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 ((args->depth > 0 || 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_unadvertised_object_request |= ALLOW_TIP_SHA1;
}
if (server_supports("allow-reachable-sha1-in-want")) {
if (args->verbose)
fprintf(stderr, "Server supports allow-reachable-sha1-in-want\n");
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
}
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 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;
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("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;
}
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_oid, NULL);
for_each_alternate_ref(insert_one_alternate_ref, NULL);
fetching = 0;
for ( ; refs ; refs = refs->next) {
unsigned char *remote = refs->old_oid.hash;
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;
}
/*
* Make a pack stream and spit it out into file descriptor fd
*/
static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struct send_pack_args *args)
{
/*
* The child becomes pack-objects --revs; we feed
* the revision parameters to it via its stdin and
* let its stdout go back to the other end.
*/
struct child_process po = CHILD_PROCESS_INIT;
FILE *po_in;
int i;
int rc;
argv_array_push(&po.args, "pack-objects");
argv_array_push(&po.args, "--all-progress-implied");
argv_array_push(&po.args, "--revs");
argv_array_push(&po.args, "--stdout");
if (args->use_thin_pack)
argv_array_push(&po.args, "--thin");
if (args->use_ofs_delta)
argv_array_push(&po.args, "--delta-base-offset");
if (args->quiet || !args->progress)
argv_array_push(&po.args, "-q");
if (args->progress)
argv_array_push(&po.args, "--progress");
if (is_repository_shallow(the_repository))
argv_array_push(&po.args, "--shallow");
po.in = -1;
po.out = args->stateless_rpc ? -1 : fd;
po.git_cmd = 1;
if (start_command(&po))
die_errno("git pack-objects failed");
/*
* We feed the pack-objects we just spawned with revision
* parameters by writing to the pipe.
*/
po_in = xfdopen(po.in, "w");
for (i = 0; i < extra->nr; i++)
feed_object(&extra->oid[i], po_in, 1);
while (refs) {
if (!is_null_oid(&refs->old_oid))
feed_object(&refs->old_oid, po_in, 1);
if (!is_null_oid(&refs->new_oid))
feed_object(&refs->new_oid, po_in, 0);
refs = refs->next;
}
fflush(po_in);
if (ferror(po_in))
die_errno("error writing to pack-objects");
fclose(po_in);
if (args->stateless_rpc) {
char *buf = xmalloc(LARGE_PACKET_MAX);
while (1) {
ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
if (n <= 0)
break;
send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
}
free(buf);
close(po.out);
po.out = -1;
}
rc = finish_command(&po);
if (rc) {
/*
* For a normal non-zero exit, we assume pack-objects wrote
* something useful to stderr. For death by signal, though,
* we should mention it to the user. The exception is SIGPIPE
* (141), because that's a normal occurrence if the remote end
* hangs up (and we'll report that by trying to read the unpack
* status).
*/
if (rc > 128 && rc != 141)
error("pack-objects died of signal %d", rc - 128);
return -1;
}
return 0;
}
static void receive_needs(void)
{
struct object_array shallows = OBJECT_ARRAY_INIT;
int depth = 0;
int has_non_tip = 0;
shallow_nr = 0;
for (;;) {
struct object *o;
const char *features;
unsigned char sha1_buf[20];
char *line = packet_read_line(0, NULL);
reset_timeout();
if (!line)
break;
if (starts_with(line, "shallow ")) {
unsigned char sha1[20];
struct object *object;
if (get_sha1_hex(line + 8, sha1))
die("invalid shallow line: %s", line);
object = parse_object(sha1);
if (!object)
continue;
if (object->type != OBJ_COMMIT)
die("invalid shallow object %s", sha1_to_hex(sha1));
if (!(object->flags & CLIENT_SHALLOW)) {
object->flags |= CLIENT_SHALLOW;
add_object_array(object, NULL, &shallows);
}
continue;
}
if (starts_with(line, "deepen ")) {
char *end;
depth = strtol(line + 7, &end, 0);
if (end == line + 7 || depth <= 0)
die("Invalid deepen: %s", line);
continue;
}
if (!starts_with(line, "want ") ||
get_sha1_hex(line+5, sha1_buf))
die("git upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
features = line + 45;
if (parse_feature_request(features, "multi_ack_detailed"))
multi_ack = 2;
else if (parse_feature_request(features, "multi_ack"))
multi_ack = 1;
if (parse_feature_request(features, "no-done"))
no_done = 1;
if (parse_feature_request(features, "thin-pack"))
use_thin_pack = 1;
if (parse_feature_request(features, "ofs-delta"))
use_ofs_delta = 1;
if (parse_feature_request(features, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
else if (parse_feature_request(features, "side-band"))
use_sideband = DEFAULT_PACKET_MAX;
if (parse_feature_request(features, "no-progress"))
no_progress = 1;
if (parse_feature_request(features, "include-tag"))
use_include_tag = 1;
o = parse_object(sha1_buf);
if (!o)
die("git upload-pack: not our ref %s",
sha1_to_hex(sha1_buf));
if (!(o->flags & WANTED)) {
o->flags |= WANTED;
if (!is_our_ref(o))
has_non_tip = 1;
add_object_array(o, NULL, &want_obj);
}
}
/*
* We have sent all our refs already, and the other end
* should have chosen out of them. When we are operating
* in the stateless RPC mode, however, their choice may
* have been based on the set of older refs advertised
* by another process that handled the initial request.
*/
if (has_non_tip)
check_non_tip();
if (!use_sideband && daemon_mode)
no_progress = 1;
if (depth == 0 && shallows.nr == 0)
return;
if (depth > 0) {
struct commit_list *result = NULL, *backup = NULL;
int i;
if (depth == INFINITE_DEPTH && !is_repository_shallow())
for (i = 0; i < shallows.nr; i++) {
struct object *object = shallows.objects[i].item;
object->flags |= NOT_SHALLOW;
}
else
backup = result =
get_shallow_commits(&want_obj, depth,
SHALLOW, NOT_SHALLOW);
while (result) {
struct object *object = &result->item->object;
if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
packet_write(1, "shallow %s",
sha1_to_hex(object->sha1));
register_shallow(object->sha1);
shallow_nr++;
}
result = result->next;
}
free_commit_list(backup);
for (i = 0; i < shallows.nr; i++) {
struct object *object = shallows.objects[i].item;
if (object->flags & NOT_SHALLOW) {
struct commit_list *parents;
packet_write(1, "unshallow %s",
sha1_to_hex(object->sha1));
object->flags &= ~CLIENT_SHALLOW;
/* make sure the real parents are parsed */
unregister_shallow(object->sha1);
object->parsed = 0;
parse_commit_or_die((struct commit *)object);
parents = ((struct commit *)object)->parents;
while (parents) {
add_object_array(&parents->item->object,
NULL, &want_obj);
parents = parents->next;
}
add_object_array(object, NULL, &extra_edge_obj);
}
/* make sure commit traversal conforms to client */
register_shallow(object->sha1);
}
packet_flush(1);
} else if (shallows.nr > 0) {
int i;
for (i = 0; i < shallows.nr; i++)
register_shallow(shallows.objects[i].item->sha1);
}
shallow_nr += shallows.nr;
free(shallows.objects);
}
static void advertise_shallow_grafts_buf(struct strbuf *sb)
{
if (!is_repository_shallow(the_repository))
return;
for_each_commit_graft(advertise_shallow_grafts_cb, sb);
}
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
struct ref *remote_refs,
struct oid_array *extra_have)
{
int in = fd[0];
int out = fd[1];
struct strbuf req_buf = STRBUF_INIT;
struct strbuf cap_buf = STRBUF_INIT;
struct ref *ref;
int need_pack_data = 0;
int allow_deleting_refs = 0;
int status_report = 0;
int use_sideband = 0;
int quiet_supported = 0;
int agent_supported = 0;
int use_atomic = 0;
int atomic_supported = 0;
int use_push_options = 0;
int push_options_supported = 0;
unsigned cmds_sent = 0;
int ret;
struct async demux;
const char *push_cert_nonce = NULL;
struct packet_reader reader;
git_config(send_pack_config, NULL);
/* Does the other end support the reporting? */
if (server_supports("report-status"))
status_report = 1;
if (server_supports("delete-refs"))
allow_deleting_refs = 1;
if (server_supports("ofs-delta"))
args->use_ofs_delta = 1;
if (config_use_sideband && server_supports("side-band-64k"))
use_sideband = 1;
if (server_supports("quiet"))
quiet_supported = 1;
if (server_supports("agent"))
agent_supported = 1;
if (server_supports("no-thin"))
args->use_thin_pack = 0;
if (server_supports("atomic"))
atomic_supported = 1;
if (server_supports("push-options"))
push_options_supported = 1;
if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
int len;
push_cert_nonce = server_feature_value("push-cert", &len);
if (push_cert_nonce) {
reject_invalid_nonce(push_cert_nonce, len);
push_cert_nonce = xmemdupz(push_cert_nonce, len);
} else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
die(_("the receiving end does not support --signed push"));
} else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
warning(_("not sending a push certificate since the"
" receiving end does not support --signed"
" push"));
}
}
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;
}
if (args->atomic && !atomic_supported)
die(_("the receiving end does not support --atomic push"));
use_atomic = atomic_supported && args->atomic;
if (args->push_options && !push_options_supported)
die(_("the receiving end does not support push options"));
use_push_options = push_options_supported && args->push_options;
if (status_report)
strbuf_addstr(&cap_buf, " report-status");
if (use_sideband)
strbuf_addstr(&cap_buf, " side-band-64k");
if (quiet_supported && (args->quiet || !args->progress))
strbuf_addstr(&cap_buf, " quiet");
if (use_atomic)
strbuf_addstr(&cap_buf, " atomic");
if (use_push_options)
strbuf_addstr(&cap_buf, " push-options");
if (agent_supported)
strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
/*
* NEEDSWORK: why does delete-refs have to be so specific to
* send-pack machinery that set_ref_status_for_push() cannot
* set this bit for us???
*/
for (ref = remote_refs; ref; ref = ref->next)
if (ref->deletion && !allow_deleting_refs)
ref->status = REF_STATUS_REJECT_NODELETE;
if (!args->dry_run)
advertise_shallow_grafts_buf(&req_buf);
if (!args->dry_run && push_cert_nonce)
cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
cap_buf.buf, push_cert_nonce);
/*
* Clear the status for each ref and see if we need to send
* the pack data.
*/
for (ref = remote_refs; ref; ref = ref->next) {
switch (check_to_send_update(ref, args)) {
case 0: /* no error */
break;
case CHECK_REF_STATUS_REJECTED:
/*
* When we know the server would reject a ref update if
* we were to send it and we're trying to send the refs
* atomically, abort the whole operation.
*/
if (use_atomic) {
strbuf_release(&req_buf);
strbuf_release(&cap_buf);
return atomic_push_failure(args, remote_refs, ref);
}
/* else fallthrough */
default:
continue;
}
if (!ref->deletion)
need_pack_data = 1;
if (args->dry_run || !status_report)
ref->status = REF_STATUS_OK;
else
ref->status = REF_STATUS_EXPECTING_REPORT;
}
/*
* Finally, tell the other end!
*/
for (ref = remote_refs; ref; ref = ref->next) {
char *old_hex, *new_hex;
if (args->dry_run || push_cert_nonce)
continue;
if (check_to_send_update(ref, args) < 0)
continue;
old_hex = oid_to_hex(&ref->old_oid);
new_hex = oid_to_hex(&ref->new_oid);
if (!cmds_sent) {
packet_buf_write(&req_buf,
"%s %s %s%c%s",
old_hex, new_hex, ref->name, 0,
cap_buf.buf);
cmds_sent = 1;
} else {
packet_buf_write(&req_buf, "%s %s %s",
old_hex, new_hex, ref->name);
}
}
if (use_push_options) {
struct string_list_item *item;
packet_buf_flush(&req_buf);
for_each_string_list_item(item, args->push_options)
packet_buf_write(&req_buf, "%s", item->string);
}
if (args->stateless_rpc) {
if (!args->dry_run && (cmds_sent || is_repository_shallow(the_repository))) {
packet_buf_flush(&req_buf);
send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
}
} else {
write_or_die(out, req_buf.buf, req_buf.len);
packet_flush(out);
}
strbuf_release(&req_buf);
strbuf_release(&cap_buf);
if (use_sideband && cmds_sent) {
memset(&demux, 0, sizeof(demux));
demux.proc = sideband_demux;
demux.data = fd;
demux.out = -1;
demux.isolate_sigpipe = 1;
if (start_async(&demux))
die("send-pack: unable to fork off sideband demultiplexer");
in = demux.out;
}
packet_reader_init(&reader, in, NULL, 0,
PACKET_READ_CHOMP_NEWLINE |
PACKET_READ_DIE_ON_ERR_PACKET);
if (need_pack_data && cmds_sent) {
if (pack_objects(out, remote_refs, extra_have, args) < 0) {
for (ref = remote_refs; ref; ref = ref->next)
ref->status = REF_STATUS_NONE;
if (args->stateless_rpc)
close(out);
if (git_connection_is_socket(conn))
shutdown(fd[0], SHUT_WR);
/*
* Do not even bother with the return value; we know we
* are failing, and just want the error() side effects.
*/
if (status_report)
receive_unpack_status(&reader);
if (use_sideband) {
close(demux.out);
finish_async(&demux);
}
fd[1] = -1;
return -1;
}
if (!args->stateless_rpc)
/* Closed by pack_objects() via start_command() */
fd[1] = -1;
}
if (args->stateless_rpc && cmds_sent)
packet_flush(out);
if (status_report && cmds_sent)
ret = receive_status(&reader, remote_refs);
else
ret = 0;
if (args->stateless_rpc)
packet_flush(out);
if (use_sideband && cmds_sent) {
close(demux.out);
if (finish_async(&demux)) {
error("error in sideband demultiplexer");
ret = -1;
}
}
if (ret < 0)
return ret;
if (args->porcelain)
return 0;
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;
}
static struct ref *do_fetch_pack(struct fetch_pack_args *args,
int fd[2],
const struct ref *orig_ref,
struct string_list *sought,
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);
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("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)) {
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 (get_pack(args, fd, pack_lockfile))
die("git fetch-pack: fetch failed.");
all_done:
return ref;
}
int cmd_prune(int argc, const char **argv, const char *prefix)
{
struct rev_info revs;
struct progress *progress = NULL;
int prune_repos = 0;
const struct option options[] = {
OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
OPT__VERBOSE(&verbose, N_("report pruned objects")),
OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
OPT_BOOL(0, "repos", &prune_repos, N_("prune .git/repos/")),
OPT_EXPIRY_DATE(0, "expire", &expire,
N_("expire objects older than <time>")),
OPT_END()
};
char *s;
expire = ULONG_MAX;
save_commit_buffer = 0;
check_replace_refs = 0;
init_revisions(&revs, prefix);
argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
if (prune_repos) {
if (argc)
die(_("--repos does not take extra arguments"));
prune_repos_dir();
return 0;
}
while (argc--) {
unsigned char sha1[20];
const char *name = *argv++;
if (!get_sha1(name, sha1)) {
struct object *object = parse_object_or_die(sha1, name);
add_pending_object(&revs, object, "");
}
else
die("unrecognized argument: %s", name);
}
if (show_progress == -1)
show_progress = isatty(2);
if (show_progress)
progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
mark_reachable_objects(&revs, 1, progress);
stop_progress(&progress);
prune_object_dir(get_object_directory());
prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
remove_temporary_files(get_object_directory());
s = mkpathdup("%s/pack", get_object_directory());
remove_temporary_files(s);
free(s);
if (is_repository_shallow())
prune_shallow(show_only);
return 0;
}
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);
struct object_id oid;
const char *agent_feature;
int agent_len;
sort_ref_list(&ref, ref_compare_name);
QSORT(sought, nr_sought, cmp_ref_by_name);
if ((args->depth > 0 || is_repository_shallow()) && !server_supports("shallow"))
die(_("Server does not support shallow clients"));
if (args->depth > 0 || args->deepen_since || args->deepen_not)
args->deepen = 1;
if (server_supports("multi_ack_detailed")) {
print_verbose(args, _("Server supports multi_ack_detailed"));
multi_ack = 2;
if (server_supports("no-done")) {
print_verbose(args, _("Server supports no-done"));
if (args->stateless_rpc)
no_done = 1;
}
}
else if (server_supports("multi_ack")) {
print_verbose(args, _("Server supports multi_ack"));
multi_ack = 1;
}
if (server_supports("side-band-64k")) {
print_verbose(args, _("Server supports side-band-64k"));
use_sideband = 2;
}
else if (server_supports("side-band")) {
print_verbose(args, _("Server supports side-band"));
use_sideband = 1;
}
if (server_supports("allow-tip-sha1-in-want")) {
print_verbose(args, _("Server supports allow-tip-sha1-in-want"));
allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
}
if (server_supports("allow-reachable-sha1-in-want")) {
print_verbose(args, _("Server supports allow-reachable-sha1-in-want"));
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
}
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"))
print_verbose(args, _("Server supports ofs-delta"));
else
prefer_ofs_delta = 0;
if (server_supports("filter")) {
server_supports_filtering = 1;
print_verbose(args, _("Server supports filter"));
} else if (args->filter_options.choice) {
warning("filtering not recognized by server, ignoring");
}
if ((agent_feature = server_feature_value("agent", &agent_len))) {
agent_supported = 1;
if (agent_len)
print_verbose(args, _("Server version is %.*s"),
agent_len, agent_feature);
}
if (server_supports("deepen-since"))
deepen_since_ok = 1;
else if (args->deepen_since)
die(_("Server does not support --shallow-since"));
if (server_supports("deepen-not"))
deepen_not_ok = 1;
else if (args->deepen_not)
die(_("Server does not support --shallow-exclude"));
if (!server_supports("deepen-relative") && args->deepen_relative)
die(_("Server does not support --deepen"));
if (everything_local(args, &ref, sought, nr_sought)) {
packet_flush(fd[1]);
goto all_done;
}
if (find_common(args, fd, &oid, 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->deepen)
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 send_fetch_request(int fd_out, const struct fetch_pack_args *args,
const struct ref *wants, struct oidset *common,
int *haves_to_send, int *in_vain)
{
int ret = 0;
struct strbuf req_buf = STRBUF_INIT;
if (server_supports_v2("fetch", 1))
packet_buf_write(&req_buf, "command=fetch");
if (server_supports_v2("agent", 0))
packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
if (args->server_options && args->server_options->nr &&
server_supports_v2("server-option", 1)) {
int i;
for (i = 0; i < args->server_options->nr; i++)
packet_write_fmt(fd_out, "server-option=%s",
args->server_options->items[i].string);
}
packet_buf_delim(&req_buf);
if (args->use_thin_pack)
packet_buf_write(&req_buf, "thin-pack");
if (args->no_progress)
packet_buf_write(&req_buf, "no-progress");
if (args->include_tag)
packet_buf_write(&req_buf, "include-tag");
if (prefer_ofs_delta)
packet_buf_write(&req_buf, "ofs-delta");
/* Add shallow-info and deepen request */
if (server_supports_feature("fetch", "shallow", 0))
add_shallow_requests(&req_buf, args);
else if (is_repository_shallow() || args->deepen)
die(_("Server does not support shallow requests"));
/* Add filter */
if (server_supports_feature("fetch", "filter", 0) &&
args->filter_options.choice) {
print_verbose(args, _("Server supports filter"));
packet_buf_write(&req_buf, "filter %s",
args->filter_options.filter_spec);
} else if (args->filter_options.choice) {
warning("filtering not recognized by server, ignoring");
}
/* add wants */
add_wants(wants, &req_buf);
if (args->no_dependents) {
packet_buf_write(&req_buf, "done");
ret = 1;
} else {
/* Add all of the common commits we've found in previous rounds */
add_common(&req_buf, common);
/* Add initial haves */
ret = add_haves(&req_buf, haves_to_send, in_vain);
}
/* Send request */
packet_buf_flush(&req_buf);
write_or_die(fd_out, req_buf.buf, req_buf.len);
strbuf_release(&req_buf);
return ret;
}
int cmd_receive_pack(int argc, const char **argv, const char *prefix)
{
int advertise_refs = 0;
int stateless_rpc = 0;
int i;
char *dir = NULL;
struct command *commands;
packet_trace_identity("receive-pack");
argv++;
for (i = 1; i < argc; i++) {
const char *arg = *argv++;
if (*arg == '-') {
if (!strcmp(arg, "--quiet")) {
quiet = 1;
continue;
}
if (!strcmp(arg, "--advertise-refs")) {
advertise_refs = 1;
continue;
}
if (!strcmp(arg, "--stateless-rpc")) {
stateless_rpc = 1;
continue;
}
if (!strcmp(arg, "--reject-thin-pack-for-testing")) {
fix_thin = 0;
continue;
}
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' does not appear to be a git repository", 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;
if (advertise_refs || !stateless_rpc) {
write_head_info();
}
if (advertise_refs)
return 0;
if ((commands = read_head_info()) != NULL) {
const char *unpack_status = NULL;
if (!delete_only(commands))
unpack_status = unpack_with_sideband();
execute_commands(commands, unpack_status);
if (pack_lockfile)
unlink_or_warn(pack_lockfile);
if (report_status)
report(commands, unpack_status);
run_receive_hook(commands, "post-receive", 1);
run_update_post_hook(commands);
if (auto_gc) {
const char *argv_gc_auto[] = {
"gc", "--auto", "--quiet", NULL,
};
int opt = RUN_GIT_CMD | RUN_COMMAND_STDOUT_TO_STDERR;
run_command_v_opt(argv_gc_auto, opt);
}
if (auto_update_server_info)
update_server_info(0);
}
if (use_sideband)
packet_flush(1);
return 0;
}
static int find_common(struct fetch_negotiator *negotiator,
struct fetch_pack_args *args,
int fd[2], struct object_id *result_oid,
struct ref *refs)
{
int fetching;
int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
const struct object_id *oid;
unsigned in_vain = 0;
int got_continue = 0;
int got_ready = 0;
struct strbuf req_buf = STRBUF_INIT;
size_t state_len = 0;
struct packet_reader reader;
if (args->stateless_rpc && multi_ack == 1)
die(_("--stateless-rpc requires multi_ack_detailed"));
packet_reader_init(&reader, fd[0], NULL, 0,
PACKET_READ_CHOMP_NEWLINE |
PACKET_READ_DIE_ON_ERR_PACKET);
if (!args->no_dependents) {
mark_tips(negotiator, args->negotiation_tips);
for_each_cached_alternate(negotiator, insert_one_alternate_object);
}
fetching = 0;
for ( ; refs ; refs = refs->next) {
struct object_id *remote = &refs->old_oid;
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.
*
* Do this only if args->no_dependents is false (if it is true,
* we cannot trust the object flags).
*/
if (!args->no_dependents &&
((o = lookup_object(the_repository, remote->hash)) != NULL) &&
(o->flags & COMPLETE)) {
continue;
}
remote_hex = oid_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->deepen_relative) strbuf_addstr(&c, " deepen-relative");
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 (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
if (agent_supported) strbuf_addf(&c, " agent=%s",
git_user_agent_sanitized());
if (args->filter_options.choice)
strbuf_addstr(&c, " filter");
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(the_repository))
write_shallow_commits(&req_buf, 1, NULL);
if (args->depth > 0)
packet_buf_write(&req_buf, "deepen %d", args->depth);
if (args->deepen_since) {
timestamp_t max_age = approxidate(args->deepen_since);
packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
}
if (args->deepen_not) {
int i;
for (i = 0; i < args->deepen_not->nr; i++) {
struct string_list_item *s = args->deepen_not->items + i;
packet_buf_write(&req_buf, "deepen-not %s", s->string);
}
}
if (server_supports_filtering && args->filter_options.choice) {
struct strbuf expanded_filter_spec = STRBUF_INIT;
expand_list_objects_filter_spec(&args->filter_options,
&expanded_filter_spec);
packet_buf_write(&req_buf, "filter %s",
expanded_filter_spec.buf);
strbuf_release(&expanded_filter_spec);
}
packet_buf_flush(&req_buf);
state_len = req_buf.len;
if (args->deepen) {
const char *arg;
struct object_id oid;
send_request(args, fd[1], &req_buf);
while (packet_reader_read(&reader) == PACKET_READ_NORMAL) {
if (skip_prefix(reader.line, "shallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid shallow line: %s"), reader.line);
register_shallow(the_repository, &oid);
continue;
}
if (skip_prefix(reader.line, "unshallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid unshallow line: %s"), reader.line);
if (!lookup_object(the_repository, oid.hash))
die(_("object not found: %s"), reader.line);
/* make sure that it is parsed as shallow */
if (!parse_object(the_repository, &oid))
die(_("error in object: %s"), reader.line);
if (unregister_shallow(&oid))
die(_("no shallow found: %s"), reader.line);
continue;
}
die(_("expected shallow/unshallow, got %s"), reader.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;
if (args->no_dependents)
goto done;
while ((oid = negotiator->next(negotiator))) {
packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
print_verbose(args, "have %s", oid_to_hex(oid));
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->stateless_rpc, 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, &reader);
do {
ack = get_ack(&reader, result_oid);
if (ack)
print_verbose(args, _("got %s %d %s"), "ack",
ack, oid_to_hex(result_oid));
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(the_repository,
result_oid);
int was_common;
if (!commit)
die(_("invalid commit %s"), oid_to_hex(result_oid));
was_common = negotiator->ack(negotiator, commit);
if (args->stateless_rpc
&& ack == ACK_common
&& !was_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 = oid_to_hex(result_oid);
packet_buf_write(&req_buf, "have %s\n", hex);
state_len = req_buf.len;
/*
* Reset in_vain because an ack
* for this commit has not been
* seen.
*/
in_vain = 0;
} else if (!args->stateless_rpc
|| ack != ACK_common)
in_vain = 0;
retval = 0;
got_continue = 1;
if (ack == ACK_ready)
got_ready = 1;
break;
}
}
} while (ack);
flushes--;
if (got_continue && MAX_IN_VAIN < in_vain) {
print_verbose(args, _("giving up"));
break; /* give up */
}
if (got_ready)
break;
}
}
done:
if (!got_ready || !no_done) {
packet_buf_write(&req_buf, "done\n");
send_request(args, fd[1], &req_buf);
}
print_verbose(args, _("done"));
if (retval != 0) {
multi_ack = 0;
flushes++;
}
strbuf_release(&req_buf);
if (!got_ready || !no_done)
consume_shallow_list(args, &reader);
while (flushes || multi_ack) {
int ack = get_ack(&reader, result_oid);
if (ack) {
print_verbose(args, _("got %s (%d) %s"), "ack",
ack, oid_to_hex(result_oid));
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;
}
/*
* Make a pack stream and spit it out into file descriptor fd
*/
static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
{
/*
* The child becomes pack-objects --revs; we feed
* the revision parameters to it via its stdin and
* let its stdout go back to the other end.
*/
const char *argv[] = {
"pack-objects",
"--all-progress-implied",
"--revs",
"--stdout",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
struct child_process po = CHILD_PROCESS_INIT;
int i;
i = 4;
if (args->use_thin_pack)
argv[i++] = "--thin";
if (args->use_ofs_delta)
argv[i++] = "--delta-base-offset";
if (args->quiet || !args->progress)
argv[i++] = "-q";
if (args->progress)
argv[i++] = "--progress";
if (is_repository_shallow())
argv[i++] = "--shallow";
po.argv = argv;
po.in = -1;
po.out = args->stateless_rpc ? -1 : fd;
po.git_cmd = 1;
if (start_command(&po))
die_errno("git pack-objects failed");
/*
* We feed the pack-objects we just spawned with revision
* parameters by writing to the pipe.
*/
for (i = 0; i < extra->nr; i++)
if (!feed_object(extra->sha1[i], po.in, 1))
break;
while (refs) {
if (!is_null_oid(&refs->old_oid) &&
!feed_object(refs->old_oid.hash, po.in, 1))
break;
if (!is_null_oid(&refs->new_oid) &&
!feed_object(refs->new_oid.hash, po.in, 0))
break;
refs = refs->next;
}
close(po.in);
if (args->stateless_rpc) {
char *buf = xmalloc(LARGE_PACKET_MAX);
while (1) {
ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
if (n <= 0)
break;
send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
}
free(buf);
close(po.out);
po.out = -1;
}
if (finish_command(&po))
return -1;
return 0;
}
