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git-send-pack: start parsing local/remote reference differences

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Right now it just shows which refs it picks up, and whether they are
the same or changed on the remote end. Getting there..
This commit is contained in:
Linus Torvalds 2005-06-29 22:31:41 -07:00
parent 1a3e71767c
commit e4b5c7fff4
1 changed files with 58 additions and 3 deletions
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61
send-pack.c
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@ -5,18 +5,73 @@ static const char send_pack_usage[] = "git-send-pack [--exec=other] destination
static const char *exec = "git-receive-pack";
struct ref {
struct ref *next;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
char name[0];
};
static struct ref *ref_list = NULL;
static int read_ref(const char *ref, unsigned char *sha1)
{
int fd, ret;
static char pathname[PATH_MAX];
char buffer[60];
const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
snprintf(pathname, sizeof(pathname), "%s/%s", git_dir, ref);
fd = open(pathname, O_RDONLY);
if (fd < 0)
return -1;
ret = -1;
if (read(fd, buffer, sizeof(buffer)) >= 40)
ret = get_sha1_hex(buffer, sha1);
close(fd);
return ret;
}
static int send_pack(int in, int out)
{
for (;;) {
unsigned char old_sha1[20];
unsigned char new_sha1[20];
static char buffer[1000];
char *name;
struct ref *n;
int len;
len = packet_read_line(in, buffer, sizeof(buffer));
if (len > 0) {
write(2, buffer, len);
if (!len)
break;
if (buffer[len-1] == '\n')
buffer[--len] = 0;
if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
die("protocol error: expected sha/ref, got '%s'", buffer);
name = buffer + 41;
if (read_ref(name, new_sha1) < 0) {
fprintf(stderr, "no such local reference '%s'\n", name);
continue;
}
break;
if (!has_sha1_file(old_sha1)) {
fprintf(stderr, "remote '%s' points to object I don't have\n", name);
continue;
}
if (!memcmp(old_sha1, new_sha1, 20)) {
fprintf(stderr, "'%s' unchanged\n", name);
} else {
char new_hex[60];
strcpy(new_hex, sha1_to_hex(new_sha1));
fprintf(stderr, "%s: updating from %s to %s\n", name, sha1_to_hex(old_sha1), new_hex);
}
n = xmalloc(sizeof(*n) + len - 40);
memcpy(n->old_sha1, old_sha1, 20);
memcpy(n->new_sha1, new_sha1, 20);
memcpy(n->name, buffer + 41, len - 40);
n->next = ref_list;
ref_list = n;
}
packet_flush(out);
close(out);