1,
if (verbose)
fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
if (!(31 & ++count)) {
int ack;
packet_flush(fd[1]);
flushes++;
@ -180,29 +183,47 @@ static int find_common(int fd[2], unsigned char *result_sha1,
*/
if (count == 32)
continue;
if (get_ack(fd[0], result_sha1)) {
flushes = 0;
retval = 0;
if (verbose)
fprintf(stderr, "got ack\n");
break;
}
do {
ack = get_ack(fd[0], result_sha1);
if (verbose && ack)
fprintf(stderr, "got ack %d %s\n", ack,
sha1_to_hex(result_sha1));
if (ack == 1) {
flushes = 0;
multi_ack = 0;
retval = 0;
goto done;
} else if (ack == 2) {
struct commit *commit =
lookup_commit(result_sha1);
mark_common(commit, 0, 1);
retval = 0;
}
} while (ack);
flushes--;
}
}
done:
packet_write(fd[1], "done\n");
if (verbose)
fprintf(stderr, "done\n");
if (retval != 0)
if (retval != 0) {
multi_ack = 0;
flushes++;
while (flushes) {
flushes--;
if (get_ack(fd[0], result_sha1)) {
}
while (flushes || multi_ack) {
int ack = get_ack(fd[0], result_sha1);
if (ack) {
if (verbose)
fprintf(stderr, "got ack\n");
return 0;
fprintf(stderr, "got ack (%d) %s\n", ack,
sha1_to_hex(result_sha1));
if (ack == 1)
return 0;
multi_ack = 1;
continue;
}
flushes--;
}
return retval;
}
@ -344,6 +365,11 @@ static int fetch_pack(int fd[2], int nr_match, char **match)
pid_t pid;
get_remote_heads(fd[0], &ref, 0, NULL, 0);
if (server_supports("multi_ack")) {
if (verbose)
fprintf(stderr, "Server supports multi_ack\n");
multi_ack = 1;
}
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");