int cmd_upload_archive(int argc, const char **argv, const char *prefix)
{
const char *sent_argv[MAX_ARGS];
struct child_process cld = { sent_argv };
cld.out = cld.err = -1;
cld.git_cmd = 1;
if (argc != 2)
usage(upload_archive_usage);
if (!enter_repo(argv[1], 0))
die("'%s' does not appear to be a git repository", argv[1]);
prepare_argv(sent_argv, argv);
if (start_command(&cld)) {
int err = errno;
packet_write(1, "NACK fork failed on the remote side\n");
die("upload-archive: %s", strerror(err));
}
/* parent - read from child, multiplex and send out to fd#1 */
packet_write(1, "ACK\n");
packet_flush(1);
while (1) {
struct pollfd pfd[2];
int status;
pfd[0].fd = cld.out;
pfd[0].events = POLLIN;
pfd[1].fd = cld.err;
pfd[1].events = POLLIN;
if (poll(pfd, 2, -1) < 0) {
if (errno != EINTR) {
error("poll failed resuming: %s",
strerror(errno));
sleep(1);
}
continue;
}
if (pfd[1].revents & POLLIN)
/* Status stream ready */
if (process_input(pfd[1].fd, 2))
continue;
if (pfd[0].revents & POLLIN)
/* Data stream ready */
if (process_input(pfd[0].fd, 1))
continue;
if (waitpid(cld.pid, &status, 0) < 0)
error_clnt("%s", lostchild);
else if (!WIFEXITED(status) || WEXITSTATUS(status) > 0)
error_clnt("%s", deadchild);
packet_flush(1);
break;
}
return 0;
}
static struct ref *do_fetch_pack(int fd[2],
const struct ref *orig_ref,
int nr_match,
char **match,
char **pack_lockfile)
{
struct ref *ref = copy_ref_list(orig_ref);
unsigned char sha1[20];
if (is_repository_shallow() && !server_supports("shallow"))
die("Server does not support shallow clients");
if (server_supports("multi_ack_detailed")) {
if (args.verbose)
fprintf(stderr, "Server supports multi_ack_detailed\n");
multi_ack = 2;
}
else if (server_supports("multi_ack")) {
if (args.verbose)
fprintf(stderr, "Server supports multi_ack\n");
multi_ack = 1;
}
if (server_supports("side-band-64k")) {
if (args.verbose)
fprintf(stderr, "Server supports side-band-64k\n");
use_sideband = 2;
}
else if (server_supports("side-band")) {
if (args.verbose)
fprintf(stderr, "Server supports side-band\n");
use_sideband = 1;
}
if (server_supports("ofs-delta")) {
if (args.verbose)
fprintf(stderr, "Server supports ofs-delta\n");
} else
prefer_ofs_delta = 0;
if (everything_local(&ref, nr_match, match)) {
packet_flush(fd[1]);
goto all_done;
}
if (find_common(fd, sha1, ref) < 0)
if (!args.keep_pack)
/* When cloning, it is not unusual to have
* no common commit.
*/
warning("no common commits");
if (args.stateless_rpc)
packet_flush(fd[1]);
if (get_pack(fd, pack_lockfile))
die("git fetch-pack: fetch failed.");
all_done:
return ref;
}
int cmd_upload_archive(int argc, const char **argv, const char *prefix)
{
struct child_process writer = { argv };
/*
* Set up sideband subprocess.
*
* We (parent) monitor and read from child, sending its fd#1 and fd#2
* multiplexed out to our fd#1. If the child dies, we tell the other
* end over channel #3.
*/
argv[0] = "upload-archive--writer";
writer.out = writer.err = -1;
writer.git_cmd = 1;
if (start_command(&writer)) {
int err = errno;
packet_write(1, "NACK unable to spawn subprocess\n");
die("upload-archive: %s", strerror(err));
}
packet_write(1, "ACK\n");
packet_flush(1);
while (1) {
struct pollfd pfd[2];
pfd[0].fd = writer.out;
pfd[0].events = POLLIN;
pfd[1].fd = writer.err;
pfd[1].events = POLLIN;
if (poll(pfd, 2, -1) < 0) {
if (errno != EINTR) {
error("poll failed resuming: %s",
strerror(errno));
sleep(1);
}
continue;
}
if (pfd[1].revents & POLLIN)
/* Status stream ready */
if (process_input(pfd[1].fd, 2))
continue;
if (pfd[0].revents & POLLIN)
/* Data stream ready */
if (process_input(pfd[0].fd, 1))
continue;
if (finish_command(&writer))
error_clnt("%s", deadchild);
packet_flush(1);
break;
}
return 0;
}
struct ref *fetch_pack(struct fetch_pack_args *args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
struct ref **sought, int nr_sought,
struct sha1_array *shallow,
char **pack_lockfile)
{
struct ref *ref_cpy;
struct shallow_info si;
fetch_pack_setup();
if (nr_sought)
nr_sought = remove_duplicates_in_refs(sought, nr_sought);
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
}
prepare_shallow_info(&si, shallow);
ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
&si, pack_lockfile);
reprepare_packed_git();
update_shallow(args, sought, nr_sought, &si);
clear_shallow_info(&si);
return ref_cpy;
}
static void upload_pack(void)
{
struct string_list symref = STRING_LIST_INIT_DUP;
head_ref_namespaced(find_symref, &symref);
if (advertise_refs || !stateless_rpc) {
reset_timeout();
head_ref_namespaced(send_ref, &symref);
for_each_namespaced_ref(send_ref, &symref);
advertise_shallow_grafts(1);
packet_flush(1);
} else {
head_ref_namespaced(mark_our_ref, NULL);
for_each_namespaced_ref(mark_our_ref, NULL);
}
string_list_clear(&symref, 1);
if (advertise_refs)
return;
receive_needs();
if (want_obj.nr) {
get_common_commits();
create_pack_file();
}
}
void upload_pack(struct upload_pack_options *options)
{
struct string_list symref = STRING_LIST_INIT_DUP;
stateless_rpc = options->stateless_rpc;
timeout = options->timeout;
daemon_mode = options->daemon_mode;
git_config(upload_pack_config, NULL);
head_ref_namespaced(find_symref, &symref);
if (options->advertise_refs || !stateless_rpc) {
reset_timeout();
head_ref_namespaced(send_ref, &symref);
for_each_namespaced_ref(send_ref, &symref);
advertise_shallow_grafts(1);
packet_flush(1);
} else {
head_ref_namespaced(check_ref, NULL);
for_each_namespaced_ref(check_ref, NULL);
}
string_list_clear(&symref, 1);
if (options->advertise_refs)
return;
receive_needs();
if (want_obj.nr) {
get_common_commits();
create_pack_file();
}
}
static void deepen(int depth, int deepen_relative,
struct object_array *shallows)
{
if (depth == INFINITE_DEPTH && !is_repository_shallow()) {
int i;
for (i = 0; i < shallows->nr; i++) {
struct object *object = shallows->objects[i].item;
object->flags |= NOT_SHALLOW;
}
} else if (deepen_relative) {
struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
struct commit_list *result;
get_reachable_list(shallows, &reachable_shallows);
result = get_shallow_commits(&reachable_shallows,
depth + 1,
SHALLOW, NOT_SHALLOW);
send_shallow(result);
free_commit_list(result);
object_array_clear(&reachable_shallows);
} else {
struct commit_list *result;
result = get_shallow_commits(&want_obj, depth,
SHALLOW, NOT_SHALLOW);
send_shallow(result);
free_commit_list(result);
}
send_unshallow(shallows);
packet_flush(1);
}
static void get_info_refs(char *arg)
{
const char *service_name = get_parameter("service");
struct strbuf buf = STRBUF_INIT;
hdr_nocache();
if (service_name) {
const char *argv[] = {NULL /* service name */,
"--stateless-rpc", "--advertise-refs",
".", NULL};
struct rpc_service *svc = select_service(service_name);
strbuf_addf(&buf, "application/x-git-%s-advertisement",
svc->name);
hdr_str(content_type, buf.buf);
end_headers();
packet_write(1, "# service=git-%s\n", svc->name);
packet_flush(1);
argv[0] = svc->name;
run_service(argv);
} else {
select_getanyfile();
for_each_namespaced_ref(show_text_ref, &buf);
send_strbuf("text/plain", &buf);
}
strbuf_release(&buf);
}
struct ref *fetch_pack(struct fetch_pack_args *args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
struct ref **sought, int nr_sought,
char **pack_lockfile)
{
struct ref *ref_cpy;
fetch_pack_setup();
if (nr_sought)
nr_sought = remove_duplicates_in_refs(sought, nr_sought);
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
}
ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, pack_lockfile);
if (args->depth > 0 && alternate_shallow_file) {
if (*alternate_shallow_file == '\0') { /* --unshallow */
unlink_or_warn(git_path("shallow"));
rollback_lock_file(&shallow_lock);
} else
commit_lock_file(&shallow_lock);
}
reprepare_packed_git();
return ref_cpy;
}
struct ref *fetch_pack(struct fetch_pack_args *my_args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
int nr_heads,
char **heads,
char **pack_lockfile)
{
struct stat st;
struct ref *ref_cpy;
fetch_pack_setup();
if (&args != my_args)
memcpy(&args, my_args, sizeof(args));
if (args.depth > 0) {
if (stat(git_path("shallow"), &st))
st.st_mtime = 0;
}
if (heads && nr_heads)
nr_heads = remove_duplicates(nr_heads, heads);
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
}
ref_cpy = do_fetch_pack(fd, ref, nr_heads, heads, pack_lockfile);
if (args.depth > 0) {
struct cache_time mtime;
struct strbuf sb = STRBUF_INIT;
char *shallow = git_path("shallow");
int fd;
mtime.sec = st.st_mtime;
mtime.nsec = ST_MTIME_NSEC(st);
if (stat(shallow, &st)) {
if (mtime.sec)
die("shallow file was removed during fetch");
} else if (st.st_mtime != mtime.sec
#ifdef USE_NSEC
|| ST_MTIME_NSEC(st) != mtime.nsec
#endif
)
die("shallow file was changed during fetch");
fd = hold_lock_file_for_update(&lock, shallow,
LOCK_DIE_ON_ERROR);
if (!write_shallow_commits(&sb, 0)
|| write_in_full(fd, sb.buf, sb.len) != sb.len) {
unlink_or_warn(shallow);
rollback_lock_file(&lock);
} else {
commit_lock_file(&lock);
}
strbuf_release(&sb);
}
reprepare_packed_git();
return ref_cpy;
}
static void send_request(int fd, struct strbuf *buf)
{
if (args.stateless_rpc) {
send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
packet_flush(fd);
} else
safe_write(fd, buf->buf, buf->len);
}
int cmd_receive_pack(int argc, const char **argv, const char *prefix)
{
int i;
char *dir = NULL;
argv++;
for (i = 1; i < argc; i++) {
const char *arg = *argv++;
if (*arg == '-') {
/* Do flag handling here */
usage(receive_pack_usage);
}
if (dir)
usage(receive_pack_usage);
dir = xstrdup(arg);
}
if (!dir)
usage(receive_pack_usage);
setup_path();
if (!enter_repo(dir, 0))
die("'%s': unable to chdir or not a git archive", dir);
if (is_repository_shallow())
die("attempt to push into a shallow repository");
git_config(receive_pack_config, NULL);
if (0 <= transfer_unpack_limit)
unpack_limit = transfer_unpack_limit;
else if (0 <= receive_unpack_limit)
unpack_limit = receive_unpack_limit;
add_alternate_refs();
write_head_info();
clear_extra_refs();
/* EOF */
packet_flush(1);
read_head_info();
if (commands) {
const char *unpack_status = NULL;
if (!delete_only(commands))
unpack_status = unpack();
execute_commands(unpack_status);
if (pack_lockfile)
unlink(pack_lockfile);
if (report_status)
report(unpack_status);
run_receive_hook(post_receive_hook);
run_update_post_hook(commands);
}
return 0;
}
struct ref *fetch_pack(struct fetch_pack_args *my_args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
int nr_heads,
char **heads,
char **pack_lockfile)
{
struct stat st;
struct ref *ref_cpy;
fetch_pack_setup();
memcpy(&args, my_args, sizeof(args));
if (args.depth > 0) {
if (stat(git_path("shallow"), &st))
st.st_mtime = 0;
}
if (heads && nr_heads)
nr_heads = remove_duplicates(nr_heads, heads);
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
}
ref_cpy = do_fetch_pack(fd, ref, nr_heads, heads, pack_lockfile);
if (args.depth > 0) {
struct cache_time mtime;
char *shallow = git_path("shallow");
int fd;
mtime.sec = st.st_mtime;
#ifdef USE_NSEC
mtime.usec = st.st_mtim.usec;
#endif
if (stat(shallow, &st)) {
if (mtime.sec)
die("shallow file was removed during fetch");
} else if (st.st_mtime != mtime.sec
#ifdef USE_NSEC
|| st.st_mtim.usec != mtime.usec
#endif
)
die("shallow file was changed during fetch");
fd = hold_lock_file_for_update(&lock, shallow, 1);
if (!write_shallow_commits(fd, 0)) {
unlink(shallow);
rollback_lock_file(&lock);
} else {
commit_lock_file(&lock);
}
}
reprepare_packed_git();
return ref_cpy;
}
static void send_request(struct fetch_pack_args *args,
int fd, struct strbuf *buf)
{
if (args->stateless_rpc) {
send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
packet_flush(fd);
} else
write_or_die(fd, buf->buf, buf->len);
}
static void deepen_by_rev_list(int ac, const char **av,
struct object_array *shallows)
{
struct commit_list *result;
result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
send_shallow(result);
free_commit_list(result);
send_unshallow(shallows);
packet_flush(1);
}
static void upload_pack(void)
{
reset_timeout();
head_ref(send_ref, NULL);
for_each_ref(send_ref, NULL);
packet_flush(1);
receive_needs();
if (want_obj.nr) {
get_common_commits();
create_pack_file();
}
}
/*
* Serialize the list of changes to the given file. The goal of this
* is to just serialize the key fields in wt_status so that a
* later command can rebuilt it and do the printing.
*
* We DO NOT include the contents of wt_status_state NOR
* current branch info. This info easily gets stale and
* is relatively quick for the status consumer to compute
* as necessary.
*/
void wt_status_serialize_v1(int fd, struct wt_status *s)
{
struct string_list_item *iter;
int k;
/*
* version header must be first line.
*/
packet_write_fmt(fd, "version 1\n");
wt_serialize_v1_header(s, fd);
if (s->change.nr > 0) {
packet_write_fmt(fd, "changed %d\n", s->change.nr);
for (k = 0; k < s->change.nr; k++) {
iter = &(s->change.items[k]);
wt_serialize_v1_changed(s, fd, iter);
}
packet_flush(fd);
}
if (s->untracked.nr > 0) {
packet_write_fmt(fd, "untracked %d\n", s->untracked.nr);
for (k = 0; k < s->untracked.nr; k++) {
iter = &(s->untracked.items[k]);
wt_serialize_v1_untracked(s, fd, iter);
}
packet_flush(fd);
}
if (s->ignored.nr > 0) {
packet_write_fmt(fd, "ignored %d\n", s->ignored.nr);
for (k = 0; k < s->ignored.nr; k++) {
iter = &(s->ignored.items[k]);
wt_serialize_v1_ignored(s, fd, iter);
}
packet_flush(fd);
}
}
static void write_head_info(void)
{
struct sha1_array sa = SHA1_ARRAY_INIT;
for_each_alternate_ref(collect_one_alternate_ref, &sa);
sha1_array_for_each_unique(&sa, show_one_alternate_sha1, NULL);
sha1_array_clear(&sa);
for_each_ref(show_ref_cb, NULL);
if (!sent_capabilities)
show_ref("capabilities^{}", null_sha1);
/* EOF */
packet_flush(1);
}
static int disconnect_git(struct transport *transport)
{
struct git_transport_data *data = transport->data;
if (data->conn) {
packet_flush(data->fd[1]);
close(data->fd[0]);
close(data->fd[1]);
finish_connect(data->conn);
}
free(data);
return 0;
}
/*
* Write V1 header fields.
*/
static void wt_serialize_v1_header(struct wt_status *s, int fd)
{
/*
* Write select fields from the current index to help
* the deserializer recognize a stale data set.
*/
packet_write_fmt(fd, "index_mtime %d %d\n",
the_index.timestamp.sec,
the_index.timestamp.nsec);
/*
* Write data from wt_status to qualify this status report.
* That is, if this run specified "-uno", the consumer of
* our serialization should know that.
*/
packet_write_fmt(fd, "is_initial %d\n", s->is_initial);
if (s->branch)
packet_write_fmt(fd, "branch %s\n", s->branch);
if (s->reference)
packet_write_fmt(fd, "reference %s\n", s->reference);
/* pathspec */
/* verbose */
/* amend */
packet_write_fmt(fd, "whence %d\n", s->whence);
/* nowarn */
/* use_color */
/* no_gettext */
/* display_comment_prefix */
/* relative_paths */
/* submodule_summary */
packet_write_fmt(fd, "show_ignored_mode %d\n", s->show_ignored_mode);
packet_write_fmt(fd, "show_untracked_files %d\n", s->show_untracked_files);
if (s->ignore_submodule_arg)
packet_write_fmt(fd, "ignore_submodule_arg %s\n", s->ignore_submodule_arg);
/* color_palette */
/* colopts */
/* null_termination */
/* commit_template */
/* show_branch */
/* show_stash */
packet_write_fmt(fd, "hints %d\n", s->hints);
packet_write_fmt(fd, "detect_rename %d\n", s->detect_rename);
packet_write_fmt(fd, "rename_score %d\n", s->rename_score);
packet_write_fmt(fd, "rename_limit %d\n", s->rename_limit);
/* status_format */
packet_write_fmt(fd, "sha1_commit %s\n", sha1_to_hex(s->sha1_commit));
packet_write_fmt(fd, "commitable %d\n", s->commitable);
packet_write_fmt(fd, "workdir_dirty %d\n", s->workdir_dirty);
/* prefix */
packet_flush(fd);
}
static int run_remote_archiver(int argc, const char **argv,
const char *remote, const char *exec,
const char *name_hint)
{
char buf[LARGE_PACKET_MAX];
int fd[2], i, len, rv;
struct transport *transport;
struct remote *_remote;
_remote = remote_get(remote);
if (!_remote->url[0])
die(_("git archive: Remote with no URL"));
transport = transport_get(_remote, _remote->url[0]);
transport_connect(transport, "git-upload-archive", exec, fd);
/*
* Inject a fake --format field at the beginning of the
* arguments, with the format inferred from our output
* filename. This way explicit --format options can override
* it.
*/
if (name_hint) {
const char *format = archive_format_from_filename(name_hint);
if (format)
packet_write(fd[1], "argument --format=%s\n", format);
}
for (i = 1; i < argc; i++)
packet_write(fd[1], "argument %s\n", argv[i]);
packet_flush(fd[1]);
len = packet_read_line(fd[0], buf, sizeof(buf));
if (!len)
die(_("git archive: expected ACK/NAK, got EOF"));
if (buf[len-1] == '\n')
buf[--len] = 0;
if (strcmp(buf, "ACK")) {
if (len > 5 && !prefixcmp(buf, "NACK "))
die(_("git archive: NACK %s"), buf + 5);
die(_("git archive: protocol error"));
}
len = packet_read_line(fd[0], buf, sizeof(buf));
if (len)
die(_("git archive: expected a flush"));
/* Now, start reading from fd[0] and spit it out to stdout */
rv = recv_sideband("archive", fd[0], 1);
rv |= transport_disconnect(transport);
return !!rv;
}
struct ref *fetch_pack(struct fetch_pack_args *args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
struct ref **sought, int nr_sought,
struct oid_array *shallow,
char **pack_lockfile,
enum protocol_version version)
{
struct ref *ref_cpy;
struct shallow_info si;
fetch_pack_setup();
if (nr_sought)
nr_sought = remove_duplicates_in_refs(sought, nr_sought);
if (!ref) {
packet_flush(fd[1]);
die(_("no matching remote head"));
}
prepare_shallow_info(&si, shallow);
if (version == protocol_v2)
ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
pack_lockfile);
else
ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
&si, pack_lockfile);
reprepare_packed_git(the_repository);
if (!args->cloning && args->deepen) {
struct check_connected_options opt = CHECK_CONNECTED_INIT;
struct ref *iterator = ref_cpy;
opt.shallow_file = alternate_shallow_file;
if (args->deepen)
opt.is_deepening_fetch = 1;
if (check_connected(iterate_ref_map, &iterator, &opt)) {
error(_("remote did not send all necessary objects"));
free_refs(ref_cpy);
ref_cpy = NULL;
rollback_lock_file(&shallow_lock);
goto cleanup;
}
args->connectivity_checked = 1;
}
update_shallow(args, sought, nr_sought, &si);
cleanup:
clear_shallow_info(&si);
return ref_cpy;
}
/*
* This function places the outgoing packet buffer into an outgoing
* socket buffer
*/
static int packet_write(SSH_SESSION *session) {
int rc = SSH_ERROR;
enter_function();
ssh_socket_write(session->socket,
buffer_get(session->out_buffer),
buffer_get_len(session->out_buffer));
rc = packet_flush(session, 0);
leave_function();
return rc;
}
static void report(const char *unpack_status)
{
struct command *cmd;
packet_write(1, "unpack %s\n",
unpack_status ? unpack_status : "ok");
for (cmd = commands; cmd; cmd = cmd->next) {
if (!cmd->error_string)
packet_write(1, "ok %s\n",
cmd->ref_name);
else
packet_write(1, "ng %s %s\n",
cmd->ref_name, cmd->error_string);
}
packet_flush(1);
}
static void upload_pack(void)
{
if (advertise_refs || !stateless_rpc) {
reset_timeout();
head_ref(send_ref, NULL);
for_each_ref(send_ref, NULL);
packet_flush(1);
} else {
head_ref(mark_our_ref, NULL);
for_each_ref(mark_our_ref, NULL);
}
if (advertise_refs)
return;
receive_needs();
if (want_obj.nr) {
get_common_commits();
create_pack_file();
}
}
static int run_remote_archiver(int argc, const char **argv,
const char *remote, const char *exec)
{
char buf[LARGE_PACKET_MAX];
int fd[2], i, len, rv;
struct transport *transport;
struct remote *_remote;
_remote = remote_get(remote);
if (!_remote->url[0])
die(_("git archive: Remote with no URL"));
transport = transport_get(_remote, _remote->url[0]);
transport_connect(transport, "git-upload-archive", exec, fd);
for (i = 1; i < argc; i++)
packet_write(fd[1], "argument %s\n", argv[i]);
packet_flush(fd[1]);
len = packet_read_line(fd[0], buf, sizeof(buf));
if (!len)
die(_("git archive: expected ACK/NAK, got EOF"));
if (buf[len-1] == '\n')
buf[--len] = 0;
if (strcmp(buf, "ACK")) {
if (len > 5 && !prefixcmp(buf, "NACK "))
die(_("git archive: NACK %s"), buf + 5);
die(_("git archive: protocol error"));
}
len = packet_read_line(fd[0], buf, sizeof(buf));
if (len)
die(_("git archive: expected a flush"));
/* Now, start reading from fd[0] and spit it out to stdout */
rv = recv_sideband("archive", fd[0], 1);
rv |= transport_disconnect(transport);
return !!rv;
}
static int run_remote_archiver(int argc, const char **argv,
const char *remote, const char *exec)
{
char *url, buf[LARGE_PACKET_MAX];
int fd[2], i, len, rv;
struct child_process *conn;
url = xstrdup(remote);
conn = git_connect(fd, url, exec, 0);
for (i = 1; i < argc; i++)
packet_write(fd[1], "argument %s\n", argv[i]);
packet_flush(fd[1]);
len = packet_read_line(fd[0], buf, sizeof(buf));
if (!len)
die("git archive: expected ACK/NAK, got EOF");
if (buf[len-1] == '\n')
buf[--len] = 0;
if (strcmp(buf, "ACK")) {
if (len > 5 && !prefixcmp(buf, "NACK "))
die("git archive: NACK %s", buf + 5);
die("git archive: protocol error");
}
len = packet_read_line(fd[0], buf, sizeof(buf));
if (len)
die("git archive: expected a flush");
/* Now, start reading from fd[0] and spit it out to stdout */
rv = recv_sideband("archive", fd[0], 1);
close(fd[0]);
close(fd[1]);
rv |= finish_connect(conn);
return !!rv;
}
static struct ref *do_fetch_pack(struct fetch_pack_args *args,
int fd[2],
const struct ref *orig_ref,
struct ref **sought, int nr_sought,
struct shallow_info *si,
char **pack_lockfile)
{
struct ref *ref = copy_ref_list(orig_ref);
unsigned char sha1[20];
const char *agent_feature;
int agent_len;
sort_ref_list(&ref, ref_compare_name);
qsort(sought, nr_sought, sizeof(*sought), cmp_ref_by_name);
if (is_repository_shallow() && !server_supports("shallow"))
die("Server does not support shallow clients");
if (server_supports("multi_ack_detailed")) {
if (args->verbose)
fprintf(stderr, "Server supports multi_ack_detailed\n");
multi_ack = 2;
if (server_supports("no-done")) {
if (args->verbose)
fprintf(stderr, "Server supports no-done\n");
if (args->stateless_rpc)
no_done = 1;
}
}
else if (server_supports("multi_ack")) {
if (args->verbose)
fprintf(stderr, "Server supports multi_ack\n");
multi_ack = 1;
}
if (server_supports("side-band-64k")) {
if (args->verbose)
fprintf(stderr, "Server supports side-band-64k\n");
use_sideband = 2;
}
else if (server_supports("side-band")) {
if (args->verbose)
fprintf(stderr, "Server supports side-band\n");
use_sideband = 1;
}
if (server_supports("allow-tip-sha1-in-want")) {
if (args->verbose)
fprintf(stderr, "Server supports allow-tip-sha1-in-want\n");
allow_tip_sha1_in_want = 1;
}
if (!server_supports("thin-pack"))
args->use_thin_pack = 0;
if (!server_supports("no-progress"))
args->no_progress = 0;
if (!server_supports("include-tag"))
args->include_tag = 0;
if (server_supports("ofs-delta")) {
if (args->verbose)
fprintf(stderr, "Server supports ofs-delta\n");
} else
prefer_ofs_delta = 0;
if ((agent_feature = server_feature_value("agent", &agent_len))) {
agent_supported = 1;
if (args->verbose && agent_len)
fprintf(stderr, "Server version is %.*s\n",
agent_len, agent_feature);
}
if (everything_local(args, &ref, sought, nr_sought)) {
packet_flush(fd[1]);
goto all_done;
}
if (find_common(args, fd, sha1, ref) < 0)
if (!args->keep_pack)
/* When cloning, it is not unusual to have
* no common commit.
*/
warning("no common commits");
if (args->stateless_rpc)
packet_flush(fd[1]);
if (args->depth > 0)
setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
NULL);
else if (si->nr_ours || si->nr_theirs)
alternate_shallow_file = setup_temporary_shallow(si->shallow);
else
alternate_shallow_file = NULL;
if (get_pack(args, fd, pack_lockfile))
die("git fetch-pack: fetch failed.");
all_done:
return ref;
}
static int find_common(struct fetch_pack_args *args,
int fd[2], unsigned char *result_sha1,
struct ref *refs)
{
int fetching;
int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
const unsigned char *sha1;
unsigned in_vain = 0;
int got_continue = 0;
int got_ready = 0;
struct strbuf req_buf = STRBUF_INIT;
size_t state_len = 0;
if (args->stateless_rpc && multi_ack == 1)
die("--stateless-rpc requires multi_ack_detailed");
if (marked)
for_each_ref(clear_marks, NULL);
marked = 1;
for_each_ref(rev_list_insert_ref, NULL);
for_each_alternate_ref(insert_one_alternate_ref, NULL);
fetching = 0;
for ( ; refs ; refs = refs->next) {
unsigned char *remote = refs->old_sha1;
const char *remote_hex;
struct object *o;
/*
* If that object is complete (i.e. it is an ancestor of a
* local ref), we tell them we have it but do not have to
* tell them about its ancestors, which they already know
* about.
*
* We use lookup_object here because we are only
* interested in the case we *know* the object is
* reachable and we have already scanned it.
*/
if (((o = lookup_object(remote)) != NULL) &&
(o->flags & COMPLETE)) {
continue;
}
remote_hex = sha1_to_hex(remote);
if (!fetching) {
struct strbuf c = STRBUF_INIT;
if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
if (no_done) strbuf_addstr(&c, " no-done");
if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
if (use_sideband == 1) strbuf_addstr(&c, " side-band");
if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
if (args->no_progress) strbuf_addstr(&c, " no-progress");
if (args->include_tag) strbuf_addstr(&c, " include-tag");
if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
if (agent_supported) strbuf_addf(&c, " agent=%s",
git_user_agent_sanitized());
packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
strbuf_release(&c);
} else
packet_buf_write(&req_buf, "want %s\n", remote_hex);
fetching++;
}
if (!fetching) {
strbuf_release(&req_buf);
packet_flush(fd[1]);
return 1;
}
if (is_repository_shallow())
write_shallow_commits(&req_buf, 1, NULL);
if (args->depth > 0)
packet_buf_write(&req_buf, "deepen %d", args->depth);
packet_buf_flush(&req_buf);
state_len = req_buf.len;
if (args->depth > 0) {
char *line;
const char *arg;
unsigned char sha1[20];
send_request(args, fd[1], &req_buf);
while ((line = packet_read_line(fd[0], NULL))) {
if (skip_prefix(line, "shallow ", &arg)) {
if (get_sha1_hex(arg, sha1))
die("invalid shallow line: %s", line);
register_shallow(sha1);
continue;
}
if (skip_prefix(line, "unshallow ", &arg)) {
if (get_sha1_hex(arg, sha1))
die("invalid unshallow line: %s", line);
if (!lookup_object(sha1))
die("object not found: %s", line);
/* make sure that it is parsed as shallow */
if (!parse_object(sha1))
die("error in object: %s", line);
if (unregister_shallow(sha1))
die("no shallow found: %s", line);
continue;
}
die("expected shallow/unshallow, got %s", line);
}
} else if (!args->stateless_rpc)
send_request(args, fd[1], &req_buf);
if (!args->stateless_rpc) {
/* If we aren't using the stateless-rpc interface
* we don't need to retain the headers.
*/
strbuf_setlen(&req_buf, 0);
state_len = 0;
}
flushes = 0;
retval = -1;
while ((sha1 = get_rev())) {
packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1));
if (args->verbose)
fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
in_vain++;
if (flush_at <= ++count) {
int ack;
packet_buf_flush(&req_buf);
send_request(args, fd[1], &req_buf);
strbuf_setlen(&req_buf, state_len);
flushes++;
flush_at = next_flush(args, count);
/*
* We keep one window "ahead" of the other side, and
* will wait for an ACK only on the next one
*/
if (!args->stateless_rpc && count == INITIAL_FLUSH)
continue;
consume_shallow_list(args, fd[0]);
do {
ack = get_ack(fd[0], result_sha1);
if (args->verbose && ack)
fprintf(stderr, "got ack %d %s\n", ack,
sha1_to_hex(result_sha1));
switch (ack) {
case ACK:
flushes = 0;
multi_ack = 0;
retval = 0;
goto done;
case ACK_common:
case ACK_ready:
case ACK_continue: {
struct commit *commit =
lookup_commit(result_sha1);
if (!commit)
die("invalid commit %s", sha1_to_hex(result_sha1));
if (args->stateless_rpc
&& ack == ACK_common
&& !(commit->object.flags & COMMON)) {
/* We need to replay the have for this object
* on the next RPC request so the peer knows
* it is in common with us.
*/
const char *hex = sha1_to_hex(result_sha1);
packet_buf_write(&req_buf, "have %s\n", hex);
state_len = req_buf.len;
}
mark_common(commit, 0, 1);
retval = 0;
in_vain = 0;
got_continue = 1;
if (ack == ACK_ready) {
clear_prio_queue(&rev_list);
got_ready = 1;
}
break;
}
}
} while (ack);
flushes--;
if (got_continue && MAX_IN_VAIN < in_vain) {
if (args->verbose)
fprintf(stderr, "giving up\n");
break; /* give up */
}
}
}
done:
if (!got_ready || !no_done) {
packet_buf_write(&req_buf, "done\n");
send_request(args, fd[1], &req_buf);
}
if (args->verbose)
fprintf(stderr, "done\n");
if (retval != 0) {
multi_ack = 0;
flushes++;
}
strbuf_release(&req_buf);
if (!got_ready || !no_done)
consume_shallow_list(args, fd[0]);
while (flushes || multi_ack) {
int ack = get_ack(fd[0], result_sha1);
if (ack) {
if (args->verbose)
fprintf(stderr, "got ack (%d) %s\n", ack,
sha1_to_hex(result_sha1));
if (ack == ACK)
return 0;
multi_ack = 1;
continue;
}
flushes--;
}
/* it is no error to fetch into a completely empty repo */
return count ? retval : 0;
}
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
struct ref *remote_refs,
struct extra_have_objects *extra_have)
{
int in = fd[0];
int out = fd[1];
struct ref *ref;
int new_refs;
int ask_for_status_report = 0;
int allow_deleting_refs = 0;
int expect_status_report = 0;
int ret;
/* Does the other end support the reporting? */
if (server_supports("report-status"))
ask_for_status_report = 1;
if (server_supports("delete-refs"))
allow_deleting_refs = 1;
if (server_supports("ofs-delta"))
args->use_ofs_delta = 1;
if (!remote_refs) {
fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
"Perhaps you should specify a branch such as 'master'.\n");
return 0;
}
/*
* Finally, tell the other end!
*/
new_refs = 0;
for (ref = remote_refs; ref; ref = ref->next) {
if (ref->peer_ref)
hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
else if (!args->send_mirror)
continue;
ref->deletion = is_null_sha1(ref->new_sha1);
if (ref->deletion && !allow_deleting_refs) {
ref->status = REF_STATUS_REJECT_NODELETE;
continue;
}
if (!ref->deletion &&
!hashcmp(ref->old_sha1, ref->new_sha1)) {
ref->status = REF_STATUS_UPTODATE;
continue;
}
/* This part determines what can overwrite what.
* The rules are:
*
* (0) you can always use --force or +A:B notation to
* selectively force individual ref pairs.
*
* (1) if the old thing does not exist, it is OK.
*
* (2) if you do not have the old thing, you are not allowed
* to overwrite it; you would not know what you are losing
* otherwise.
*
* (3) if both new and old are commit-ish, and new is a
* descendant of old, it is OK.
*
* (4) regardless of all of the above, removing :B is
* always allowed.
*/
ref->nonfastforward =
!ref->deletion &&
!is_null_sha1(ref->old_sha1) &&
(!has_sha1_file(ref->old_sha1)
|| !ref_newer(ref->new_sha1, ref->old_sha1));
if (ref->nonfastforward && !ref->force && !args->force_update) {
ref->status = REF_STATUS_REJECT_NONFASTFORWARD;
continue;
}
if (!ref->deletion)
new_refs++;
if (!args->dry_run) {
char *old_hex = sha1_to_hex(ref->old_sha1);
char *new_hex = sha1_to_hex(ref->new_sha1);
if (ask_for_status_report) {
packet_write(out, "%s %s %s%c%s",
old_hex, new_hex, ref->name, 0,
"report-status");
ask_for_status_report = 0;
expect_status_report = 1;
}
else
packet_write(out, "%s %s %s",
old_hex, new_hex, ref->name);
}
ref->status = expect_status_report ?
REF_STATUS_EXPECTING_REPORT :
REF_STATUS_OK;
}
packet_flush(out);
if (new_refs && !args->dry_run) {
if (pack_objects(out, remote_refs, extra_have, args) < 0) {
for (ref = remote_refs; ref; ref = ref->next)
ref->status = REF_STATUS_NONE;
return -1;
}
}
if (expect_status_report)
ret = receive_status(in, remote_refs);
else
ret = 0;
if (ret < 0)
return ret;
for (ref = remote_refs; ref; ref = ref->next) {
switch (ref->status) {
case REF_STATUS_NONE:
case REF_STATUS_UPTODATE:
case REF_STATUS_OK:
break;
default:
return -1;
}
}
return 0;
}
