int is_repository_shallow(void)
{
FILE *fp;
char buf[1024];
const char *path = alternate_shallow_file;
if (is_shallow >= 0)
return is_shallow;
if (!path)
path = git_path("shallow");
/*
* fetch-pack sets '--shallow-file ""' as an indicator that no
* shallow file should be used. We could just open it and it
* will likely fail. But let's do an explicit check instead.
*/
if (!*path ||
stat(path, &shallow_stat) ||
(fp = fopen(path, "r")) == NULL) {
is_shallow = 0;
return is_shallow;
}
is_shallow = 1;
while (fgets(buf, sizeof(buf), fp)) {
unsigned char sha1[20];
if (get_sha1_hex(buf, sha1))
die("bad shallow line: %s", buf);
register_shallow(sha1);
}
fclose(fp);
return is_shallow;
}
static void send_unshallow(const struct object_array *shallows)
{
int i;
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_fmt(1, "unshallow %s",
oid_to_hex(&object->oid));
object->flags &= ~CLIENT_SHALLOW;
/*
* We want to _register_ "object" as shallow, but we
* also need to traverse object's parents to deepen a
* shallow clone. Unregister it for now so we can
* parse and add the parents to the want list, then
* re-register it.
*/
unregister_shallow(&object->oid);
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(the_repository, &object->oid);
}
}
static void send_shallow(struct commit_list *result)
{
while (result) {
struct object *object = &result->item->object;
if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
packet_write_fmt(1, "shallow %s",
oid_to_hex(&object->oid));
register_shallow(the_repository, &object->oid);
shallow_nr++;
}
result = result->next;
}
}
/* Returns 1 if a shallow list is sent or 0 otherwise */
static int send_shallow_list(int depth, int deepen_rev_list,
timestamp_t deepen_since,
struct string_list *deepen_not,
struct object_array *shallows)
{
int ret = 0;
if (depth > 0 && deepen_rev_list)
die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
if (depth > 0) {
deepen(depth, deepen_relative, shallows);
ret = 1;
} else if (deepen_rev_list) {
struct argv_array av = ARGV_ARRAY_INIT;
int i;
argv_array_push(&av, "rev-list");
if (deepen_since)
argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
if (deepen_not->nr) {
argv_array_push(&av, "--not");
for (i = 0; i < deepen_not->nr; i++) {
struct string_list_item *s = deepen_not->items + i;
argv_array_push(&av, s->string);
}
argv_array_push(&av, "--not");
}
for (i = 0; i < want_obj.nr; i++) {
struct object *o = want_obj.objects[i].item;
argv_array_push(&av, oid_to_hex(&o->oid));
}
deepen_by_rev_list(av.argc, av.argv, shallows);
argv_array_clear(&av);
ret = 1;
} else {
if (shallows->nr > 0) {
int i;
for (i = 0; i < shallows->nr; i++)
register_shallow(the_repository,
&shallows->objects[i].item->oid);
}
}
shallow_nr += shallows->nr;
return ret;
}
static void receive_shallow_info(struct fetch_pack_args *args,
struct packet_reader *reader)
{
int line_received = 0;
process_section_header(reader, "shallow-info", 0);
while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
const char *arg;
struct object_id oid;
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);
line_received = 1;
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);
line_received = 1;
continue;
}
die(_("expected shallow/unshallow, got %s"), reader->line);
}
if (reader->status != PACKET_READ_FLUSH &&
reader->status != PACKET_READ_DELIM)
die(_("error processing shallow info: %d"), reader->status);
if (line_received) {
setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
NULL);
args->deepen = 1;
}
}
static int update_shallow_ref(struct command *cmd, struct shallow_info *si)
{
static struct lock_file shallow_lock;
struct sha1_array extra = SHA1_ARRAY_INIT;
const char *alt_file;
uint32_t mask = 1 << (cmd->index % 32);
int i;
trace_printf_key(&trace_shallow,
"shallow: update_shallow_ref %s\n", cmd->ref_name);
for (i = 0; i < si->shallow->nr; i++)
if (si->used_shallow[i] &&
(si->used_shallow[i][cmd->index / 32] & mask) &&
!delayed_reachability_test(si, i))
sha1_array_append(&extra, si->shallow->sha1[i]);
setup_alternate_shallow(&shallow_lock, &alt_file, &extra);
if (check_shallow_connected(command_singleton_iterator,
0, cmd, alt_file)) {
rollback_lock_file(&shallow_lock);
sha1_array_clear(&extra);
return -1;
}
commit_lock_file(&shallow_lock);
/*
* Make sure setup_alternate_shallow() for the next ref does
* not lose these new roots..
*/
for (i = 0; i < extra.nr; i++)
register_shallow(extra.sha1[i]);
si->shallow_ref[cmd->index] = 0;
sha1_array_clear(&extra);
return 0;
}
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;
}
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 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;
if (args->stateless_rpc && multi_ack == 1)
die(_("--stateless-rpc requires multi_ack_detailed"));
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)
packet_buf_write(&req_buf, "filter %s",
args->filter_options.filter_spec);
packet_buf_flush(&req_buf);
state_len = req_buf.len;
if (args->deepen) {
char *line;
const char *arg;
struct object_id oid;
send_request(args, fd[1], &req_buf);
while ((line = packet_read_line(fd[0], NULL))) {
if (skip_prefix(line, "shallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid shallow line: %s"), line);
register_shallow(the_repository, &oid);
continue;
}
if (skip_prefix(line, "unshallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid unshallow line: %s"), line);
if (!lookup_object(the_repository, oid.hash))
die(_("object not found: %s"), line);
/* make sure that it is parsed as shallow */
if (!parse_object(the_repository, &oid))
die(_("error in object: %s"), line);
if (unregister_shallow(&oid))
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;
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, fd[0]);
do {
ack = get_ack(fd[0], 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, fd[0]);
while (flushes || multi_ack) {
int ack = get_ack(fd[0], 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;
}
static int find_common(int fd[2], unsigned char *result_sha1,
struct ref *refs)
{
int fetching;
int count = 0, flushes = 0, retval;
const unsigned char *sha1;
unsigned in_vain = 0;
int got_continue = 0;
if (marked)
for_each_ref(clear_marks, NULL);
marked = 1;
for_each_ref(rev_list_insert_ref, NULL);
fetching = 0;
for ( ; refs ; refs = refs->next) {
unsigned char *remote = refs->old_sha1;
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;
}
if (!fetching)
packet_write(fd[1], "want %s%s%s%s%s%s%s%s\n",
sha1_to_hex(remote),
(multi_ack ? " multi_ack" : ""),
(use_sideband == 2 ? " side-band-64k" : ""),
(use_sideband == 1 ? " side-band" : ""),
(args.use_thin_pack ? " thin-pack" : ""),
(args.no_progress ? " no-progress" : ""),
(args.include_tag ? " include-tag" : ""),
" ofs-delta");
else
packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
fetching++;
}
if (is_repository_shallow())
write_shallow_commits(fd[1], 1);
if (args.depth > 0)
packet_write(fd[1], "deepen %d", args.depth);
packet_flush(fd[1]);
if (!fetching)
return 1;
if (args.depth > 0) {
char line[1024];
unsigned char sha1[20];
while (packet_read_line(fd[0], line, sizeof(line))) {
if (!prefixcmp(line, "shallow ")) {
if (get_sha1_hex(line + 8, sha1))
die("invalid shallow line: %s", line);
register_shallow(sha1);
continue;
}
if (!prefixcmp(line, "unshallow ")) {
if (get_sha1_hex(line + 10, 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);
}
}
flushes = 0;
retval = -1;
while ((sha1 = get_rev())) {
packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
if (args.verbose)
fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
in_vain++;
if (!(31 & ++count)) {
int ack;
packet_flush(fd[1]);
flushes++;
/*
* We keep one window "ahead" of the other side, and
* will wait for an ACK only on the next one
*/
if (count == 32)
continue;
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));
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;
in_vain = 0;
got_continue = 1;
}
} while (ack);
flushes--;
if (got_continue && MAX_IN_VAIN < in_vain) {
if (args.verbose)
fprintf(stderr, "giving up\n");
break; /* give up */
}
}
}
done:
packet_write(fd[1], "done\n");
if (args.verbose)
fprintf(stderr, "done\n");
if (retval != 0) {
multi_ack = 0;
flushes++;
}
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 == 1)
return 0;
multi_ack = 1;
continue;
}
flushes--;
}
/* it is no error to fetch into a completely empty repo */
return count ? retval : 0;
}
static void receive_needs(void)
{
struct object_array shallows = OBJECT_ARRAY_INIT;
struct string_list deepen_not = STRING_LIST_INIT_DUP;
int depth = 0;
int has_non_tip = 0;
timestamp_t deepen_since = 0;
int deepen_rev_list = 0;
shallow_nr = 0;
for (;;) {
struct object *o;
const char *features;
struct object_id oid_buf;
char *line = packet_read_line(0, NULL);
const char *arg;
reset_timeout();
if (!line)
break;
if (skip_prefix(line, "shallow ", &arg)) {
struct object_id oid;
struct object *object;
if (get_oid_hex(arg, &oid))
die("invalid shallow line: %s", line);
object = parse_object(&oid);
if (!object)
continue;
if (object->type != OBJ_COMMIT)
die("invalid shallow object %s", oid_to_hex(&oid));
if (!(object->flags & CLIENT_SHALLOW)) {
object->flags |= CLIENT_SHALLOW;
add_object_array(object, NULL, &shallows);
}
continue;
}
if (skip_prefix(line, "deepen ", &arg)) {
char *end = NULL;
depth = strtol(arg, &end, 0);
if (!end || *end || depth <= 0)
die("Invalid deepen: %s", line);
continue;
}
if (skip_prefix(line, "deepen-since ", &arg)) {
char *end = NULL;
deepen_since = parse_timestamp(arg, &end, 0);
if (!end || *end || !deepen_since ||
/* revisions.c's max_age -1 is special */
deepen_since == -1)
die("Invalid deepen-since: %s", line);
deepen_rev_list = 1;
continue;
}
if (skip_prefix(line, "deepen-not ", &arg)) {
char *ref = NULL;
struct object_id oid;
if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
die("git upload-pack: ambiguous deepen-not: %s", line);
string_list_append(&deepen_not, ref);
free(ref);
deepen_rev_list = 1;
continue;
}
if (skip_prefix(line, "filter ", &arg)) {
if (!filter_capability_requested)
die("git upload-pack: filtering capability not negotiated");
parse_list_objects_filter(&filter_options, arg);
continue;
}
if (!skip_prefix(line, "want ", &arg) ||
get_oid_hex(arg, &oid_buf))
die("git upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
features = arg + 40;
if (parse_feature_request(features, "deepen-relative"))
deepen_relative = 1;
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;
if (allow_filter && parse_feature_request(features, "filter"))
filter_capability_requested = 1;
o = parse_object(&oid_buf);
if (!o) {
packet_write_fmt(1,
"ERR upload-pack: not our ref %s",
oid_to_hex(&oid_buf));
die("git upload-pack: not our ref %s",
oid_to_hex(&oid_buf));
}
if (!(o->flags & WANTED)) {
o->flags |= WANTED;
if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
|| 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 && !deepen_rev_list && shallows.nr == 0)
return;
if (depth > 0 && deepen_rev_list)
die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
if (depth > 0)
deepen(depth, deepen_relative, &shallows);
else if (deepen_rev_list) {
struct argv_array av = ARGV_ARRAY_INIT;
int i;
argv_array_push(&av, "rev-list");
if (deepen_since)
argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
if (deepen_not.nr) {
argv_array_push(&av, "--not");
for (i = 0; i < deepen_not.nr; i++) {
struct string_list_item *s = deepen_not.items + i;
argv_array_push(&av, s->string);
}
argv_array_push(&av, "--not");
}
for (i = 0; i < want_obj.nr; i++) {
struct object *o = want_obj.objects[i].item;
argv_array_push(&av, oid_to_hex(&o->oid));
}
deepen_by_rev_list(av.argc, av.argv, &shallows);
argv_array_clear(&av);
}
else
if (shallows.nr > 0) {
int i;
for (i = 0; i < shallows.nr; i++)
register_shallow(&shallows.objects[i].item->oid);
}
shallow_nr += shallows.nr;
object_array_clear(&shallows);
}
static void receive_needs(void)
{
struct object_array shallows = {0, 0, NULL};
static char line[1000];
int len, depth = 0;
if (debug_fd)
write_in_full(debug_fd, "#S\n", 3);
for (;;) {
struct object *o;
unsigned char sha1_buf[20];
len = packet_read_line(0, line, sizeof(line));
reset_timeout();
if (!len)
break;
if (debug_fd)
write_in_full(debug_fd, line, len);
if (!prefixcmp(line, "shallow ")) {
unsigned char sha1[20];
struct object *object;
use_thin_pack = 0;
if (get_sha1(line + 8, sha1))
die("invalid shallow line: %s", line);
object = parse_object(sha1);
if (!object)
die("did not find object for %s", line);
object->flags |= CLIENT_SHALLOW;
add_object_array(object, NULL, &shallows);
continue;
}
if (!prefixcmp(line, "deepen ")) {
char *end;
use_thin_pack = 0;
depth = strtol(line + 7, &end, 0);
if (end == line + 7 || depth <= 0)
die("Invalid deepen: %s", line);
continue;
}
if (prefixcmp(line, "want ") ||
get_sha1_hex(line+5, sha1_buf))
die("git upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
if (strstr(line+45, "multi_ack"))
multi_ack = 1;
if (strstr(line+45, "thin-pack"))
use_thin_pack = 1;
if (strstr(line+45, "ofs-delta"))
use_ofs_delta = 1;
if (strstr(line+45, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
else if (strstr(line+45, "side-band"))
use_sideband = DEFAULT_PACKET_MAX;
if (strstr(line+45, "no-progress"))
no_progress = 1;
if (strstr(line+45, "include-tag"))
use_include_tag = 1;
/* We have sent all our refs already, and the other end
* should have chosen out of them; otherwise they are
* asking for nonsense.
*
* Hmph. We may later want to allow "want" line that
* asks for something like "master~10" (symbolic)...
* would it make sense? I don't know.
*/
o = lookup_object(sha1_buf);
if (!o || !(o->flags & OUR_REF))
die("git upload-pack: not our ref %s", line+5);
if (!(o->flags & WANTED)) {
o->flags |= WANTED;
add_object_array(o, NULL, &want_obj);
}
}
if (debug_fd)
write_in_full(debug_fd, "#E\n", 3);
if (!use_sideband && daemon_mode)
no_progress = 1;
if (depth == 0 && shallows.nr == 0)
return;
if (depth > 0) {
struct commit_list *result, *backup;
int i;
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);
}
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;
if (parse_commit((struct commit *)object))
die("invalid commit");
parents = ((struct commit *)object)->parents;
while (parents) {
add_object_array(&parents->item->object,
NULL, &want_obj);
parents = parents->next;
}
}
/* 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);
}
free(shallows.objects);
}
