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 void update_shallow(struct fetch_pack_args *args,
struct ref **sought, int nr_sought,
struct shallow_info *si)
{
struct sha1_array ref = SHA1_ARRAY_INIT;
int *status;
int i;
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);
return;
}
if (!si->shallow || !si->shallow->nr)
return;
if (args->cloning) {
/*
* remote is shallow, but this is a clone, there are
* no objects in repo to worry about. Accept any
* shallow points that exist in the pack (iow in repo
* after get_pack() and reprepare_packed_git())
*/
struct sha1_array extra = SHA1_ARRAY_INIT;
unsigned char (*sha1)[20] = si->shallow->sha1;
for (i = 0; i < si->shallow->nr; i++)
if (has_sha1_file(sha1[i]))
sha1_array_append(&extra, sha1[i]);
if (extra.nr) {
setup_alternate_shallow(&shallow_lock,
&alternate_shallow_file,
&extra);
commit_lock_file(&shallow_lock);
}
sha1_array_clear(&extra);
return;
}
if (!si->nr_ours && !si->nr_theirs)
return;
remove_nonexistent_theirs_shallow(si);
if (!si->nr_ours && !si->nr_theirs)
return;
for (i = 0; i < nr_sought; i++)
sha1_array_append(&ref, sought[i]->old_sha1);
si->ref = &ref;
if (args->update_shallow) {
/*
* remote is also shallow, .git/shallow may be updated
* so all refs can be accepted. Make sure we only add
* shallow roots that are actually reachable from new
* refs.
*/
struct sha1_array extra = SHA1_ARRAY_INIT;
unsigned char (*sha1)[20] = si->shallow->sha1;
assign_shallow_commits_to_refs(si, NULL, NULL);
if (!si->nr_ours && !si->nr_theirs) {
sha1_array_clear(&ref);
return;
}
for (i = 0; i < si->nr_ours; i++)
sha1_array_append(&extra, sha1[si->ours[i]]);
for (i = 0; i < si->nr_theirs; i++)
sha1_array_append(&extra, sha1[si->theirs[i]]);
setup_alternate_shallow(&shallow_lock,
&alternate_shallow_file,
&extra);
commit_lock_file(&shallow_lock);
sha1_array_clear(&extra);
sha1_array_clear(&ref);
return;
}
/*
* remote is also shallow, check what ref is safe to update
* without updating .git/shallow
*/
status = xcalloc(nr_sought, sizeof(*status));
assign_shallow_commits_to_refs(si, NULL, status);
if (si->nr_ours || si->nr_theirs) {
for (i = 0; i < nr_sought; i++)
if (status[i])
sought[i]->status = REF_STATUS_REJECT_SHALLOW;
}
free(status);
sha1_array_clear(&ref);
}
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 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;
struct fetch_negotiator negotiator;
fetch_negotiator_init(&negotiator, negotiation_algorithm);
sort_ref_list(&ref, ref_compare_name);
QSORT(sought, nr_sought, cmp_ref_by_name);
if ((args->depth > 0 || is_repository_shallow(the_repository)) && !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 (!args->no_dependents) {
mark_complete_and_common_ref(&negotiator, args, &ref);
filter_refs(args, &ref, sought, nr_sought);
if (everything_local(args, &ref)) {
packet_flush(fd[1]);
goto all_done;
}
} else {
filter_refs(args, &ref, sought, nr_sought);
}
if (find_common(&negotiator, 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:
negotiator.release(&negotiator);
return ref;
}