mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![Petr Baudis](/assets/img/avatar_default.png)
Currently it's a bit weird that pull() takes a single argument describing the commit but takes the write_ref from a global variable. This makes it take that as a parameter as well, which might be nicer for the libification in the future, but especially it will make for nicer code when we implement pull()ing multiple commits at once. Signed-off-by: Petr Baudis <pasky@suse.cz> Signed-off-by: Junio C Hamano <junkio@cox.net>
175 lines
3.6 KiB
C
175 lines
3.6 KiB
C
#ifndef COUNTERPART_ENV_NAME
|
|
#define COUNTERPART_ENV_NAME "GIT_SSH_UPLOAD"
|
|
#endif
|
|
#ifndef COUNTERPART_PROGRAM_NAME
|
|
#define COUNTERPART_PROGRAM_NAME "git-ssh-upload"
|
|
#endif
|
|
#ifndef MY_PROGRAM_NAME
|
|
#define MY_PROGRAM_NAME "git-ssh-fetch"
|
|
#endif
|
|
|
|
#include "cache.h"
|
|
#include "commit.h"
|
|
#include "rsh.h"
|
|
#include "fetch.h"
|
|
#include "refs.h"
|
|
|
|
static int fd_in;
|
|
static int fd_out;
|
|
|
|
static unsigned char remote_version = 0;
|
|
static unsigned char local_version = 1;
|
|
|
|
static ssize_t force_write(int fd, void *buffer, size_t length)
|
|
{
|
|
ssize_t ret = 0;
|
|
while (ret < length) {
|
|
ssize_t size = write(fd, (char *) buffer + ret, length - ret);
|
|
if (size < 0) {
|
|
return size;
|
|
}
|
|
if (size == 0) {
|
|
return ret;
|
|
}
|
|
ret += size;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int prefetches = 0;
|
|
|
|
static struct object_list *in_transit = NULL;
|
|
static struct object_list **end_of_transit = &in_transit;
|
|
|
|
void prefetch(unsigned char *sha1)
|
|
{
|
|
char type = 'o';
|
|
struct object_list *node;
|
|
if (prefetches > 100) {
|
|
fetch(in_transit->item->sha1);
|
|
}
|
|
node = xmalloc(sizeof(struct object_list));
|
|
node->next = NULL;
|
|
node->item = lookup_unknown_object(sha1);
|
|
*end_of_transit = node;
|
|
end_of_transit = &node->next;
|
|
force_write(fd_out, &type, 1);
|
|
force_write(fd_out, sha1, 20);
|
|
prefetches++;
|
|
}
|
|
|
|
static char conn_buf[4096];
|
|
static size_t conn_buf_posn = 0;
|
|
|
|
int fetch(unsigned char *sha1)
|
|
{
|
|
int ret;
|
|
signed char remote;
|
|
struct object_list *temp;
|
|
|
|
if (memcmp(sha1, in_transit->item->sha1, 20)) {
|
|
/* we must have already fetched it to clean the queue */
|
|
return has_sha1_file(sha1) ? 0 : -1;
|
|
}
|
|
prefetches--;
|
|
temp = in_transit;
|
|
in_transit = in_transit->next;
|
|
if (!in_transit)
|
|
end_of_transit = &in_transit;
|
|
free(temp);
|
|
|
|
if (conn_buf_posn) {
|
|
remote = conn_buf[0];
|
|
memmove(conn_buf, conn_buf + 1, --conn_buf_posn);
|
|
} else {
|
|
if (read(fd_in, &remote, 1) < 1)
|
|
return -1;
|
|
}
|
|
/* fprintf(stderr, "Got %d\n", remote); */
|
|
if (remote < 0)
|
|
return remote;
|
|
ret = write_sha1_from_fd(sha1, fd_in, conn_buf, 4096, &conn_buf_posn);
|
|
if (!ret)
|
|
pull_say("got %s\n", sha1_to_hex(sha1));
|
|
return ret;
|
|
}
|
|
|
|
static int get_version(void)
|
|
{
|
|
char type = 'v';
|
|
write(fd_out, &type, 1);
|
|
write(fd_out, &local_version, 1);
|
|
if (read(fd_in, &remote_version, 1) < 1) {
|
|
return error("Couldn't read version from remote end");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int fetch_ref(char *ref, unsigned char *sha1)
|
|
{
|
|
signed char remote;
|
|
char type = 'r';
|
|
write(fd_out, &type, 1);
|
|
write(fd_out, ref, strlen(ref) + 1);
|
|
read(fd_in, &remote, 1);
|
|
if (remote < 0)
|
|
return remote;
|
|
read(fd_in, sha1, 20);
|
|
return 0;
|
|
}
|
|
|
|
static const char ssh_fetch_usage[] =
|
|
MY_PROGRAM_NAME
|
|
" [-c] [-t] [-a] [-v] [--recover] [-w ref] commit-id url";
|
|
int main(int argc, char **argv)
|
|
{
|
|
const char *write_ref = NULL;
|
|
char *commit_id;
|
|
char *url;
|
|
int arg = 1;
|
|
const char *prog;
|
|
|
|
prog = getenv("GIT_SSH_PUSH");
|
|
if (!prog) prog = "git-ssh-upload";
|
|
|
|
setup_git_directory();
|
|
git_config(git_default_config);
|
|
|
|
while (arg < argc && argv[arg][0] == '-') {
|
|
if (argv[arg][1] == 't') {
|
|
get_tree = 1;
|
|
} else if (argv[arg][1] == 'c') {
|
|
get_history = 1;
|
|
} else if (argv[arg][1] == 'a') {
|
|
get_all = 1;
|
|
get_tree = 1;
|
|
get_history = 1;
|
|
} else if (argv[arg][1] == 'v') {
|
|
get_verbosely = 1;
|
|
} else if (argv[arg][1] == 'w') {
|
|
write_ref = argv[arg + 1];
|
|
arg++;
|
|
} else if (!strcmp(argv[arg], "--recover")) {
|
|
get_recover = 1;
|
|
}
|
|
arg++;
|
|
}
|
|
if (argc < arg + 2) {
|
|
usage(ssh_fetch_usage);
|
|
return 1;
|
|
}
|
|
commit_id = argv[arg];
|
|
url = argv[arg + 1];
|
|
|
|
if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
|
|
return 1;
|
|
|
|
if (get_version())
|
|
return 1;
|
|
|
|
if (pull(commit_id, write_ref, url))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|